My rear calipers are frozen. My car has 41,000 miles on it now and at 21,427 miles my rear calipers were frozen I paid and got them replaced and now again there frozen something doesn’t make sense
2017 Jeep Wrangler
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2017 Jeep Wrangler do not stand out strongly from the model-year median of 265.
About this comparison →How this year compares
Owner complaints by model year
Compare all Wrangler years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
159 reports with mileage · 150 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.
- Service Brakes. Review the 75 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine. Review the 62 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 50 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
75 reportsAfter driving vehicle, strong burning smell Took to dealership - diagnose is new calipers - 5 year old vehicle with 52,000 plus miles. Asked Chrysler to recognize through phone call to customer service??? Inquiring about warranty first then asking for them to recognize defect in same phone call - third party warranty is help…
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After driving vehicle, strong burning smell Took to dealership - diagnose is new calipers - 5 year old vehicle with 52,000 plus miles. Asked Chrysler to recognize through phone call to customer service??? Inquiring about warranty first then asking for them to recognize defect in same phone call - third party warranty is helping with costs - brake calipers and lines should not be failing on this vehicle at 5 years old 52,000 plus miles and unmodified
This jeep has 60,000 miles and is 5 years old and has had all 4 calipers seized and rotators brakes replaced and cylinders misfired in the engine that has been replaced. All this on a new vehicle is insane and a safety hazard for a vehicle this young AND with this low of mileage. I took ownership of this jeep in March of 2020 w…
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This jeep has 60,000 miles and is 5 years old and has had all 4 calipers seized and rotators brakes replaced and cylinders misfired in the engine that has been replaced. All this on a new vehicle is insane and a safety hazard for a vehicle this young AND with this low of mileage. I took ownership of this jeep in March of 2020 with 33k miles. Then in January 2021 with about 40k miles on the car being 3 1/2 years old the back calipers seized causing smoke and burning smell and was a fire hazard and unsafe to drive. Fast forward another year and a few months later on May 13th I was driving the vehicle and the BACK calipers siezed while in operation and now both rear sides had to be replaced, rotators, calipers, brakes and hoses. A year and 1/2 later only 15,000 more miles. So now all 4 calipers siezed and were replaced, motors, brakes, hoses. This most recent time it was to the cost of $1427.15. I googled this issue and it is a common issue and a known issue in jeeps especially in 2017s. A complaint from 2017 shows a gentleman was reimbursed for this exact issue by FCA after his complaint and I am looking for the same. I have also had the engine cylinders misfire and go up in this jeep as well that occurred 2 months ago!
The car brakes failed Thursday May 5, 2021 while I was in the open road. The car did not have any prior warning sign indicating there was an issue with the brakes until after the fact, which with the help of the emergency brake I was able to park on the side of the road and have a towing company pick it up. My car has been at th…
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The car brakes failed Thursday May 5, 2021 while I was in the open road. The car did not have any prior warning sign indicating there was an issue with the brakes until after the fact, which with the help of the emergency brake I was able to park on the side of the road and have a towing company pick it up. My car has been at the dodge, Jeep Wrangler dealership since. I contacted the dealer that sold me the car “EchoPark at Grand Prairie” in Texas, the dealer was aware that the brake pads were well below 50% of useful life when they sold me that car that was ultimately the thing that caused my brakes to fail and they’ve refused to pay for the damages occurred, or compensate me in any sort of way. I believe my life and my friends life(a pregnant woman) who was my passenger was put at risk because the dealership failed to check on an item that needed to be check before the car was sold to me. I’ve keep calling the dealership where the car was purchased and they only paying for the broken Caliper through a extended warranty and refused to pay for the additional damaged Ive incurred due to their negligence.
The contact stated the vehicle was exhibiting a pulling sensation and jerking. The vehicle did not display any warning lights. The contact took the vehicle to the dealership who diagnosed that the calibers failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware and confirmed the repai…
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The contact stated the vehicle was exhibiting a pulling sensation and jerking. The vehicle did not display any warning lights. The contact took the vehicle to the dealership who diagnosed that the calibers failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware and confirmed the repair was not covered under warranty. The approximate failure mileage was 31,069.
DTCs for left AND right rear wheel sensors. wiring was open on sensors and caused the speed sensors to not read properly at times 3.00. the sensors were replaced at Mac Haik. 3 other jeeps had the same issue the same day. ABS and traction control lights on dash came on before the sensors were replaced and applying gas did nothin…
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DTCs for left AND right rear wheel sensors. wiring was open on sensors and caused the speed sensors to not read properly at times 3.00. the sensors were replaced at Mac Haik. 3 other jeeps had the same issue the same day. ABS and traction control lights on dash came on before the sensors were replaced and applying gas did nothing. my jeep was automatically applying my breaks even when I went 5 mph.
