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2012 Fiat 500

Owner reports · Recalls · Investigations

Limited comparison data

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

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When problems were reported

Mileage at the reported incident

289 reports with mileage · 106 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.

  • Power Train. Review the 200 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 63 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 51 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

21 crash reports4 fire reports16 injury reports

Power Train complaints

200 reports
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95,000 miles · Sep 9, 2015
Power Train

TL* THE CONTACT OWNS A 2012 FIAT 500. WHILE DRIVING APPROXIMATELY 45 MPH, THE GEAR WAS NOT ABLE TO SHIFT FROM THE FOURTH GEAR. VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE FINGER PLATE ON THE CLUTCH WAS CRACKED AND THE CLUTCH WOULD NOT DISENGAGE. THE VEHICLE WAS REPAIRED BUT THE REMEDY FAILED. THE…

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TL* THE CONTACT OWNS A 2012 FIAT 500. WHILE DRIVING APPROXIMATELY 45 MPH, THE GEAR WAS NOT ABLE TO SHIFT FROM THE FOURTH GEAR. VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE FINGER PLATE ON THE CLUTCH WAS CRACKED AND THE CLUTCH WOULD NOT DISENGAGE. THE VEHICLE WAS REPAIRED BUT THE REMEDY FAILED. THE PART FOR THE REPAIR WAS ORDERED BUT IT WAS DISCOVERED THAT THE CLUTCH ASSEMBLY WAS ALREADY CRACKED BEFORE USE. THE PART WAS REORDERED AND THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 95,000.

NHTSA ODI #10762694

20,000 miles · Sep 4, 2015
Power Train

PULLED UP TO A STOP LIGHT, DEPRESSED CLUTCH AND SHIFTED TO NEUTRAL. WHEN LIGHT TURNED GREEN, I DEPRESSED THE CLUTCH AND IT LOCKED UP AND WOULD NOT ENGAGE ALLOWING ME TO SHIFT INTO A GEAR. MECHANIC SAID ITS A BENT PRESSURE PLATE AND THE ENTIRE CLUTCH ASSY. NEEDS REPLACED FOR ~$2,000. OBVIOUSLY BENDING OF THE PRESSURE PLATE IS NOT…

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PULLED UP TO A STOP LIGHT, DEPRESSED CLUTCH AND SHIFTED TO NEUTRAL. WHEN LIGHT TURNED GREEN, I DEPRESSED THE CLUTCH AND IT LOCKED UP AND WOULD NOT ENGAGE ALLOWING ME TO SHIFT INTO A GEAR. MECHANIC SAID ITS A BENT PRESSURE PLATE AND THE ENTIRE CLUTCH ASSY. NEEDS REPLACED FOR ~$2,000. OBVIOUSLY BENDING OF THE PRESSURE PLATE IS NOT "NORMAL WEAR AND TEAR" AND ITS ALSO VERY RARE TO HAVE A CLUTCH FAIL SO EARLY (20,000 MILES). UNFORTUNATELY FIAT IS SAYING THIS IS A NORMAL WEAR AND TEAR ISSUE AND IS NOT COVERED UNDER WARRANTY. READING THE FORUMS, THIS SEEMS TO BE A VERY COMMON PROBLEM WITH MANUAL SHIFT FIATS AND IS A TERRIBLE SAFETY HAZARD (THINK IF THE CLUTCH LOCKED UP AT HIGHWAY SPEEDS PREVENTING SOMEONE FROM SHIFTING OUT OF GEAR). THIS PART SHOULD BE RECALLED AND REPLACED ON ALL MANUAL TRANSMISSION FIATS AND COSTS FULLY COVERED.

NHTSA ODI #10761550

6,000 miles · Aug 24, 2015
EnginePower Train

THE CAR GOT STUCK WITH MUD UNDER THE CAR. WHEN WE GO IT PULLED OUT AND TOOK IT TO THE DEALER WOULD HAVE COST US 3000 TO HAVE IT FIXED. THAT WAY TO MUCH AND THEY TOLD THERE WAS PROBLEM WITH THE ENGINE NOW. THEY WOULDN'T WORK A DEAL ON IT. WHEN DRIVING HOME WE NOTICED THRY LEFT A PLATE FROM UNDER THE STERLING WILL AND HAD RIP THE…

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THE CAR GOT STUCK WITH MUD UNDER THE CAR. WHEN WE GO IT PULLED OUT AND TOOK IT TO THE DEALER WOULD HAVE COST US 3000 TO HAVE IT FIXED. THAT WAY TO MUCH AND THEY TOLD THERE WAS PROBLEM WITH THE ENGINE NOW. THEY WOULDN'T WORK A DEAL ON IT. WHEN DRIVING HOME WE NOTICED THRY LEFT A PLATE FROM UNDER THE STERLING WILL AND HAD RIP THE BLACK PEACE THAT WRAPES OROUND IT.WE TO IT TO A TRAMISSION PLACE IN TOWN WHERE THEY FIXED THE TRANSMISSIN , THE CAR DRIVE LIKE A MESS I JUST AFRAID TO GO LOMG DISTANCE.

