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2018 Toyota Corolla

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2018 Toyota Corolla do not stand out strongly from the model-year median of 129.

About this comparison →

When problems were reported

Mileage at the reported incident

73 reports with mileage · 60 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.

  • Air Bags. Review the 35 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel/propulsion System. Review the 23 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

25 crash reports5 fire reports14 injury reports

Air Bags complaints

35 reports
Clear category filter
Mileage unknown · Oct 19, 2025
Air Bags

On October 17, 2025, a 2018 Toyota Corolla LE was delivered to an authorized Toyota dealership for an airbag recall repair. The recall involved the airbag electronic control unit (ECU), which, according to Toyota and the National Highway Traffic Safety Administration (NHTSA), may fail to deploy the airbags and/or seatbelt preten…

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On October 17, 2025, a 2018 Toyota Corolla LE was delivered to an authorized Toyota dealership for an airbag recall repair. The recall involved the airbag electronic control unit (ECU), which, according to Toyota and the National Highway Traffic Safety Administration (NHTSA), may fail to deploy the airbags and/or seatbelt pretensioners during certain types of crashes due to inadequate protection against electrical noise. The vehicle was picked up on October 18, 2025, after the dealer reported the recall repair as completed. Before the recall, the vehicle displayed a clear and consistent safety issue: the “Passenger Airbag OFF” indicator stayed illuminated even when a full-size adult occupant (approximately 208 lbs) was seated in the front passenger seat. After the recall repair, the exact same issue persisted with no improvement. The repair was ineffective, as the system still failed to recognize an occupied seat, and the passenger airbag continued to show “OFF.” When this was reported to the dealership immediately after pickup, staff incorrectly stated that the recall concerned metal fragments inside the airbags. This is inaccurate. The official recall documentation from Toyota and NHTSA clearly identifies the defect as non-deployment of airbags and seatbelt pretensioners, not metal fragments. The dealership then advised that a diagnostic inspection would be needed for a $175 fee. However, since this issue directly involves the same safety components addressed by the recall and remains unresolved after the recall repair, it should be re-inspected free of charge under recall coverage. Charging a diagnostic fee in this case is unreasonable, given that the recall repair did not correct the problem as intended. This ongoing malfunction presents a serious safety risk, as the airbag may fail to deploy in a crash. The problem likely involves a defective occupant detection sensor or an improperly functioning ECU/noise filter following the recall service.

NHTSA ODI #11694365

Mileage unknown · May 18, 2024
Air BagsSteering

A car was going to hit my car, I went to hit the horn and the horn doesn't work a few days later a airbag light went on. Went to the dealership and they said it's a know malfunction in toyota corolla. They are not sure if the airbags will work or not. They recommend that I put a notice in for recall since there are still no reca…

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A car was going to hit my car, I went to hit the horn and the horn doesn't work a few days later a airbag light went on. Went to the dealership and they said it's a know malfunction in toyota corolla. They are not sure if the airbags will work or not. They recommend that I put a notice in for recall since there are still no recalls. This is a huge safety issue.

NHTSA ODI #11589473

Mileage unknown · Nov 29, 2023
Air BagsCrashInjury

My brother was driving his car and it was involved in a hard right front impact yesterday after a young girl pulled out in front of him. None of the airbags went off, severe front end damage on the right side to the fender, wheel, axle, radiator, hood, oil pan, and other front end components.The right front wheel is completely b…

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My brother was driving his car and it was involved in a hard right front impact yesterday after a young girl pulled out in front of him. None of the airbags went off, severe front end damage on the right side to the fender, wheel, axle, radiator, hood, oil pan, and other front end components.The right front wheel is completely bent and the right front tire blew out. Front right headlight completely missing. Incident happened going approximately 30-40 MPH. Thankfully he’s okay, but the car is most likely totaled. The steering wheel airbag did NOT deploy and the right curtain airbag did NOT deploy. My brother could have gotten killed. Thankfully he’s only complaining about leg pain and chest pain, but the steering wheel airbag would’ve mitigated his injuries. A few years ago, he got sideswiped very hard on the left side and the vehicle needed 2 new doors and a rear bumper. The left side curtain airbags did not deploy in this scenario either. I’m very disappointed in Toyota that they built a death trap such as the 2018 Corolla.

