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2015 Acura Tlx

Owner reports · Recalls · Investigations

More warning signs than most Tlx years

Owner complaints for the 2015 Acura Tlx are substantially higher than the model-year median of 65.

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When problems were reported

Mileage at the reported incident

231 reports with mileage · 110 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 160 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 82 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 64 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

12 crash reports0 fire reports5 injury reports

Service Brakes complaints

24 reports
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16,000 miles · Jul 28, 2017
Service BrakesCrashInjury

MY WIFE WAS INVOLVED IN A CAR ACCIDENT IN WHICH OUR CAR GOT T-BONED ON THE DRIVER SIDE. MY WIFE WAS COMPLETELY BLINDSIDED AND ALL THE AIRBAGS ON THE DRIVER SIDE DEPLOYED AND WHEN SHE SAW THE SMOKE SHE THOUGHT THERE WAS A FIRE SO SHE TOLD MY MOTHER IN LAW TO QUICKLY GET MY 2 YR. OLD CHILD OUT OF HER CAR SEAT. AS MY WIFE AND HER …

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MY WIFE WAS INVOLVED IN A CAR ACCIDENT IN WHICH OUR CAR GOT T-BONED ON THE DRIVER SIDE. MY WIFE WAS COMPLETELY BLINDSIDED AND ALL THE AIRBAGS ON THE DRIVER SIDE DEPLOYED AND WHEN SHE SAW THE SMOKE SHE THOUGHT THERE WAS A FIRE SO SHE TOLD MY MOTHER IN LAW TO QUICKLY GET MY 2 YR. OLD CHILD OUT OF HER CAR SEAT. AS MY WIFE AND HER SISTER WHO WAS ALSO SITTING IN THE FRONT STARTED WALKING TOWARDS THE BACK OF THE CAR TO GET ME DAUGHTER OUT OF THE CAR OUR CAR STARTED ROLLING BACK EVEN THOUGH IT WAS SMASHED TO THE RIGHT SIDE OF THE RODE AND WAS AT A COMPLETE STOP. MEANWHILE HER MOM WAS IN THE BACK TRYING TO GET OUT OF A MOVING CAR WHICH SHE THOUGHT WAS ON FIRE. SINCE THE CAR STARTED ROLLING BACK INTO ONCOMING TRAFFIC MY MOTHER IN LAW WHO WAS HOLDING MY DAUGHTER GOT DRAGGED ALONG THE PAVEMENT WITH MY DAUGHTER IN HER CHEST BECAUSE HER LEG GOT STUCK IN THE CAR. SHE FINALLY GOT OUT OF THE CAR AS IT WAS ROLLING PAST THE MIDDLE OF THIS BUSY STREET BUT THE CAR KEPT ROLLING BACK UNTIL EVENTUALLY THE BACK BUMPER ROLLED INTO ANOTHER CAR. MY WIFE SWEARS SHE PUT THE CAR IN PARK AND HAS NO IDEA WHY THE CAR STARTED ROLLING BACK AND OBVIOUSLY SHE WOULDN'T GET OUT OF A MOVING CAR SO YOU KNOW THE CAR HAD COME TO COMPLETE STOP. WHEN WE CALLED ACURA TO REPORT THIS ISSUE THEY CHALKED IT UP TO MY WIFE LEAVING THE CAR IN NEUTRAL BUT THE CAR WAS NOT SMASHED ONTO A HILL AND THE ROAD WAS FLAT. FURTHERMORE WE FOUND ONLINE THERE ARE PARKING BRAKE ISSUES WITH THE TLX BUT THE ACURA REP STATED THE RECALL WAS NOT FOR OUR VIN#. MY DAUGHTER AND MOTHER IN LAW COULD HAVE DIED FROM THIS ISSUE BUT ACURA REALLY DIDN'T SHOW ANY CONCERN.