NHTSA ODI #10758772

29,623 miles · Jul 21, 2015
Power Train

TL* THE CONTACT OWNS A 2012 FIAT 500. WHILE DRIVING AT 35 MPH, THE GEAR SHIFTER FAILED TO SHIFT INTO THIRD GEAR. IN ADDITION, THE CONTACT ATTEMPTED TO SHIFT BACK TO THE SECOND GEAR AND THE GEAR SHIFTER FAILED TO SHIFT BUT REMAINED BETWEEN THE SECOND AND THE THIRD GEAR. AS A RESULT, THE VEHICLE FAILED TO MOVE FORWARD. THE FAILURE…

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TL* THE CONTACT OWNS A 2012 FIAT 500. WHILE DRIVING AT 35 MPH, THE GEAR SHIFTER FAILED TO SHIFT INTO THIRD GEAR. IN ADDITION, THE CONTACT ATTEMPTED TO SHIFT BACK TO THE SECOND GEAR AND THE GEAR SHIFTER FAILED TO SHIFT BUT REMAINED BETWEEN THE SECOND AND THE THIRD GEAR. AS A RESULT, THE VEHICLE FAILED TO MOVE FORWARD. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TAKEN TO A DEALER WHO DIAGNOSED THAT THE CLUTCH NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 29,623.

NHTSA ODI #10735562

500 miles · May 25, 2015
Electrical SystemPower TrainUnknown Or Other

WITHIN SEVERAL WEEKS AFTER PURCHASE OF FIAT 500 WE ENCOUNTERED A PROBLEM STARTING THE ENGINE. UPON TURNING THE IGNITION KEY THE ENGINE RESPONDED WITH AN ELECTRICAL MOTOR WHINE BUT DID NOT START. AFTER SEVERAL REPEATED ATTEMPTS THE ENGINE WOULD START AND FUNCTION NORMALLY. GAS MILEAGE HAS NEVER BEEN AS HIGH WAS REPRESENTED IN …

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WITHIN SEVERAL WEEKS AFTER PURCHASE OF FIAT 500 WE ENCOUNTERED A PROBLEM STARTING THE ENGINE. UPON TURNING THE IGNITION KEY THE ENGINE RESPONDED WITH AN ELECTRICAL MOTOR WHINE BUT DID NOT START. AFTER SEVERAL REPEATED ATTEMPTS THE ENGINE WOULD START AND FUNCTION NORMALLY. GAS MILEAGE HAS NEVER BEEN AS HIGH WAS REPRESENTED IN SALES INFORMATION. THE VEHICLE HAS BEEN RETURNED TO THE DEALER MULTIPLE TIMES FOR CORRECTION BUT THE DEALER HAS BEEN UNABLE TO DIAGNOSE THE PROBLEM. A COMPLAINT HAS BEEN LODGED WITH BOTH THE DEALER AND FIAT USA.

NHTSA ODI #10721300

28,000 miles · Apr 7, 2015
Power Train

I WAS AT A BUSY INTERSECTION ABOUT TO MAKE A LEFT HAND TURN WHEN I SUDDENLY WAS UNABLE TO DEPRESS THE CLUTCH COMPLETELY OR SHIFT INTO GEAR. IT TURNED OUT THE CLUTCH HAD COMPLETELY GIVEN OUT WITH NO WARNING - NO SLIPPING, SMELL OF BURNING CLUTCH, NO CHECK ENGINE LIGHT, NOTHING. I'VE DRIVEN STICK MY WHOLE LIFE AND NEVER RUN THRO…

