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2014 Acura Rlx

Owner reports · Recalls · Investigations

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There is not enough comparable history to draw a useful model-year comparison.

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

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When problems were reported

Mileage at the reported incident

51 reports with mileage · 33 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.

  • Steering. Review the 49 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Suspension. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electronic Stability Control (esc). Review the 12 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

1 crash reports0 fire reports0 injury reports

Suspension complaints

17 reports
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Mileage unknown · Sep 1, 2026
SteeringSuspension

My 2014 Acura RLX has experienced a severe failure of the Precision All-Wheel Steer (P-AWS) Rear Toe Control (RTC) Actuators. The vehicle and its components are currently located at the Hiley Acura of Fort Worth dealership and are fully available for inspection. Safety Risk: This failure causes dangerous rear-end fish-tailing, v…

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My 2014 Acura RLX has experienced a severe failure of the Precision All-Wheel Steer (P-AWS) Rear Toe Control (RTC) Actuators. The vehicle and its components are currently located at the Hiley Acura of Fort Worth dealership and are fully available for inspection. Safety Risk: This failure causes dangerous rear-end fish-tailing, violent swaying, and completely unpredictable steering control at highway speeds, creating an immediate crash risk for myself and other drivers. Confirmation & Inspection: The problem first appeared on July 8, 2026. Upon failure, the instrument panel immediately lit up with every available indicator light and continuously rotated through all system warnings. I captured video evidence of this total dashboard cascade and presented it directly to the dealership. The authorized dealer, Hiley Acura, inspected the vehicle but misdiagnosed the symptom. They incorrectly charged me $455 to replace a steering angle sensor and bundled it into a total bill of $3,808.63 heavily loaded with elective maintenance items. Upon a secondary inspection after the issue persisted, Hiley Acura officially confirmed that the RTC actuators have failed and match corporate Service Bulletin #23-021. Acura Corporate Client Relations has officially reviewed the inspection data but closed my case, refusing financial remedy. This vehicle remains completely unsafe to operate and serves as my critical medical transport for ALS.

NHTSA ODI #11761406

Mileage unknown · Nov 5, 2025
Suspension

Rear toe actuator (PAWS system) failure causes steering instability, warning lights, and loss of control during cornering. Acura denied warranty coverage despite a known defect and VIN-based extension (TSB 23-021, 23-022).

NHTSA ODI #11697542

176,000 miles · May 27, 2025
Suspension

The contact owns a 2014 Acura RLX. The contact stated that while driving 40 MPH in the rain, the vehicle started to fishtail, with several unknown warning lights illuminated. The vehicle was towed to a dealer where it was diagnosed that the passenger’s side rear toe control actuator had failed and needed to be replaced. The vehi…

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The contact owns a 2014 Acura RLX. The contact stated that while driving 40 MPH in the rain, the vehicle started to fishtail, with several unknown warning lights illuminated. The vehicle was towed to a dealer where it was diagnosed that the passenger’s side rear toe control actuator had failed and needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was not made aware of the failure. The failure mileage was 176,000.

NHTSA ODI #11663127

Mileage unknown · Apr 9, 2025
SteeringSuspension

The vehicle is equipped with rear wheel steering which is executed through a toe actuator device in the suspension attached to each rear wheel. The actuators are malfunctioning on my vehicle, causing it to swerve while driving on multiple occasions. The vehicle swerved in a fashion taking it out it its lane and could easily hav…

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The vehicle is equipped with rear wheel steering which is executed through a toe actuator device in the suspension attached to each rear wheel. The actuators are malfunctioning on my vehicle, causing it to swerve while driving on multiple occasions. The vehicle swerved in a fashion taking it out it its lane and could easily have put the vehicle into oncoming traffic with zero steering input from the driver. This is a very serious safety issue and vehicles with this equipment should be recalled for repair in my opinion. Acura is aware of the problem and did extend the warranties on the vehicles to cover the issue, but the extension ended in 2024. I spoke with Acura customer service at their US headquarters in Torrance, CA and their response was that they no longer cover this repair but acknowledge that it is a serious safety concern with the vehicle. My local Acura dealer charges approximately $7,000 to repair the problem and I will attach the estimate.