NHTSA ODI #11557369

Mileage unknown · Sep 17, 2023
Air BagsUnknown Or Other

Hello, I hope that my message will find you in the right clothes. We have not had any accidents until now, because I drive carefully.

NHTSA ODI #11545054

100,555 miles · Jun 6, 2022
Air BagsCrashInjury

The contact owned a 2018 Toyota Corolla. The contact stated that while driving at 60 MPH in inclement weather, the brakes failed to stop the vehicle and she lost control of the vehicle. The vehicle crashed into the median and was spinning before another vehicle crashed into the contact's front end. The air bags were not deployed…

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The contact owned a 2018 Toyota Corolla. The contact stated that while driving at 60 MPH in inclement weather, the brakes failed to stop the vehicle and she lost control of the vehicle. The vehicle crashed into the median and was spinning before another vehicle crashed into the contact's front end. The air bags were not deployed upon impact. The contact suffered soreness in her arms, legs, and back; however, no medical attention was received. A police report was not filed. The vehicle was towed to an auto collision center and deemed totaled by the insurance company. The manufacturer was made aware of the failure and a case was opened. The failure mileage was 100,555.

NHTSA ODI #11467754

Mileage unknown · Mar 1, 2022
Air BagsCrashInjury

My daughter was in an accident on 2/28/2022 at 20 plus miles and hour. It was a front end collision where the air bags did not deploy.

NHTSA ODI #11454705

25 miles · Mar 1, 2021
Air BagsFuel/propulsion SystemFireInjury

MY CAR HAD EARLY SIGNS OF PROBLEMS WITHIN ONLY THE SECOND YEAR. IT HAD STOPPED TWO TIMES. IF THIS CAR STOPS BEFORE THE 18,000 OR LEMON LAW RETURN IT. I THEN WAS NOTIFIED THAT IT HAD 3 RECALLS. MY CAR WAS ACTUALLY STILL DRIVEABLE. I ALSO WANT TO DISCLOSE THAT I DEALL WITH ENVIROMENTAL ALLERGIES. I HAD THE VEHICLE FIXED SEVERAL TI…

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MY CAR HAD EARLY SIGNS OF PROBLEMS WITHIN ONLY THE SECOND YEAR. IT HAD STOPPED TWO TIMES. IF THIS CAR STOPS BEFORE THE 18,000 OR LEMON LAW RETURN IT. I THEN WAS NOTIFIED THAT IT HAD 3 RECALLS. MY CAR WAS ACTUALLY STILL DRIVEABLE. I ALSO WANT TO DISCLOSE THAT I DEALL WITH ENVIROMENTAL ALLERGIES. I HAD THE VEHICLE FIXED SEVERAL TIMES WITH NO PROBLEM. HOWEVER, AFTER THE RECALLS WERE FIXED WITH THE FUEL PUMP AND AIR BAG I STARTED TO BECOME EXTREMLY ILL . I EVER PURCHASED A VOC MONITOR AND WAS ABLET TO DETECT GAS AT DANGEROUS LEVELS. MY DEALER TOYOTA BOWIE AND THE MANUFACTURER DID LITTLE TO NOTHING TO ACCOMODATE ME. I WILL NEVER BUY ANOTHER TOYOTA AGAIN, OR A CAR PERIOD UNLESS I CAN PAY FOR IT IN CASH UPFRONT. THE VEHICLES VOC TURNED DANGEROUS AFTER TURNING ON THE CAR FOR 10MINUTES STRAIGHT.

NHTSA ODI #11398510

19,391 miles · Nov 17, 2020
Air BagsElectrical SystemSeat Belts

TL* THE CONTACT OWNS A 2018 TOYOTA COROLLA. THE CONTACT STATED WHILE DRIVING 50 MPH, THE AIR BAGS AND REAR SEAT BELTS WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER TOYOTA OF DOWNTOWN LA. (1901 S FIGUEROA ST, LOS ANGELES, CA 90007, (213) 986-2011) HOWEVER, THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. T…

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TL* THE CONTACT OWNS A 2018 TOYOTA COROLLA. THE CONTACT STATED WHILE DRIVING 50 MPH, THE AIR BAGS AND REAR SEAT BELTS WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER TOYOTA OF DOWNTOWN LA. (1901 S FIGUEROA ST, LOS ANGELES, CA 90007, (213) 986-2011) HOWEVER, THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE FAILURE RECURRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 19,391. *LN*JB