We took our car to Rairdon's Dodge Chrysler Jeep of Kirkland for oil change and checking the brake on February 12th because the rare brake had been making some noises and might need a replacement soon. The estimate for the services that we requested plus the additional services that they claimed to be critical was over $2,000. W…
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We took our car to Rairdon's Dodge Chrysler Jeep of Kirkland for oil change and checking the brake on February 12th because the rare brake had been making some noises and might need a replacement soon. The estimate for the services that we requested plus the additional services that they claimed to be critical was over $2,000. We did not question the amount because safety first and we trusted them to do a good job. We picked up the car on February 15th and paid $2,863.68. We drove home and did not use it until a week later. While driving on a highway, the brake was very loose and there was a huge sound when driving over a speed bump. We checked the car and noticed that a part came off and hanging from the base of the car. We had our car towed back to the shop on March 7th and the staffed confirmed that the caliper had fell off. The service director said they did not touch the caliper when they performed the initial service. Therefore, she was not sure what happened to the car. This is a serious safety issue because we could have get into a car accident or hit other people in the street.
Both front calipers froze at 48,663 miles causing excessive smoke and brake damage. Only symptom was shaking of steering wheel during normal use. Stopped immediately. Vehicle towed, cost to repair $1200.00
ANTI LOCK BRAKING SYSTEM AND TRACTION CONTROL ACTIVATE AT LOW SPEEDS - AT 5-10 MPH. IT APPLIES THE BRAKES WITHOUT WARNING AND CUTS POWER TO THE ENGINE.
2017 jeep Wrangler sport JKU all stock, normal road tires from the dealership, rear and front driver side break caliper is sticking and causing break drag at 32,000. due to this causing the rear break pads to prematurely wear bi-lateral and damaging the rotor on the affected side, causing the vehicle to operate at higher RPMS as…
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2017 jeep Wrangler sport JKU all stock, normal road tires from the dealership, rear and front driver side break caliper is sticking and causing break drag at 32,000. due to this causing the rear break pads to prematurely wear bi-lateral and damaging the rotor on the affected side, causing the vehicle to operate at higher RPMS as the breaks are dragging. due to the heat the caliper boot was damaged as well. Excessive dust on rim and burning break smell with excessive friction heat along with the vehicle pulls to affected side when you let go of the wheel at residential speeds. the heat causes a dangerous break lag and the break pedal is harder to depress as what i believe is fluid not making it back to the master cylinder. when the vehicle is in drive you let your foot off the break on level ground the vehicle dose not move as it should when the transmission is in drive at idle, no gas given, the breaks squeak and jump grip as the jeep tries to move when gas is given, the break is stuck on the rotor. rear breaks where replaced bilaterally cleaned with new calipers, high temp silicone grease , rotors and ceramic pads is hopes to fix the problem. after that is when the front driver caliper was noticeably showing the same signs as the rear did. to have a non dealership mechanic do the job is 970.00.vehicle drives as if the emergency break is on but was inspected and is not touching the inner drum. vehicle is not heavily uses ether 1.)no lights or check break lights luminated its all feel. no accidents due to the break lag but is very dangerous if you need to stop suddenly. 2.)issue confirmed by a independent service center mechanic 3.) at 15,000 miles vehicle was taken back to the dealership for a break groaning sound and squeak when backing up or when driving, dealer stated it was just dust on the pads, inspection found no issues. after the visit the sound would still periodically kept reoccurring but was kept being told "dust" not sure if that was a early sign
Official recalls
519V680000 · Seat Belts:front:anchorage
Sep 26, 2019
Chrysler (FCA US LLC) is recalling certain 2011-2018 Jeep Wrangler right hand drive vehicles. The driver's seat belt buckle mounting strap may fracture and separate from the seat frame.
Consequence & remedy
Consequence: A separated or severed seat belt buckle strap will result in an inoperable seat belt, increasing the risk of injury in the event of a crash.
Remedy: FCA US will notify owners, and dealers will replace the driver's seat belt buckle, free of charge. Interim notices informing owners of the safety risk were mailed November 19, 2019. Owners will received a second letter and the recall began March 26, 2020. Owners may contact FCA customer service at 1-800-853-1403. FCA's number for this recall is VA6.
18V524000 · Electrical System:wiring:front Underhood
Aug 9, 2018
Chrysler (FCA US LLC) is recalling certain 2018 Jeep Renegade, Compass and Grand Cherokee, RAM 1500 and Promaster, Fiat 500x, Dodge Journey, Challenger, Charger and Durango and Chrysler 300x vehicles, 2017-2018 Jeep Wrangler, Dodge Grand Caravan and Chrysler Town and Country vehicles and 2018-2019 Jeep Cherokee and 2018 Chrysler Pacifica and Pacifica Hybrid vehicles. The powertrain control module may be equipped with a voltage regulator chip in the circuit board that may fail, causing a stall or a no start condition.
Consequence & remedy
Consequence: A vehicle stall can increase the risk of a crash.
Remedy: Chrysler will notify owners, and dealers will replace the powertrain control module, free of charge. The recall began October 2, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is U87.