NHTSA ODI #11653772

Mileage unknown · Mar 15, 2024
Suspension

See attached document for complaint

NHTSA ODI #11577597

Mileage unknown · Jan 2, 2023
SteeringSuspension

While my wife was driving my RLX I left my neighborhood and made a right turn onto the main road, while on the main road the PAWS system malfunctioned and the vehicle "Fishtailed" causing the vehicle to swerve violently, steering turned violently as well and instrument cluster illuminated with multiple warning lights. PAWS syste…

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While my wife was driving my RLX I left my neighborhood and made a right turn onto the main road, while on the main road the PAWS system malfunctioned and the vehicle "Fishtailed" causing the vehicle to swerve violently, steering turned violently as well and instrument cluster illuminated with multiple warning lights. PAWS system malfunctioned/failed (its available for inspection) The safety of my wife and son was put at risk as this could have caused a crash/accident The problem has been confirmed The vehicle component has been inspected and scanned for codes Codes U0122-00, U0155-00, U0029-00, 27-21, 86-23, U129D-00, U0416-68, U126-00, U0100-00, U0101-00, C1600-94, U129D, and U1281. No prior warning lamps,messages or symptoms indicating a problem with system or vehicle This issue happened on Saturday December 10, 2022. How is this not a recall? Did a google research on the condition and multiple reports of these vehicles equipped with the PAWS system "Fishtailing" when the rear steering actuators malfunction.

NHTSA ODI #11499832

Mileage unknown · Dec 5, 2021
Electrical SystemSuspension

Had starter replaced on my vehicle and still doing the same thing it was doing before. I click the push to start button and just get a grinding noise or sometime nothing will happen. I been reading forms and a lot of Rlx owners are reporting the same issue. Other problem I’m having with the vehicle is the Paws system can feel th…

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Had starter replaced on my vehicle and still doing the same thing it was doing before. I click the push to start button and just get a grinding noise or sometime nothing will happen. I been reading forms and a lot of Rlx owners are reporting the same issue. Other problem I’m having with the vehicle is the Paws system can feel the car wanting to kick out in the rear wheels feel like they are turning when I’m going straight

NHTSA ODI #11442746

89,750 miles · May 10, 2021
Power TrainSteeringSuspension

. I HAVE A 2014 RLX WITH PAWS. AFTER TURNING LEFT I HAVE A PROBLEM WHERE THE REAR WHEELS TURN WHILE THE CAR WAS GOING STRAIGHT DOWN A STREET CAUSING THE REAR END TO KICK OUT, KIND OF LIKE WHAT HAPPENS TO THE REAR WHEELS WHEN DRIVING A CAR LOSING TRACTION WHILE TURNING ON A WET SURFACE.

NHTSA ODI #11415769

80,000 miles · Jul 27, 2020
SteeringSuspension

WHEN MAKING A LEFT HANDED TURN AT LOW SPEED, CAR MAKES A MOAN SOUNDS COMING FROM THE REAR COMPLETELY THROWING OF THE WHEEL ALIGNMENT AND THE ABILITY TO CONTROL THE STEERING OF THE CAR. RESEARCHED AND APPEARS TO BE A COMMON PROBLEM WITH THE REAR TOE ACTUATOR NEEDING TO BE REPLACED. ACURA HAS THIS RECOGNIZED AS A SERVICE ISSUE ( …

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WHEN MAKING A LEFT HANDED TURN AT LOW SPEED, CAR MAKES A MOAN SOUNDS COMING FROM THE REAR COMPLETELY THROWING OF THE WHEEL ALIGNMENT AND THE ABILITY TO CONTROL THE STEERING OF THE CAR. RESEARCHED AND APPEARS TO BE A COMMON PROBLEM WITH THE REAR TOE ACTUATOR NEEDING TO BE REPLACED. ACURA HAS THIS RECOGNIZED AS A SERVICE ISSUE ( SERVICE BULLETIN 13-041) WITH 2014 ACURA RLX MODELS PLEASE HELP REMEDY THIS SITUATION. A FULL RECALL IS NEEDED. LIVES ARE AT STAKE!!!