NHTSA ODI #11011205

14,000 miles · Jul 20, 2017
Electrical SystemElectronic Stability Control (esc)Service Brakes

WHILE DRIVING AT 45MPH THE CAR LOST POWER I.E., STEERING, BRAKES, STABILITY CONTROL AND TRANSMISSION AND WAS UNABLE TO UNLOCK PARKING BRAKE

NHTSA ODI #11006549

61,185 miles · May 17, 2017
Power TrainService Brakes

TL* THE CONTACT OWNS A 2015 ACURA TLX. WHILE THE VEHICLE WAS STOPPED IN TRAFFIC, SEVERAL WARNING INDICATORS ILLUMINATED. IN ADDITION, THE EMERGENCY PARKING INDICATOR BEGAN TO FLASH AND THE BRAKE LIGHTS CONSTANTLY ILLUMINATED. THE CONTACT PULLED OVER, SHUT OFF THE VEHICLE, ACTIVATED THE EMERGENCY PARKING BRAKE, AND RESTARTED THE …

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TL* THE CONTACT OWNS A 2015 ACURA TLX. WHILE THE VEHICLE WAS STOPPED IN TRAFFIC, SEVERAL WARNING INDICATORS ILLUMINATED. IN ADDITION, THE EMERGENCY PARKING INDICATOR BEGAN TO FLASH AND THE BRAKE LIGHTS CONSTANTLY ILLUMINATED. THE CONTACT PULLED OVER, SHUT OFF THE VEHICLE, ACTIVATED THE EMERGENCY PARKING BRAKE, AND RESTARTED THE VEHICLE, BUT THE FAILURE RECURRED. THE CONTACT REPEATED THE PROCESS AND RECEIVED THE SAME RESULTS. THE CONTACT INFORMED THE DEALER WHO HAD THE CONTACT RESET THE VEHICLE, BUT THE FAILURE REMAINED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 14V779000 (POWER TRAIN). THE APPROXIMATE FAILURE MILEAGE WAS 61,185.

NHTSA ODI #10986127

20,000 miles · Dec 11, 2016
Service BrakesCrash

DRIVING AT APPROXIMATELY 15MPH WENT TO STOP FOR TRAFFIC AND BRAKES FAILED. REAR ENDED JEEP GRAND CHEROKEE. NO PEDAL PULSE FOR ABS ROADS WERE NOT SLIPPERY. *TR

NHTSA ODI #10934570

6,000 miles · Aug 22, 2016
Service BrakesCrash

TL* THE CONTACT OWNS A 2015 ACURA TLX. WHILE DRIVING VARIOUS SPEEDS, THE BRAKES FAILED WHEN THE BRAKE PEDAL WAS DEPRESSED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE CRASHED INTO A POLE. THE AIR BAGS DID NOT DEPLOY. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE FROM THE CRASH SITE. A POLICE REPORT WAS NOT FILED AND TH…

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TL* THE CONTACT OWNS A 2015 ACURA TLX. WHILE DRIVING VARIOUS SPEEDS, THE BRAKES FAILED WHEN THE BRAKE PEDAL WAS DEPRESSED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE CRASHED INTO A POLE. THE AIR BAGS DID NOT DEPLOY. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE FROM THE CRASH SITE. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE FAILURE RECURRED NUMEROUS TIMES. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 6,000. THE VIN WAS NOT AVAILABLE.

NHTSA ODI #10897587

23,031 miles · Jun 16, 2016
Electronic Stability Control (esc)EngineService Brakes

2 DIFFERENT TIMES WHILE DRIVING I75( 30-45MPH HEAVY TRAFFIC) AND THEN I16 (55 -60 MPH RUSH HOUR TRAFFIC) THE CAR STALLS ALL LIGHTS FLASH OFF THEN BACK ON AND DASHBOARD LIGHTS UP FIRST SAYING BREAKS THE TRANSMISSION, STABILITY CONTROL. FIRST TIME TECH SAID FLUKE LOW VOLTAGE, SECOND SAID CAR DOWN SHIFTS TO 4TH GEAR AND GETS STUCK.