18V098000 · Exterior Lighting:brake Lights:switch
Feb 8, 2018
Chrysler (FCA US LLC) is recalling certain 2017 Dodge Caravan and Jeep Wrangler vehicles. The brake switches on these vehicles may malfunction, keeping the brake lights illuminated and/or allowing the vehicle to be shifted out of the PARK position without the brake pedal being pushed.
Consequence & remedy
Consequence: Having the brake lamps continuously illuminated or being able to shift the vehicle out of PARK when the brake pedal is not pressed (and the ignition is in the RUN mode) can increase the risk of a crash.
Remedy: Chrysler will notify owners, and dealers will replace the brake switches, free of charge. The recall began March 22, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is U09.
16V849000 · Fuel System, Gasoline:storage:tank Assembly
Nov 23, 2016
Chrysler (FCA US LLC) is recalling certain model year 2017 Jeep Wrangler vehicles manufactured November 1, 2016, to November 3, 2016. The affected vehicles may have a fuel tank that has a cracked or broken control valve, possibly resulting in a fuel leak in a rollover event, debris in the fuel tank and/or the potential of over fueling the vehicle.
Consequence & remedy
Consequence: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: Chrysler will notify owners, and Jeep dealers will inspect the fuel tank and replace fuel tank and sending unit, as necessary, free of charge. The recall began January 12, 2017. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is S90.
16V734000 · Air Bags:frontal:sensor/control MODULE-INACTIVE
Oct 13, 2016
Chrysler (FCA US LLC) is recalling certain model year 2016-2017 Jeep Wrangler vehicles manufactured June 16, 2015, to August 14, 2016. In certain crash conditions, the front impact sensor wiring may be pulled until it detaches before a signal can be received by the Occupant Restraint Controller (ORC).
Consequence & remedy
Consequence: If the ORC module does not receive a signal from the front impact sensor, both frontal air bags and the seat belt pretensioners will not deploy in the event of a crash, increasing the risk of injury.
Remedy: Chrysler will notify owners, and dealers will reroute the front impact sensor wiring and relocate the impact sensor branch, free of charge. 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 S76.
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
3EA21002 · 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.
PE19008 · Seat Belt Buckle Bracket Failure
Opened Jul 29, 2019 · Closed Dec 12, 2019
Status: closed (inferred from source dates) · Seat Belts:front:buckle Assembly
On July 17, 2019, NHTSA's Office of Defects Investigation (ODI) opened Preliminary Evaluation (PE) 19-008 after receiving three Vehicle Owner Questionnaire (VOQ) reports alleging the driver's side seat belt buckle separated from the seat frame, rendering the seat belt non-functional. The VOQs involved model year (MY) 2015 and 2016 Jeep Wrangler (JK platform) that were configured for right-hand drive (RHD) use. On August 8, 2019, ODI issued an information request (IR) letter to FCA.The scope of the IR included all JK Wrangler produced for sale in the U.S. (both left- and right-hand drive), and amongst other things, requested any reports or allegations of driver's seat belt bracket failures on these vehicles. In its review of FCA's response, ODI determined that approximately 1.7 million JK Wrangler were produced from MY 2007 to 2018, about 16,000 of which were configured for RHD. ODI notes that the RHD Wrangler are typically used for rural postal delivery which often experience a more severe duty cycle. Also RHD JK was was not produced in MY 2007.As explained in the IR response, FCA identified three distinct populations of JK Wrangler concerning the driver's seat belt bucket bracket; specifically the MY 2007-2018 LHD (~1.7M units), the MY 2008-2010 RHD (4,563 units), and the MY 2011-2018 RHD (11,463 units) populations.FCA provided details on the designs used in each of these populations, identifying specific differences deemed pertinent to the strength and durability of each unique bracket design. FCA further reviewed its analysis of the complaint and warranty data identified under the IR, and noting that it had not identified any allegations of bracket failures on the LHD population, and only one allegation on the MY 2008-2010 RHD vehicles. By comparison, FCA identified 24 allegations of bracket failure for the MY 2011-2018 RHD JK, including two reports duplicative of the VOQs. Neither the FCA nor the VOQ reports allege an injury or fatality due to bracket failure. Based on this analysis, FCA decided to conduct a safety recall for the MY 2011-2018 RHD JK population. On September 30, 2019, FCA submitted a Defect Information Report initiating NHTSA Safety Recall 19V-680 (FCA No. VA6). Under the recall action, FCA will replace the driver's seat belt bracket on MY 2011-2018 RHD Jeep JK Wrangler. The repair will be conducted free of charge.In view of FCA's recall action, and its explanations of the scope of that action, ODI is closing PE19-008. ODI will continue to monitor the non-recalled RHD, and the LHD JK Wrangler for evidence of seat belt bracket failure and will take further action if warranted.The three VOQ reports cited above can be reviewed at NHTSA.gov under the following reference numbers:11190251, 11218472, 11231639.
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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