← New search

2015 Hyundai Sonata

Owner reports · Recalls · Investigations

More warning signs than most Sonata years

Owner complaints for the 2015 Hyundai Sonata are substantially higher than the model-year median of 161.

About this comparison →

When problems were reported

Mileage at the reported incident

597 reports with mileage · 547 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Engine. Review the 623 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 167 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 134 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

34 crash reports48 fire reports24 injury reports

Engine complaints

623 reports
Clear category filter
Mileage unknown · Jan 24, 2022
Engine

The engine is burning over 5 quarts of oil between 600 and 1000 miles. The engine is the 2.4 litre and it is doing the same as the 2014 and previous model. It is also known that the 2016 has the same issue. Hyundai refuses to replace the motor or cover any cost. They are saying that the car is out of warranty when it has bee…

Read full complaint

The engine is burning over 5 quarts of oil between 600 and 1000 miles. The engine is the 2.4 litre and it is doing the same as the 2014 and previous model. It is also known that the 2016 has the same issue. Hyundai refuses to replace the motor or cover any cost. They are saying that the car is out of warranty when it has been in the shop for oil consumption pre-mileage but they said it was normal to be a quart or 2 low. Now the motor will be empty by 600 to 1000 miles. The dealers wants to put chemicals in the motor at a cost of 200 plus with now promise of resolving the issue. In addition it has been proven that these quick fixes are catastrophic and will cost more than an engine maybe a life in traffic.

NHTSA ODI #11448573

Mileage unknown · Jan 18, 2022
Engine

During weekend road trip, on the way back, engine has developed knocking noise, unusual vibrations, and loss of power. Car was able to make it home at low speeds with minimal acceleration. Oil check revealed that all of oil was burned up over a few days, as the oil check before the weekend trip showed full levels. Dealer would n…

Read full complaint

During weekend road trip, on the way back, engine has developed knocking noise, unusual vibrations, and loss of power. Car was able to make it home at low speeds with minimal acceleration. Oil check revealed that all of oil was burned up over a few days, as the oil check before the weekend trip showed full levels. Dealer would not even accept looking at the car for over a month, before their first available appointment. Independent mechanic confirmed engine knocking, burned up oil. They recommended engine replacement, but were not able to complete the job as the company would not make replacement parts available to them. Dealer has finally accepted car, also confirmed knocking noise and burned up oil. It would take another month for dealer to produce a repair quote -- $14,000 for engine replacement and additional 2 months of wait time for some parts to arrive -- much higher than what I understand it typically costs for a full engine replacement, but the dealer is left as the only option to charge however much they want, as independent services are blocked from acquiring needed parts. 87,000 mi in just over 6 years of use. No warning lights on the dash. No OBD status codes. All together this would add up to at least 5 months of inoperable car, and what looks to be a very inflated repair bill. Dealer is recommending a purchase of a new car from them instead.

NHTSA ODI #11447956

Mileage unknown · Jan 18, 2022
Engine

Hyundai reprogramed their Theta engines to prevent an ongoing problem related to Theta engines not receiving oil to the crankshaft and connecting rod bearings. The software modification was done by an unknown software house. When I got the first notice, I asked both the local dealer, and the official Hyundai site if this softw…

Read full complaint

Hyundai reprogramed their Theta engines to prevent an ongoing problem related to Theta engines not receiving oil to the crankshaft and connecting rod bearings. The software modification was done by an unknown software house. When I got the first notice, I asked both the local dealer, and the official Hyundai site if this software would cut power, potentially at the wrong time, like going up an entrance ramp. I got no response and I found out why. I tried entering a highway where traffic was at 75 mph. When I got onto the ramp the car was running fine. Suddenly the power just went away. I had the gas pedal all the way to the floor and watched the tachometer and speedometer go down rather than up. I pulled off at the next exit and switched the programming on my transmission to normal from econ mode. Up the ramp I went, and car started slowing down. Tried one more time using the sport mode and the power went away. I'm afraid to try and run on a freeway at rush our because of the lack of power. I think the needs to be a review of the software and see if changes can be made.