NHTSA ODI #11341695

50,000 miles · Sep 16, 2019
SteeringSuspension

WHILE DRIVING AND TURNING LEFT OR RIGHT THE CAR FEELS LIKE THE BACKEND IS COMING AROUND TO THE FRONT OF CAR, THEN I HAVE TO HOLD THE STEERING WHILE TIGHT BECAUSE IT FEELS LIKE I'M GONNA LOOSE CONTROL OF THE CAR THEN IT'LL STRAIGHTEN BACK UP. I CAN BE DRIVING ON THE STREETS OR ON THE HIGHWAY THE SAME THING. AND SINCE I'VE HAD THE…

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WHILE DRIVING AND TURNING LEFT OR RIGHT THE CAR FEELS LIKE THE BACKEND IS COMING AROUND TO THE FRONT OF CAR, THEN I HAVE TO HOLD THE STEERING WHILE TIGHT BECAUSE IT FEELS LIKE I'M GONNA LOOSE CONTROL OF THE CAR THEN IT'LL STRAIGHTEN BACK UP. I CAN BE DRIVING ON THE STREETS OR ON THE HIGHWAY THE SAME THING. AND SINCE I'VE HAD THE CAR IT HAS HAD A ROARING NOISE IN THE REAR END AND I HAVE BOUGHT NEW TIRES AND EVERY SHOP I HAVE TAKEN IT TO THEY SAY IT'S THE TIRES BUT I KNOW THAT'S NOT SO.

NHTSA ODI #11255818

Official recalls

5

23V858000 · Fuel System, Gasoline:delivery:fuel Pump

Dec 18, 2023

Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda Accord Hybrid, Pilot, Acura NSX vehicles. The fuel pump inside the fuel tank may fail.

Consequence & remedy

Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy: Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are KGC and KGD. This recall is an expansion of NHTSA recall numbers 21V-215 and 20V-314.

15V301000 · Forward Collision Avoidance: Crash Imminent Braking

May 20, 2015

Honda (American Honda Motor Co.) is recalling certain model year 2014-2015 Acura MDX 2WD and AWD, RLX and 2014 Acura RLX Hybrid vehicles. In certain driving conditions, the Collision Mitigation Braking System (CMBS) may incorrectly interpret certain roadside objects such as metal fences or metal guardrails as obstacles and unexpectedly apply the brakes.

Consequence & remedy

Consequence: If the CMBS unexpectedly applies emergency braking force while driving, there is an increased risk of a crash.

Remedy: Honda will notify owners, and dealers will update the CMBS software, free of charge. The recall began on July 6, 2015. Owners may contact Acura customer service at 1-800-382-2238. Honda's numbers for this recall is JQ4, JQ5 and JQ6.

14V792000 · Exterior Lighting:headlights

Dec 16, 2014

American Honda Motor Co. (Honda) is recalling certain model year 2014 Acura RLX vehicles manufactured November 22, 2012, to January 30, 2014, 2015 Acura RLX vehicles manufactured June 4, 2014, to November 18, 2014, and 2014 Acura RLX Hybrid vehicles manufactured November 5, 2013, to July 25, 2014. An aluminum film applied to the inner reflector of the headlight may experience adhesion issues causing the film to delaminate. Thus, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108, "Lamps, reflective devices, and associated equipment."

Consequence & remedy

Consequence: Delamination of the aluminum film may diminish output of the headlight, increasing the risk of a vehicle crash.

Remedy: Honda will notify owners, and dealers will replace both of the headlights, free of charge. The recall began February 2, 2015. Owners may contact Honda customer service at 1-310-783-2000. Honda's number for this recall is JN2.

14V639000 · Seat Belts

Oct 10, 2014

American Honda Motor Company (Honda) is recalling certain model year 2014-2015 Acura MDX vehicles manufactured April 23, 2013, to August 25, 2014, and 2014 Acura RLX vehicles manufactured November 5, 2012, to November 25, 2013. In the affected vehicles, the driver and front passenger seat belt may not extend or retract in low temperatures.

Consequence & remedy

Consequence: A seatbelt that does not function increases the risk of injury in a crash.

Remedy: Honda has notified owners, and dealers will replace the driver and front passenger seat belts, free of charge. The recall began in November 2014. Owners may contact Acura customer service at 1-800-382-2238. Honda's number for this recall is JK7 for the MKX, and JK8 for the RLX.

13V622000 · Suspension:rear

Dec 16, 2013

American Honda Motor Company (Honda) is recalling certain model year 2014 Acura RLX vehicles manufactured August 7, 2012, through November 5, 2013. The bolts that attach the rear lower control arms to the sub-frame of the vehicle may have loosened during transport to dealerships.

Consequence & remedy

Consequence: Loose rear lower control arm bolts may reduce steering ability, increasing the risk of a crash.

Remedy: Honda will notify owners, and dealers will replace the rear suspension lower control arm bolts, free of charge. The recall is expected to begin in early January 2014. Customers may contact Honda at 1-800-999-1009. Honda's number for this recall is JD0.

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.