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I WAS AT A BUSY INTERSECTION ABOUT TO MAKE A LEFT HAND TURN WHEN I SUDDENLY WAS UNABLE TO DEPRESS THE CLUTCH COMPLETELY OR SHIFT INTO GEAR. IT TURNED OUT THE CLUTCH HAD COMPLETELY GIVEN OUT WITH NO WARNING - NO SLIPPING, SMELL OF BURNING CLUTCH, NO CHECK ENGINE LIGHT, NOTHING. I'VE DRIVEN STICK MY WHOLE LIFE AND NEVER RUN THROUGH A CLUTCH IN 28,000 MILES! NOR HAVE I HAD THE EXPERIENCE OF A CLUTCH GOING OUT WITHOUT WARNING - IT HAS ALWAYS STARTED TO SLIP IN ADVANCE OF NEEDING REPLACED. THE POLICE HAD TO STOP TRAFFIC AND PUSH ME TO SAFETY AS THE CAR WOULD NOT DRIVE AT ALL. I DON'T KNOW WHAT I WOULD HAVE DONE IF THE POLICE HAD NOT COME SO QUICKLY AS I WAS IN AN AREA WITH A LOT OF TRAFFIC AND SEVERAL PEOPLE NEARLY HIT ME IN THE SHORT TIME I WAS WAITING. DUE TO THE OUT OF THE BLUE NATURE OF THIS CLUTCH FAILURE, I THOUGHT IT WAS WORTH REPORTING AS A SAFETY ISSUE. HAD I BEEN ON A FREEWAY, THE SITUATION COULD HAVE BEEN MUCH WORSE. *TR

NHTSA ODI #10704281

22,819 miles · Mar 9, 2015
Power Train

PURCHASED 2012 YEAR FIAT 500C ON 10/31/2011. AS OF MARCH 3, 2014 PUT 22819 MILES ON CAR. THIS IS A 5 SPEED MANUAL TRANSMISSION MODEL. ON MARCH THIRD THE CLUTCH GAVE OUT. WAS TOLD BY FIAT THIS WASN'T AN WARRANTY ITEM, ALTHOUGH THE WINDOW STICKER SAYS 4 YEAR / 50,000 MILE WARRANTY. THEY ALSO SAY FREE ROADSIDE ASSISTANCE FOR 4 YEAR…

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PURCHASED 2012 YEAR FIAT 500C ON 10/31/2011. AS OF MARCH 3, 2014 PUT 22819 MILES ON CAR. THIS IS A 5 SPEED MANUAL TRANSMISSION MODEL. ON MARCH THIRD THE CLUTCH GAVE OUT. WAS TOLD BY FIAT THIS WASN'T AN WARRANTY ITEM, ALTHOUGH THE WINDOW STICKER SAYS 4 YEAR / 50,000 MILE WARRANTY. THEY ALSO SAY FREE ROADSIDE ASSISTANCE FOR 4 YEARS / UNLIMITED MILES BUT SINCE I REFUSED TO ALLOW THEM TO TAKE THIS CAR 18 MILES TO A FIAT DEALER AND ONLY 1.4 MILES TO MY LOCAL MECHANIC I HAD TO PAY OUT OF POCKET FOR TOWING. I PAID OUT OF POCKET APROX $2,000 INCLUDING, CAR RENTAL, TOWING AND A $1,772.45 REPAIR BILL. PER THE MECHANIC THE CLUTCH DISC ITSELF WAS IN EXCELLENT CONDITION, BUT THE CLUTCH PRESSURE PLATE WAS AT FAULT. FROM MY OWN PERSONAL EXPERIENCE OF RESTORING A FEW OLD CARS AND MOTORCYCLES OVER THE YEARS, THIS IS PRETTY UNHEARD OF A CLUTCH PRESSURE PLATE FAILING BEFORE THE ACTUAL CLUTCH DISC. MY TAKE THERE IS SOME DEFECT WITH THIS CLUTCH PRESSURE PLATE OR THE OVERALL DESIGN OF THE MANUAL CLUTCH. AS OF THIS DATE, I HAVEN'T NEEDED TO REPLACE THE BRAKE PADS ON THIS CAR SO HOW IN THE WORLD SHOULD IT NEED A NEW CLUTCH? THIS IS CRAZY. *TR

NHTSA ODI #10693010

59,000 miles · Feb 16, 2015
Power Train

LAST NIGHT, WHILE PULLING ONTO THE HIGHWAY, MY CLUTCH LOCKED UP. MY CLUTCH HAS NEVER SHOWN ANY SIGN OF WEAR/TEAR (NO GRINDING, NO SLIPPING, NO BURNING, ETC.) AND OUT OF NOWHERE, IT CLAMPED SHUT. THANKFULLY, THERE WAS NOT MUCH TRAFFIC AND I PULLED OVER WITHOUT THE HAZARD OF HITTING/BEING HIT BY ANOTHER CAR. I GOT THE CAR TOWED TO…