NHTSA ODI #11447899

Mileage unknown · Jan 17, 2022
Engine

Car engine light turns on indicating connecting rod bearing failure. Vehicle has stopped running properly while driving at high speeds & caused safety concerns. Issue has shown to be consistent across many other Hyundai vehicles. Issue has not yet been checked by manufacturer but is available for future inspection.

NHTSA ODI #11447799

Mileage unknown · Jan 15, 2022
Engine

The Camshaft Seals are defective and cause the engine light to come on and also I experience power loss while driving on the highway.

NHTSA ODI #11447627

Mileage unknown · Jan 15, 2022
Engine

Vehicle info: 2015 Sonata Se. 97450 Mileage. As with most all complaints with this engine, it is deteriorating slowly as the knock sensor code P1326 has sensed a knock. A private mechanic has verified that a rod bearing is either bent or broken and knocking against the engine. This is after two Hyundai dealers have denied eve…

Read full complaint

Vehicle info: 2015 Sonata Se. 97450 Mileage. As with most all complaints with this engine, it is deteriorating slowly as the knock sensor code P1326 has sensed a knock. A private mechanic has verified that a rod bearing is either bent or broken and knocking against the engine. This is after two Hyundai dealers have denied even inspecting my vehicle. Due to the title status of my vehicle (rebuilt title) Hyundai dealers (King Hyundai in Deerfield Beach, FL and Coconut Creek Hyundai in Coconut Creek, FL) are denying repairs because the engine has no active campaigns or recalls on the engine even though Hyundai Motors of America has extended the warranty to a lifetime duration for this exact issue. This is a huge liability situation as these engines are known to catch fire for this very issue and Hyundai/Kia has been fined $140 Million for not acting sooner on this matter. These vehicles have been known to catch fire inside the dealership service center while going through diagnostic testing by certified mechanics. I have had the Campaign 953 serviced in 2018, which was a software update to alert owners when the engine is already failing (sensing a bearing rod broken). This campaign did not address the faulty engine but only alert you. Hyundai Motor America has told me that a Hyundai dealership should not deny me warranty coverage however every dealership in Palm Beach and Broward counties are denying my service order approval. Service managers refuse to send in a pre-authorization to Hyundai Motor America despite corporates approval of this warranty coverage therefore nobody wants to take responsibility nor liability for a known safety defect in Hyundai engines.

NHTSA ODI #11447577

124,000 miles · Jan 14, 2022
Engine

The contact owns a 2015 Hyundai Sonata. The contact stated the vehicle was hard to start. After the vehicle was started, the started shaking abnormally. The check engine and ABS warning lights were illuminated. The vehicle was taken to an independent mechanic who informed the contact about the engine combustion. The vehicle was …

Read full complaint

The contact owns a 2015 Hyundai Sonata. The contact stated the vehicle was hard to start. After the vehicle was started, the started shaking abnormally. The check engine and ABS warning lights were illuminated. The vehicle was taken to an independent mechanic who informed the contact about the engine combustion. The vehicle was towed to the local dealer where it was diagnosed that oil was leaking onto the spark plugs. The vehicle was not repaired. The manufacturer was notified of the failure however, no further assistance was provided. The approximate failure mileage was 124,000.

NHTSA ODI #11447534

113,000 miles · Jan 12, 2022
Engine

The contact owns a 2015 Hyundai Sonata. The contact stated that the vehicle was consuming an excessive amount of engine oil. Upon inspection, the contact noticed there was no oil on the dipstick. The vehicle was taken to the independent mechanic and diagnosed that there was no oil in the oil reservoir. The mechanic added four qu…

Read full complaint

The contact owns a 2015 Hyundai Sonata. The contact stated that the vehicle was consuming an excessive amount of engine oil. Upon inspection, the contact noticed there was no oil on the dipstick. The vehicle was taken to the independent mechanic and diagnosed that there was no oil in the oil reservoir. The mechanic added four quarts of oil to the oil reservoir and referred the contact to the dealer. The dealer was made aware of the failure and scheduled an upcoming appointment for an oil consumption test. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 113,000.