NHTSA ODI #10874581

5,000 miles · May 17, 2016
Power TrainService Brakes

I HAVE A 2015 ACURA TLX 4CYL. IT IS A VERY NICE LOOKING CAR HOWEVER THERE IS SOMETHING WRONG WITH THE TRANSMISSION. I HAVE TAKEN IT INTO THE ACURA DEALERSHIP AND THEY HAVE CONFIRMED THAT THERE IS SOMETHING WRONG HOWEVER THEY ARE NOT SURE WHAT. ALL THEY TELL ME IS THAT THERE ARE NO CODES COMING UP TELLING THEM WHAT IT IS. THE…

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I HAVE A 2015 ACURA TLX 4CYL. IT IS A VERY NICE LOOKING CAR HOWEVER THERE IS SOMETHING WRONG WITH THE TRANSMISSION. I HAVE TAKEN IT INTO THE ACURA DEALERSHIP AND THEY HAVE CONFIRMED THAT THERE IS SOMETHING WRONG HOWEVER THEY ARE NOT SURE WHAT. ALL THEY TELL ME IS THAT THERE ARE NO CODES COMING UP TELLING THEM WHAT IT IS. THEY JUST TELL ME THAT EVERYTHING IS DOCUMENTED SO IF AND WHEN THERE IS A RECALL I HAVE PROOF THAT IT HAS BEEN ONGOING. WHEN YOU ARE STOPPED AND THEN PROCEED TO GO THE CAR WILL JERK AND HESITATE TO SHIFT TO NEXT GEAR. THIS CAN HAPPEN WHILE YOU ARE DRIVING ALSO, IF YOU HAVE TO BRAKE AND THEN START AGAIN. ITS VERY UPSETTING I HAVE OWNED ACURAS BEFORE, THE ACURA TL AND THE ACURA INTEGRA, BOTH CARS HAD A HIGH PERFORMANCE. THIS CAR NOT SO MUCH. WHEN IS ACURA GOING TO DO SOMETHING ABOUT THIS?? THERE HASN'T BEEN JUST ONE EPISODE THIS IS AN EVERYDAY OCCURRENCE.

NHTSA ODI #10865435

1,625 miles · Mar 30, 2016
Service BrakesCrashInjury

TL* THE CONTACT OWNED A 2015 ACURA TLX. WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS DEPRESSED AND THE VEHICLE BECAME DIFFICULT TO STOP. THE CONTACT'S VEHICLE CRASHED INTO THE REAR OF ANOTHER VEHICLE, FLIPPED OVER, AND ROLLED UNTIL IT STOPPED. THE AIR BAGS DEPLOYED. A POLICE REPORT WAS FILED. THE DRIVER SUSTAINED INJURIES AND WAS T…

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TL* THE CONTACT OWNED A 2015 ACURA TLX. WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS DEPRESSED AND THE VEHICLE BECAME DIFFICULT TO STOP. THE CONTACT'S VEHICLE CRASHED INTO THE REAR OF ANOTHER VEHICLE, FLIPPED OVER, AND ROLLED UNTIL IT STOPPED. THE AIR BAGS DEPLOYED. A POLICE REPORT WAS FILED. THE DRIVER SUSTAINED INJURIES AND WAS TRANSPORTED TO THE EMERGENCY ROOM. THE CONTACT SUSTAINED INJURIES TO THE BACK, FACE, AND BOTH KNEES. THE VEHICLE WAS TOWED AND DESTROYED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 1,625. UPDATED 05/17/16*LJ UPDATED 12/13/2017*JS

NHTSA ODI #10852551

12,707 miles · Mar 17, 2016
Electrical SystemElectronic Stability Control (esc)Service Brakes

THE ORIGINAL FAILURE WAS SCARY. WE HAD JUST LEFT TEXAS HWY 130 (80 MPH TOLL WAY), WHEN WE SUSTAINED THE ORIGINAL FAILURE. AS IT FAILED, EVERYBODY IN THE CAR THOUGHT I HAD SLAMMED ON THE BRAKES BY THE WAY THE CAR BUCKLED (LIKE A BUCKING HORSE), IT HAD DONE A VIOLENT SUDDEN STOP AND RELEASE; THE CAR WENT TO IDLE AND COASTED FOR A …