NHTSA ODI #11375105

4,300 miles · Oct 20, 2020
Air BagsCrash

SAFETY RECALL WORK ON THE AIRBAGS/SEAT BELTS WAS PERFORMED AT CITY TOYOTA, DALY CITY ON 6-16-20. ON 9-9-20 I WAS HEADING HOME FROM THE BANK, DID NOT FEEL WELL, LOST CONTROL OF THE CAR AND RAN OVER A ROAD DIVIDER ISLAND CURB AT THE INTERSECTION OF LAKE MERCED BLVD. AND SKYLINE BLVD., S.F. AT AROUND 5 PM. THE FRONT AIR BAGS DID NO…

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SAFETY RECALL WORK ON THE AIRBAGS/SEAT BELTS WAS PERFORMED AT CITY TOYOTA, DALY CITY ON 6-16-20. ON 9-9-20 I WAS HEADING HOME FROM THE BANK, DID NOT FEEL WELL, LOST CONTROL OF THE CAR AND RAN OVER A ROAD DIVIDER ISLAND CURB AT THE INTERSECTION OF LAKE MERCED BLVD. AND SKYLINE BLVD., S.F. AT AROUND 5 PM. THE FRONT AIR BAGS DID NOT DEPLOY WHEN I THINK THEY SHOULD HAVE IS WHAT I AM REPORTING HERE. EVERYTHING FROM THE HOOD DOWN WAS RIPPED OFF THE CAR, NAMELY, THE HEAD LIGHTS, GRILL, TOYOTA EMBLEM, BUMPER, RADIATOR, AND PART OF THE AC SYSTEM. I WAS THE ONLY PERSON IN THE CAR, HAD MY SEAT BELT ON, AND WAS NOT INJURED, AND LUCKILY DID NOT HIT ANY PEOPLE OR ANOTHER VEHICLE. A LADY WHO WITNESSED THE ACCIDENT CALLED AN AMBULANCE (KING-AMERICAN AMBULANCE CO.), S.F. POLICE AND A TOW TRUCK. AAA AUTOMOBILE INSURANCE COMPANY INITIALLY DECLARED THE CAR A TOTAL LOSS (CLAIM #[XXX]) AND THEN OVER A MONTH LATER ON 10-15-20 THEY E-MAIL SAYING THE CAR HAD BEEN DEEMED REPAIRABLE AFTER ALL. NOW, THE CAR IS BEING TOWED TO PIERRE'S AUTO BODY, 1349 NINTH AVENUE, SAN FRANCISCO CA 94122, TEL. (415) 564-0900 AND THE REPAIR WORK IS SCHEDULED TO BEGIN ON THIS FRIDAY MORNING 10-23-20. THE OWNER OF THE SHOPS NAME IS [XXX], AND THE ESTIMATE IS A WHOPPING $8,473.45 DOLLARS. IF THIS REPORT IS REVIEWED SOON ENOUGH, I THINK THE VEHICLE SHOULD BE INSPECTED BY YOUR AGENCY BEFORE REPAIRS BEGIN AND TELL ME WHAT YOU THINK? THE AAA INSURANCE CLAIM ADJUSTERS NAME IS [XXX] AND CAN BE REACHED AT [XXX]. THANK YOU FOR LOOKING INTO THIS SITUATION. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

NHTSA ODI #11365477

60,000 miles · Aug 24, 2020
Air BagsFuel System, Gasoline

TL* THE CONTACT OWNS A 2018 TOYOTA COROLLA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBERS: 20V024000 (AIR BAGS) AND 20V012000 (FUEL SYSTEM, GASOLINE). THE VEHICLE WAS TAKEN TO THE TOYOTA OF BOWIE DEALER LOCATED AT 16700 GOVERNOR BRIDGE RD, BOWIE, MD 20716, WHERE THE RECALLS WERE REPAIRED. THE CONTACT STATED AFTER …