NHTSA ODI #11447215

Mileage unknown · Jan 8, 2022
Engine

Driving my sonata in town 40 miles per hour got to a light and check engine light started flashing I pulled over and parked it in an advanced auto parking lot parts man come out put scanner in car and read code p00137 knock sensor so I had it towed to home due to I called hyundai and mechanic said it would be around the 16th bef…

Read full complaint

Driving my sonata in town 40 miles per hour got to a light and check engine light started flashing I pulled over and parked it in an advanced auto parking lot parts man come out put scanner in car and read code p00137 knock sensor so I had it towed to home due to I called hyundai and mechanic said it would be around the 16th before he could look at it. I tried to start cat again and would not crank I went on line and jumped car from relay and motor is seized up. Have about 135 ,000 miles roughly and now looking into problem car drinks oil like fierce and now motor is bad

NHTSA ODI #11446702

Mileage unknown · Jan 4, 2022
Electrical SystemEngine

Out of the blue, I heard a very loud knocking noise coming from my engine. I was driving my children to school and as I hit the gas pedal the less power my car had. Not only would it not accelerate much but even the lights would dim. I am now paying over $400 a month for a car that I can not drive and walking where I need to go.…

Read full complaint

Out of the blue, I heard a very loud knocking noise coming from my engine. I was driving my children to school and as I hit the gas pedal the less power my car had. Not only would it not accelerate much but even the lights would dim. I am now paying over $400 a month for a car that I can not drive and walking where I need to go. My vin number does not qualify me for the engine recall Hyundai has, even though my car is the right year, make and model, engine size and problem that the recall is for. Awesome right?

NHTSA ODI #11446136

Official recalls

9

21V749000 · Electrical System:software; Exterior Lighting:turn Signal

Sep 24, 2021

Hyundai Motor America (Hyundai) is recalling certain 2015-2017 Sonata, 2016-2017 Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box (SJB) software logic may not properly interpret the signals received from the multifunction switch, which could cause the turn signal to activate in the opposite direction of what the driver intended.

Consequence & remedy

Consequence: A turn signal that activates in the opposite direction of what was intended by the driver increases the risk of a crash.

Remedy: Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.

Additional source detail variants (2)

Electrical System:software

Hyundai Motor America (Hyundai) is recalling certain 2015-2017 Sonata, 2016-2017 Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box (SJB) software logic may not properly interpret the signals received from the multifunction switch, which could cause the turn signal to activate in the opposite direction of what the driver intended.

Consequence: A turn signal that activates in the opposite direction of what was intended by the driver increases the risk of a crash.

Remedy: Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.

Exterior Lighting:turn Signal

Hyundai Motor America (Hyundai) is recalling certain 2015-2017 Sonata, 2016-2017 Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box (SJB) software logic may not properly interpret the signals received from the multifunction switch, which could cause the turn signal to activate in the opposite direction of what the driver intended.

Consequence: A turn signal that activates in the opposite direction of what was intended by the driver increases the risk of a crash.

Remedy: Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.

17V359000 · Parking Brake:indicator Light

Jun 5, 2017

Hyundai Motor America (Hyundai) is recalling certain 2015-2016 Sonata and Genesis vehicles. In the affected vehicles, the warning light to indicate that the parking brake is applied may intermittently not illuminate in the dash due to corrosion in the switch.

Consequence & remedy

Consequence: If the parking brake indicator is not illuminated when the parking brake is applied, the driver may operate the vehicle with the parking brake partially engaged, increasing the risk of a crash.

Remedy: Hyundai will notify owners, and dealers will replace the parking brake switch, free of charge. The recall began on August 4, 2017. Owners may contact Hyundai customer service at 1-855-671-3059. Hyundai's number for this recall is 164.