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LAST NIGHT, WHILE PULLING ONTO THE HIGHWAY, MY CLUTCH LOCKED UP. MY CLUTCH HAS NEVER SHOWN ANY SIGN OF WEAR/TEAR (NO GRINDING, NO SLIPPING, NO BURNING, ETC.) AND OUT OF NOWHERE, IT CLAMPED SHUT. THANKFULLY, THERE WAS NOT MUCH TRAFFIC AND I PULLED OVER WITHOUT THE HAZARD OF HITTING/BEING HIT BY ANOTHER CAR. I GOT THE CAR TOWED TO FIAT OF ORANGE PARK, AND HAD TO WAIT UNTIL THEY OPENED TODAY TO GET A CALL FROM THEM. I WAS SO CONFUSED BY WHAT COULD HAVE CAUSED MY CLUTCH TO DO THAT, LAST NIGHT I SEARCHED ONLINE AND FOUND FIAT-OWNER FORUMS OF OTHER PEOPLE DESCRIBING THE EXACT SAME INCIDENT HAPPENING TO THEM (ONE GUY WAS IN ATLANTA TRAFFIC AND ALMOST CRASHED, ANOTHER GUY WAS IN NYC ABOUT TO CROSS THE MANHATTAN BRIDGE AND ALMOST GOT INTO A WRECK). THEY ALL HAD, LIKE MYSELF, FIAT'S WITH LOW MILEAGE. SOME HAD 22K MILES, SOME 28KMILES, SOME 50K, SOME 60K; HENCE ADDING TO THE BIZARRE NATURE OF THIS INCIDENT. ALL INCIDENTS RESULTED IN BENT PRESSURE PLATES AS WELL AS MISCELLANEOUS DAMAGE TO CLUTCH PARTS. FIAT OF ORANGE PARK CALLED ME TODAY AND TOLD ME THAT THE DAMAGE IS MY FAULT, AS A RESULT OF WEAR/TEAR. DESPITE ME EXPLAINING TO THEM THAT THIS HAS BEEN AN ISSUE WITH OTHER FIAT-OWNERS, THEY CONTINUED TO SAY THAT I AM RESPONSIBLE FOR THE DAMAGE. DESPITE ALL OF THE EVIDENCE POINTING TOWARDS A MECHANICAL MALFUNCTION, THEY SAID I AM RESPONSIBLE FOR REPAIRING THE CLUTCH. THIS SEEMS TO BE A MANUFACTURER DEFECT AND I WOULD LIKE TO REPORT THIS IN HOPE THAT THERE MIGHT BE ACTION TAKEN BY YOU, NHTSA, TO HELP THE VICTIMS OF THIS DEFECT FROM 1) POTENTIAL HAZARD AS A RESULT OF FUTURE INCIDENTS 2) PAYING THE LARGE AMOUNT FOR REPAIRING THE DAMAGE. THANK YOU FOR YOUR CONSIDERATION. *TR

NHTSA ODI #10683720

12,000 miles · Feb 16, 2015
Power Train

DRIVING AT CITY SPEEDS ~20MPH AT ONLY 12K MILES, CLUTCH PEDAL SUDDENLY BECAME STIFF, AND WAS UNABLE TO SHIFT GEARS. HAD TO HAVE CAR TOWED TO DEALERSHIP WHERE I WAS INFORMED BY THE DEALERSHIP THAT THE CLUTCH HAD FUSED TO THE FLYWHEEL (I DO NOT TRUST THAT THIS WAS AN ACCURATE, COMPLETE DIAGNOSIS). ABOUT 2 YEARS LATER (END OF 07/2…

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DRIVING AT CITY SPEEDS ~20MPH AT ONLY 12K MILES, CLUTCH PEDAL SUDDENLY BECAME STIFF, AND WAS UNABLE TO SHIFT GEARS. HAD TO HAVE CAR TOWED TO DEALERSHIP WHERE I WAS INFORMED BY THE DEALERSHIP THAT THE CLUTCH HAD FUSED TO THE FLYWHEEL (I DO NOT TRUST THAT THIS WAS AN ACCURATE, COMPLETE DIAGNOSIS). ABOUT 2 YEARS LATER (END OF 07/2014) AND ONLY AROUND 35K MILES, WAS DRIVING ON THE INTERSTATE 2 HOURS AWAY FROM HOME ( AT ~65MPH), AND WHEN I EXITED TO GET GAS, THE PEDAL ONCE MORE BECAME INSTANTLY STIFF OUT OF NOWHERE AND WAS NEARLY UNABLE TO GET THE CAR OFF THE ROAD. HAD TO HAVE THE CAR TOWED FROM DEALER TO DEALER UNTIL IT WAS IN MY HOME CITY. THE DEALER THEN AGAIN TOLD ME THAT THE CLUTCH AND FLYWHEEL HAD GONE OUT. *TR