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THE ORIGINAL FAILURE WAS SCARY. WE HAD JUST LEFT TEXAS HWY 130 (80 MPH TOLL WAY), WHEN WE SUSTAINED THE ORIGINAL FAILURE. AS IT FAILED, EVERYBODY IN THE CAR THOUGHT I HAD SLAMMED ON THE BRAKES BY THE WAY THE CAR BUCKLED (LIKE A BUCKING HORSE), IT HAD DONE A VIOLENT SUDDEN STOP AND RELEASE; THE CAR WENT TO IDLE AND COASTED FOR A BIT WITHOUT RESPONSE FROM THE ENGINE; I STUDIED THE PANEL BECAUSE EVERYTHING WAS LIT UP; ONCE I DECIDED THE ENGINE WAS STILL IDLING, I PRESSED THE ACCELERATOR SLOWLY UNTIL I DECIDED I HAD SOME CONTROL; CHECKED THE FAILURE MESSAGES; THEN TRIED TO DRIVE THE CAR. THE CAR COULD BE DRIVEN, I DROVE IT SLOWLY WITH THE HAZARD LIGHTS ON, THE CAR BUCKLED EVERY SO OFTEN. SINCE WE WERE CLOSE TO HOME WE WENT THERE. HAD THIS HAPPENED AT 80 MPH, I DON'T KNOW WHAT WOULD HAVE HAPPENED.

NHTSA ODI #10850220

3,000 miles · Nov 9, 2015
Air BagsElectronic Stability Control (esc)Service BrakesCrash

AFTER A MINOR FENDER BENDER, THE VEHICLE BECAME COMPLETELY DISABLED AND BLOCKED FOUR (4) LANES OF TRAFFIC FOR ALMOST FOUR (4) HOURS. THE DRIVER-SIDE KNEE AIRBAG DEPLOYED AND SEVERAL SENSORS/RELAYS BECAME INOPERABLE AND THE CAR REPORTED A BRAKING SYSTEM FAILURE THAT RENDERED THE CAR IMMOBILE. THE TIRES LOCKED UP AND THE VEHICLE S…

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AFTER A MINOR FENDER BENDER, THE VEHICLE BECAME COMPLETELY DISABLED AND BLOCKED FOUR (4) LANES OF TRAFFIC FOR ALMOST FOUR (4) HOURS. THE DRIVER-SIDE KNEE AIRBAG DEPLOYED AND SEVERAL SENSORS/RELAYS BECAME INOPERABLE AND THE CAR REPORTED A BRAKING SYSTEM FAILURE THAT RENDERED THE CAR IMMOBILE. THE TIRES LOCKED UP AND THE VEHICLE SUBSEQUENTLY HAD TO BE DRAGGED ONTO A FLATBED TOW TRUCK. ADDITIONALLY, THE ACURALINK SERVICE DID NOT CONTACT ME UNTIL 90+ MINUTES LATER AND THE ASSIST/SOS BUTTON FELL OFF OF THE CAR BEFORE I COULD ENGAGE IT. WHILE MAKING A LEFT TURN, THE FRONT END OF MY CAR WAS SIDESWIPED. MY VEHICLE IMMEDIATELY BECAME IMMOBILIZED WITH THE BRAKES FULLY ENGAGED ON ALL FOUR (4) TIRES. THE ACCIDENT HAPPENED ON A FOUR (4) LANE CITY STREET. MY CAR CAME TO REST IN A PARALLEL POSITION BLOCKING ALL FOUR (4) LANES.

NHTSA ODI #10789314

Official recalls

6

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.

23V751000 · Engine And Engine Cooling:engine:hard Parts Internal/mechanical

Nov 13, 2023

Honda (American Honda Motor Co.) is recalling certain 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2016 and 2018-2019 Pilot, 2017 and 2019 Ridgeline, and 2018-2019 Odyssey vehicles. Due to a manufacturing error, the connecting rod bearing in the engine may wear and seize, damaging the engine.