16V726000 · Visibility:sun/moon Roof Assembly

Oct 11, 2016

Hyundai Motor America (Hyundai) is recalling certain model year 2015-2016 Sonata Hybrid vehicles manufactured December 8, 2014, to August 18, 2015, and Hyundai Sonata vehicles manufactured May 28, 2014, to March 18, 2016, equipped with the panoramic sunroof option. Due to a bonding issue with the sunroof wind deflector, the sunroof panel on the affected vehicles may detach while driving.

Consequence & remedy

Consequence: If the sunroof detaches from the vehicle it could become a road hazard, increasing the risk of a crash.

Remedy: Hyundai will notify owners, and dealers will repair the wind deflector anchor plate, free of charge. The recall began December 2016. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 152.

16V232000 · Air Bags:frontal

Apr 21, 2016

Hyundai Motor Company (Hyundai) is recalling certain model year 2015-2016 Sonata vehicles manufactured May 29, 2014 to February 11, 2016, 2017 Elantra vehicles manufactured January 12, 2016 to February 22, 2016, and one 2016 Sonata Hybrid vehicle manufactured October 15, 2015. In these vehicles, the driver's frontal air bag may be missing a chemical enhancer required for the second stage air bag deployment, resulting in the second stage not deploying in certain crashes. The primary stage will deploy as intended.

Consequence & remedy

Consequence: An air bag that does not inflate increases the risk of injury.

Remedy: Hyundai will notify owners, and dealers will replace the driver's frontal air bag module, free of charge. The recall began on May 5,2016. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 144.

15V678000 · Electrical System: Instrument Cluster/panel

Oct 20, 2015

Hyundai Motor America (Hyundai) is recalling certain model year 2015-2016 Sonata vehicles manufactured May 28, 2014, to August 21, 2015. The affected vehicles are equipped with an Antilock Braking System (ABS) warning light intended to warn the driver if there is an ABS malfunction. In the event of an ABS malfunction, the Brake System warning light will illuminate, but the ABS warning light will not illuminate. Since the vehicles have ABS malfunction lights that do not illuminate, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 135, "Light Vehicle Brake Systems."

Consequence & remedy

Consequence: If the driver is alerted there is a brake system malfunction, but not specifically with the ABS system, the driver may operate the vehicle unaware that the vehicle's brakes may lock up during hard braking, increasing the risk of a crash.

Remedy: Hyundai will notify owners, and dealers will update the ABS control unit software, free of charge. The recall is expected began on November 30, 2015. Owners may contact Hyundai customer service at 1-855-671-3059. Hyundai's number for this recall is 134.

15V414000 · Seat Belts:front:buckle Assembly

Jun 30, 2015

Hyundai Motor America (Hyundai) is recalling certain model year 2015 Sonata vehicles manufactured April 25, 2014, to December 4, 2014. The affected vehicles have a front passenger seat belt whose buckle latch assembly may prevent the front passenger from fastening the seat belt.

Consequence & remedy

Consequence: If the front passenger seat belt cannot be latched, an occupant sitting in the front passenger seat has an increased risk of injury in the event of a crash.

Remedy: Hyundai will notify owners, and dealers will repair or replace the front passenger seat belt buckle, free of charge. The recall began on September 15, 2015. Owners may contact Hyundai customer service at 1-855-671-3059. Hyundai's number for this recall is 130.

14V784000 · Power Train:axle Assembly:axle Shaft

Dec 9, 2014

Hyundai Motor America (Hyundai) is recalling certain 1.6 liter model year 2015 Sonata vehicles manufactured August 29, 2014, to October 28, 2014. The affected vehicles may have been assembled with an incorrect left axle shaft which may result in the shaft separating from the transaxle differential.

Consequence & remedy

Consequence: If the left axle shaft separates from the transaxle, the vehicle may stop moving, increasing the risk of a crash. Additionally, a separated axle shaft may allow the vehicle to roll away as the driver and other occupants exit the vehicle or anytime thereafter. A vehicle rollaway increases the risk of injury to exiting occupants and bystanders.

Remedy: Hyundai will notify owners, dealers will inspect and replace the axle shaft, as necessary, free of charge. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 126.