NHTSA ODI #10683627

61,200 miles · Jan 21, 2015
Power Train

FAILED PRESSURE PLATE WITH 2012 FIAT 500. DESIGN FLAW/MATERIALS ISSUE. FIAT IS NOT STANDING BEHIND THEIR PRODUCT, NO MANUAL TRANSMISSION SHOULD HAVE TO BE REPLACED AT 61,000 MILES. *TR

NHTSA ODI #10677117

Official recalls

3

19V817000 · Power Train:automatic Transmission; Power Train:automatic Transmission:lever And Linkage:floor Shift

Nov 15, 2019

Chrysler (FCA US LLC) is recalling certain 2012-2013 Fiat 500 vehicles equipped with 6-speed automatic transmissions. The shifter cable bushing may fail allowing the cable to detach from the transmission.

Consequence & remedy

Consequence: If the shifter cable detaches from the transmission, the transmission may not shift into the gear selected by the driver. Additionally, despite selecting PARK with the shifter, the vehicle may roll away. These scenarios may increase the risk of a crash.

Remedy: Chrysler will notify owners, and dealers will replace the shifter cable adjuster, free of charge. The recall began January 9, 2020. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is VB4.

Additional source detail variants (2)

Power Train:automatic Transmission:lever And Linkage:floor Shift

Chrysler (FCA US LLC) is recalling certain 2012-2013 Fiat 500 vehicles equipped with 6-speed automatic transmissions. The shifter cable bushing may fail allowing the cable to detach from the transmission.

Consequence: If the shifter cable detaches from the transmission, the transmission may not shift into the gear selected by the driver. Additionally, despite selecting PARK with the shifter, the vehicle may roll away. These scenarios may increase the risk of a crash.

Remedy: Chrysler will notify owners, and dealers will replace the shifter cable adjuster, free of charge. The recall began January 9, 2020. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is VB4.

Power Train:automatic Transmission

Chrysler (FCA US LLC) is recalling certain 2012-2013 Fiat 500 vehicles equipped with 6-speed automatic transmissions. The shifter cable bushing may fail allowing the cable to detach from the transmission.

Consequence: If the shifter cable detaches from the transmission, the transmission may not shift into the gear selected by the driver. Additionally, despite selecting PARK with the shifter, the vehicle may roll away. These scenarios may increase the risk of a crash.

Remedy: Chrysler will notify owners, and dealers will replace the shifter cable adjuster, free of charge. The recall began January 9, 2020. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is VB4.

16V302000 · Power Train:manual Transmission

May 16, 2016

Chrysler (FCA US LLC) is recalling certain model year 2012-2016 Fiat 500 vehicles manufactured June 21, 2010, through January 12, 2016, equipped with a manual transmission. The clutch diaphragm spring may fracture and fail, causing an inability to switch gears.

Consequence & remedy

Consequence: If the clutch diaphragm spring fails, the driver may not be able to shift gears or the vehicle may lose motive power, increasing the risk of a crash.

Remedy: The remedy for this recall will include the installation of a clutch pedal limiter and a clutch pedal switch. The recall began on November 10, 2016. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is S34.

11V550000 · Service Brakes, Hydraulic:fluid

Nov 10, 2011

CHRYSLER IS RECALLING CERTAIN MODEL YEAR 2012 DODGE JOURNEY AND FIAT 500 VEHICLES MANUFACTURED FROM OCTOBER 24, 2011, THROUGH OCTOBER 26, 2011. SOME VEHICLES WERE ASSEMBLED WITH CONTAMINATED BRAKE FLUID AND MAY EXPERIENCE A DEGRADATION OF THE SEALING COMPONENTS WITHIN THE BRAKE SYSTEM.

Consequence & remedy

Consequence: THIS COULD LEAD TO LOSS OF BRAKING ABILITY INCREASING THE RISK OF A CRASH.

Remedy: CHRYSLER WILL NOTIFY OWNERS AND REPLACE ALL BRAKE COMPONENTS THAT COME IN CONTACT WITH HYDRAULIC BRAKE FLUID. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MARCH 1, 2012. OWNERS MAY CONTACT CHRYSLER AT 1-800-853-1403.

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

1

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.