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TL* THE CONTACT OWNS A 2018 TOYOTA COROLLA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBERS: 20V024000 (AIR BAGS) AND 20V012000 (FUEL SYSTEM, GASOLINE). THE VEHICLE WAS TAKEN TO THE TOYOTA OF BOWIE DEALER LOCATED AT 16700 GOVERNOR BRIDGE RD, BOWIE, MD 20716, WHERE THE RECALLS WERE REPAIRED. THE CONTACT STATED AFTER THE REPAIRS, SHE STARTED FEELING DIZZY AND NAUSEATED, HAVING MIGRAINE HEADACHES. THE DEALER WAS CALLED BACK AND THE TECHNICIAN WAS UNABLE TO DETECT THE CAUSE OF THE ISSUE. THE CONTACT PURCHASED AN AIR QUALITY DETECTOR AND DETECTED A VOC (VOLATILE ORGANIC COMPOUND) OF .975MG (WITHIN 15 MINUTES OF RUNNING THE VEHICLE) WHICH WAS OVER EPA RECOMMENDATION. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND WAS TOLD THAT SOMEONE WOULD CALL BACK. THE CONTACT WAS NOT CALLED BACK. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 60,000.*DT *JS

NHTSA ODI #11351018

Official recalls

3

20V024000 · Air Bags: Air Bag/restraint Control Module

Jan 17, 2020

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2011-2019 Corolla, 2011-2013 Matrix, 2012-2018 Avalon, and 2013-2018 Avalon Hybrid vehicles. During certain crashes, the air bag electronic control unit (ECU) may malfunction, possibly disabling the deployment of the air bags and/or seat belt pretensioners.

Consequence & remedy

Consequence: In the event of a crash, air bags and/or seat belt pretensioners that do not deploy as intended may increase the risk of injury.

Remedy: Toyota will notify owners, and dealers will inspect the ECU and install a noise filter between the air bag control module and its wire harness, as necessary, free of charge. Owners were notified of the safety risk beginning March 2, 2020. A second letter notifying owners of the remedy repair will be mailed between March 16, 2020 and June 27, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's numbers for this recall are 20TB03, 20TA03 and 20TA05.

20V012000 · Fuel System, Gasoline:delivery:fuel Pump

Jan 13, 2020

Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 4Runner, Highlander, Camry, Land Cruiser, Sequoia, Sienna, Tacoma and Tundra, and Lexus RC 300, RC 350, GS 350, GX 460, IS 300, LC 500, LS 500, LX 570, RX 350L, and 2019 Toyota Avalon and Corolla, and certain Lexus NX 300, and ES 350 vehicles on January 13, 2020. On March 4, 2020, Toyota expanded the recall to include certain 2014-2015 Toyota 4Runner and Land Cruiser, 2018 Avalon, Corolla, 2014 FJ Cruiser, 2017 Sienna and Lexus 2018 ES 350, 2018-2019 GS 300, 2013-2014 GS350, 2014-2015 GX 460, IS 350 and LX 570, 2014 IS F, 2018-2019 IS 350, LC 500H and LS 500H, 2013-2015 LS 460, 2015 NX 200T and RC350, 2017 RC 200T and RX 350. Toyota also removed the 2018-2019 Toyota 4Runner and Land Cruiser and 2018-2019 Lexus GX 460 and LX 570 and 2019 NX300 from inclusion in this recall. On March 19, 2020, Toyota expanded the recall to include 2015 Lexus GS350 vehicles. The low-pressure fuel pump inside the fuel tank may fail.

Consequence & remedy

Consequence: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.

Remedy: Toyota will notify owners, and dealers will replace the fuel pump, free of charge. The recall began May 4, 2020. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Toyota's numbers for this recall are 20TB02 and 20TA02 for Toyota vehicles and 20LB01 and 20LA01 for Lexus vehicles.

19V503000 · Equipment:other:labels

Jun 28, 2019

Southeast Toyota Distributors, LLC (SET) is recalling certain 2017-2019 Toyota Camry, Corolla, Rav4, Sienna, and Yaris iA vehicles equipped with factory-installed floor mats. The load carrying capacity modification label may be incorrect. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Consequence & remedy

Consequence: An incorrect label may lead to unintentionally overloading the vehicle, increasing the risk of a crash.

Remedy: SET will notify owners and provide a corrected label for placement over the inaccurate label, free of charge. The recall began August 23, 2019. Owners may contact Toyota customer service at 1-888-270-9371. SET's number for this recall is SET19A.

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

2

EA21002 · Desiccated Air Bag Inflator Rupture

Opened Sep 17, 2021 · No close date supplied

Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Additional source detail variants (2)

Air Bags:frontal:driver Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

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.

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