14V368000 · Service Brakes, Hydraulic:foundation Components:disc:caliper

Jun 24, 2014

Hyundai Motor Company (Hyundai) is recalling certain model year 2015 Sonata vehicles manufactured April 25, 2014, through June 16, 2014. Due to a manufacturing error, one or both of the front brake calipers may fracture.

Consequence & remedy

Consequence: If a brake caliper fractures, brake effectiveness would be reduced, lengthening to distance required to stop the vehicle, increasing the risk of a crash.

Remedy: Hyundai contacted the affected owners on June 19, 2014 and instructed them not to drive their vehicles. Hyundai dealers will replace the affected brake calipers, free of charge. The recall began on September 12, 2014. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 120.

14V325000 · Electrical System:wiring; Steering

Jun 12, 2014

Hyundai Motor Company (Hyundai) is recalling certain model year 2015 Sonata vehicles manufactured May 2, 2014, through May 23, 2014. A poor connection within the vehicle's wiring harness may result in a reduction of steering assist from the vehicle's motor driven power steering system or the inability to move the vehicle's shifter from the Park position.

Consequence & remedy

Consequence: The reduction of power steering assist can increase the steering effort needed, increasing the risk of a crash.

Remedy: Hyundai notified dealers to suspend sales of affected Sonata vehicles and has published recall bulletin 14-01-024 providing a service procedure to repair the affected vehicles. On June 7, 2014 Hyundai began to contact the affected retail customers. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 119.

Additional source detail variants (2)

Electrical System:wiring

Hyundai Motor Company (Hyundai) is recalling certain model year 2015 Sonata vehicles manufactured May 2, 2014, through May 23, 2014. A poor connection within the vehicle's wiring harness may result in a reduction of steering assist from the vehicle's motor driven power steering system or the inability to move the vehicle's shifter from the Park position.

Consequence: The reduction of power steering assist can increase the steering effort needed, increasing the risk of a crash.

Remedy: Hyundai notified dealers to suspend sales of affected Sonata vehicles and has published recall bulletin 14-01-024 providing a service procedure to repair the affected vehicles. On June 7, 2014 Hyundai began to contact the affected retail customers. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 119.

Steering

Hyundai Motor Company (Hyundai) is recalling certain model year 2015 Sonata vehicles manufactured May 2, 2014, through May 23, 2014. A poor connection within the vehicle's wiring harness may result in a reduction of steering assist from the vehicle's motor driven power steering system or the inability to move the vehicle's shifter from the Park position.

Consequence: The reduction of power steering assist can increase the steering effort needed, increasing the risk of a crash.

Remedy: Hyundai notified dealers to suspend sales of affected Sonata vehicles and has published recall bulletin 14-01-024 providing a service procedure to repair the affected vehicles. On June 7, 2014 Hyundai began to contact the affected retail customers. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 119.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

4

DP22003 · Loss Of Motive Power

Opened Sep 12, 2022 · Closed Dec 12, 2023

Status: closed (inferred from source dates) · Engine

The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003) to evaluate the Petitioners’ request. The Petitioners have provided additional complaints within four supplemental letters dated January 31, 2023, March 21, 2023, May 23, 2023, and August 4, 2023. ODI’s evaluation included the review and analysis of the complaints and supporting information submitted by the Petitioners, as well as additional complaints submitted directly to NHTSA which referenced either the oil drain plug or a crack in the oil pan. After reviewing the available data, ODI has not identified evidence that would support opening a defect investigation into the oil drain pan assemblies of the subject vehicles. Based on a review of the available information, a loss of motive power resulting from an oil drain plug back out has not occurred between the initial sale of a vehicle and the completion of its first oil change. If during an oil change service, a technician fails to remove the existing drain plug gasket before installing a new gasket, it is likely that a proper seal between the drain plug and the oil pan will not be made. An improper seal between the drain plug and oil pan could lead to the backing out on the drain plug, resulting in the sudden loss of oil while driving. Additionally, the provided examples of oil pan cracks were localized to the immediate vicinity of the oil drain plug and/or appeared to be the result of direct-contact with a tool during servicing.  There is no information to support that a vehicle-based defect exists relating to the oil pan assembly, and instead the documented incidents are related to the failure to follow the proper maintenance procedures during oil change service. In October 2023, Hyundai published a Technical Service Bulletin (TSB) that provided detailed instructions for oil change service on its gasoline powered vehicles, specifically highlighting the need to remove and replace the existing drain plug gasket prior to reinstalling the drain plug. After a thorough review of the material submitted by the petitioner, the information already in NHTSA's possession, and the potential risks to motor vehicle safety implicated by the petitioners' allegations, NHTSA does not believe that a formal investigation is warranted. Therefore, the petition is denied. A Federal Register Notice (FRN) further detailing NHTSA’s reasons for denial of the petition will be published. The reference numbers for the complaints to NHTSA cited by the petitioner can be found in the petition submission documents in the public file for DP22-003. To review those complaints and the additional complaints ODI added to its evaluation which are cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

EA21003 · Engine Fires

Opened Dec 22, 2021 · Closed Feb 5, 2024

Status: closed (inferred from source dates) · Engine

On March 29, 2019, the Office of Defects Investigation (ODI) opened two Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) to broadly investigate incidents of non-crash fires (regardless of origin or operational status of the vehicle) on various model year Hyundai and Kia vehicles.  During the PE investigations, Hyundai and Kia issued several recalls to address vehicle fires, including those due to engine failures involving various engine types.  The remedies for the engine failure recalls typically involve engine inspection (to detect existing damage), and if necessary, engine replacement.  Additionally, both manufacturers have been installing an engine control software modification known as Knock Sensor Detection Software (KSDS) which is intended to detect impending engine failure, alert the driver, and limit engine power (to lessen likelihood of engine failure).KSDS is being installed under recalls and non-safety field actions, and both companies have extended limited engine warranties (see recall files). On December 22, 2021, ODI upgraded PE19-003 and PE19-004 to this Engineering Analysis (EA21-003, covering both Hyundai and Kia) to evaluate the scope of the prior recalls related to engine failures/fires and the efficacy of the recall remedies for the recalls, as well as the long-term viability of related programs and non-safety field actions being conducted by Hyundai and Kia.  The former issue involved approximately 550,000 MY 2013 Hyundai Elantra, MY 2011 Kia Sorento, and MY 2012-2015 Kia Rio.  The latter issue involved approximately 2.5 million recalled vehicles, which have been identified as displaying potential remedy concerns: Hyundai recalls 15V-568, 17V-226, 20V-746, and 21V-727; and Kia recalls 17V-224, 19V-120, 20V-750, and 21V-844. Regarding the recall scope issue, among all of the scope vehicles identified at EA opening, ODI found only the MY 2011 Kia Sorento vehicles equipped with both the Theta II 2.4L 4-cylinder Multi-Point Injection (MPI) and the Lambda II 3.5L 6-cylinder MPI engines experienced relatively high rates of reported fires.  In December 2023, Kia issued recall 23V-877 that will cover about 80,000 MY 2011 Kia Sorento vehicles equipped with the Theta II 2.4L MPI engines.  The remedy will involve an inspection, and if necessary, a replacement of the engine, as well as the installation of KSDS.  It should be noted that in 2021 these vehicles were included in a KSDS product improvement campaign with warranty extension.  For the MY 2011 Sorento vehicles equipped with the Lambda II 3.5L engines, ODI believes that future engine failures/fires involving these vehicles will likely be due to a lax in adhering to the proper or scheduled engine maintenance (regular engine oil changes), rather than a design or manufacturing engine issue. Regarding the issue of the efficacy of the recall remedies, ODI found the majority of the recalled Hyundai and Kia vehicles, by model, experienced lower reported fire rates after the remedies were applied.  Furthermore, ODI found that for most vehicles that did not receive the recall remedies, by model, experienced relatively high fire rates.  To address this problem, Hyundai informed ODI in December 2023, that it will renotify all of its owners covered by the Hyundai recalls of engine failures/fires every 8 months for the next 3 years.  In December 2023, Kia stated that it will renotify the majority of its owners every 8 months for the next 3 years.Several previously recalled Kia models are excluded from the renotification due to their lower reported rates of engine fires.  Overall, the renotification actions will help to increase the recall completion rates, thus reduce the frequency of engine fires in the future. In view of the recall action being taken by Kia and renotification actions being taken by both Kia and Hyundai, ODI is closing this Engineering Analysis.  Also, both companies have been released from the 2020-iniated Consent Orders (Kia since November 2022 and Hyundai since November 2023).  The agency reserves the right to take additional action if warranted by future circumstances.  To review the reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

DP21003 · Throttle Control System Vulnerabilities

Opened Nov 12, 2021 · Closed Jun 20, 2023

Status: closed (inferred from source dates) · Vehicle Speed Control:throttle

The Office of Defects Investigation (ODI) of the National Highway Traffic Safety Administration (NHTSA) received a petition letter dated October 10, 2021, requesting an investigation of possible defects in the electronic throttle control (ETC) system on certain Kia vehicles resulting in the opening of DP21-003. Accordingly, Model Year (MY) 2005-2016 Kia Optima/K5, MY 2006-2015 Kia Sorento, MY 2007-2016 Hyundai Elantra, MY 2007-2016 Hyundai Santa Fe, MY 2006-2015 Hyundai Sonatas are all part of the subject population. The petition was originally filed as a Vehicle Owner Questionnaire that can be reviewed at NHTSA.gov under reference (ODI) number 11439675.On November 12, 2021, ODI opened Defect Petition DP21-003 to evaluate the petitioner?s request. ODI performed trend analyses of the VOQs related to vehicle speed control issues for all the subject vehicles and found that none of the 52 Model/Model Year Hyundai/Kia vehicles demonstrated any actionable trend that warranted an investigation.Petitioners submitted 1119 VOQs and non-VOQ cases in which sudden uncommanded acceleration (SUA) or loss of motive power (LOMP) incidents were alleged.For the 1119 reports, 220 were incidents involving crashes, from which 69 subject Hyundai-Kia vehicles were inspected by Hyundai/Kia dealer technicians, Hyundai/Kia engineers, and/or third-party representatives.ODI found the inspections identified no vehicle defects related to the ETC system.Of the 220 crash-involved reports, 13 Event Data Recorder (EDR) records were downloaded successfully and 11 of those indicated driver error: (i.e.) pedal misapplication.A condition where the accelerator pedal is mistakenly applied instead of the brake pedal when the driver wants to stop the vehicle.In addition, ODI reviewed a scientific journal paper published in Forensic Science International in 2016 by Mr. Park et al ., as well as related test videos. ODI does not believe there is any evidence of uncontrollable SUA occurrences in any of the tests reviewed. NHTSA's Office of Vehicle Safety Compliance (OVSC) reviewed the allegations regarding the potential noncompliance with Federal Motor Vehicle Safety Standard No. 124.Based on the information provided, the Agency concludes there is insufficient information for us to determine if a possible non-compliance exists.Finally, both Hyundai and Kia informed ODI that all their vehicles manufactured after 2012 were equipped with an ETC management system, in which the engine speed will go to idle when the system sees signals from both the brake pedal and accelerator pedal at the same time; this is commonly known as the brake-throttle override system.After thoroughly assessing the material submitted by the petitioner, information already in NHTSA's possession, information submitted by Hyundai and Kia in response to an Information Request letter, and the potential risks to safety implicated by the petitioner's allegation, NHTSA does not believe that a formal investigation is warranted. After full consideration of appropriate factors, the petition is denied. A Federal Register Notice (FRN) further detailing NHTSA?s reasons for denial of the petition will be published.

EA19001 · Electrical Overstress

Opened Apr 19, 2019 · Closed Sep 19, 2024

Status: closed (inferred from source dates) · Air Bags: Air Bag/restraint Control Module

The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect.  During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped with an airbag control unit (ACU) for the supplemental restraint system (SRS) Electronic Control Unit (ECU) manufactured by ZF-TRW.  The ECU receives signals from crash sensors mounted in the vehicle and deploys the vehicle air bags and seat belt pretensioners in accordance with manufacturer design specifications.  The ECU in the subject vehicles contains a model DS84 application-specific integrated circuit (ASIC) which controls the communication of the crash sensor signal, firing commands (i.e., when to deploy the airbag(s) and/or pretensioners), and fault information (e.g., diagnostic trouble codes). In September 2016, FCA announced recall 16V-668 for certain model year (MY) 2010 to 2014 Chrysler, Dodge and Jeep products manufactured with the subject ZF-TRW ACU.  In this recall, FCA discussed an EOS condition that resulted in a failure of the subject DS84 ASIC, which caused air bag non-deployment.  FCA noted that the defect condition had only been observed in vehicles equipped with sensor harnessing routed across the front of the vehicle.  Other FCA vehicles that also used the subject ACU, but were not equipped with cross-car harnessing, had not experienced EOS failures, despite similar time in service. During the course of this investigation, ODI sent two separate Information Request (IR) letters to six vehicle manufactures (including FCA, Hyundai, Honda, Kia, Mitsubishi, and Toyota) and one IR letter to ZF-TRW.  These IR letters resulted in ODI receiving comprehensive data from these manufacturers and suppliers. Studies of this data found that the DS84 ASIC does not have sufficient protection against negative electrical transients or electrical overstress (“EOS”) that can be generated in certain severe crashes.  An electrical transient occurs when the electrical power supplied to a circuit changes momentarily over a short duration of time.   In these severe crash cases, the crash sensors and other powered wiring can be damaged and short circuited so as to create a negative electrical transient of sufficient intensity and duration (that are outside the vehicle manufacturer's specification) to damage the ASIC before the restraint device deployment signal is received by the SRS ECU.  This damaged signal can lead to incomplete or nondeployment of the air bags and/or pretensioners.  Airbag non-deployment and/or lack of pretensioner operation can increase the risk or severity of injury in a crash.A total of 8 fatalities and 14 injuries were associated with known EOS events. The common element in all investigated manufacturers vehicles is the SRS ECU containing a DS84 ASIC manufactured by ZF-TRW.  The risk associated with the ASIC is equally shared among all OEMS involved in the investigation.  The actual real-world risk can be mitigated by other factors which were assessed by ODI during this investigation. The first mitigating factor involves protections built into the ACU design which protect the DS84 ASIC from damage.  There are multiple strategies and levels of protection employed by different OEMs that provide effective EOS mitigation.  The two most common strategies at the ACU level are circuit protection diodes on the remote senor signal lines, and current limiting resistors that protect critical components. The second mitigating factor is found at the vehicle level and involves the location and routing of the wires leading from the crash sensors to the SRS ECU.  If the wires are well protected in a crash and are not routed with other power wires carrying large currents, the risk for an EOS event is significantly reduced or eliminated. These design specific factors combine to produce a spectrum of risk for the vehicles equipped with ACUs using the DS84 ASIC.  Given the many of years of field exposure, it is possible to divide the subject population into two groups; vehicles which have experienced EOS events, and vehicles which have not experienced EOS field events. Four of the six OEMs involved in this investigation have experienced EOS field events on at least one of their models equipped with a DS84 ASIC.  All vehicle models (including the Toyota models identified in the Failure Report Summary of the opening resume for this investigation) with field events have been recalled.  In an abundance of caution, ODI kept this investigation open five years to monitor field performance and did not identify any field events on vehicles not included in existing safety recalls. Given the spectrum of risk identified in this investigation and that all vehicles with a demonstrated unreasonable risk have been recalled, ODI is closing this investigation. ODI is closing this investigation with the following manufacturer safety recalls: 16V-668, 18E-043, 18V-137, 18V-363, and 20V-024.  With the recall actions taken by the subject vehicle and equipment manufacturers, this investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exists on other model or model year vehicles outside of the recall scopes. The agency reserves the right to take further action if warranted by the circumstances.