Consequence & remedy

Consequence: A damaged engine may run improperly or stall while driving, increasing the risk of a fire, crash, or injury.

Remedy: Dealers will inspect and repair, or replace the engine as necessary, free of charge. Owner letters were mailed March 28, 2024. 2016-2017 Acura MDX owner letters were mailed November 1, 2024. 2016-2020 Acura MDX owner letters are expected to be mailed in mid-December 2024. Honda began mailing owner notification letters as of March 18, 2024. 2015-2016 Acura owner letters are expected to be mailed mid-December 2024, 2018 Acura TLX owner letters are expected to be mailed the end of March/early April 2024, 2019 Acura TLX owner letters are expected to be mailed mid-May 2024, 2020 Acura TLX owner letters are expected to be mailed mid-June 2024, and 2016-2020 Acura MDX owner letters are expected to be mailed January 27, 2025. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls are XG1 and GG0.

19V060000 · Fuel System, Other:delivery:fuel Pump

Jan 29, 2019

Honda (American Honda Motor Co.) is recalling certain 2016-2018 Acura MDX, 2015-2019 Acura TLX and 2015-2017 Honda Accord vehicles, equipped with a 3.5L V6 engine. Particulates in fuel may adhere to the internal components of the fuel pump, reducing its performance.

Consequence & remedy

Consequence: Reduced fuel pump performance can result in an engine stall, increasing the risk of crash.

Remedy: Honda will notify owners, and dealers will update the fuel injection engine control unit (FI-ECU) software and, if necessary, replace the fuel pump, free of charge. The recall began March 25, 2019. Owners may contact customer service at 1-888-234-2138. Acura's recall number for this recall is P3W. Honda's recall number for this recall is N3X.

16V640000 · Power Train:automatic Transmission:control Module (tcm/pcm/tecm)

Sep 6, 2016

Honda (American Honda Motor Co.) is recalling certain model year 2015 Acura TLX 2WD and 4WD vehicles. In the affected vehicles, the transmission wire harness connections may have insufficient crimps, and, as a result, the transmission may unexpectedly shift to neutral.

Consequence & remedy

Consequence: If the vehicle unexpectedly shifts to neutral, there is an increased risk of a crash.

Remedy: Acura has notified owners, and dealers will, based on the automatic transmission serial number, update the transmission software to prevent the transmission from shifting into neutral due to a faulty crimp, free of charge. The recall began January 13, 2017. Owners may contact Acura Client Relations at 1-888-234-2138. Honda's number for this recall is KC2.

14V779000 · Power Train:automatic Transmission

Dec 8, 2014

American Honda Motor Co. (Honda) is recalling certain model year 2015 Acura TLX V6 2WD vehicles manufactured July 14, 2014, to November 12, 2014, and certain 2015 TLX V6 SH-AWD vehicles manufactured August 26, 2014, to November 10, 2014. The automatic transmission parking pawl may become contaminated or the park rod may become dislodged or broken. This may prevent the transmission from shifting into the Park position.

Consequence & remedy

Consequence: If the shift indicator displays "Park" but the park lock does not engage, the vehicle may roll away increasing the risk of a crash.

Remedy: Honda will notify owners, and dealers will inspect and replace the transmission if necessary, free of charge. The recall began January 30, 2015. Owners may contact Honda customer service at 1-310-783-2000. Honda's number for this recall is JM8.

14V613000 · Equipment:other:labels

Oct 1, 2014

American Honda Motor Co. (Honda) is recalling certain model year 2015 Acura TLX AWD vehicles manufactured August 26, 2014, to September 20, 2014. The affected vehicles may have incorrect values for the Gross Vehicle Weight Rating (GVWR) and Gross Axle Weight Rating (GAWR) front and rear printed on the safety certification label. As such, the vehicles do not conform to Part 567, "Certification."

Consequence & remedy

Consequence: If the vehicle is loaded to the specifications listed on the label, tire failure may result, increasing the risk of a crash.

Remedy: Honda will notify owners, and dealers will install a corrected certification label, free of charge. The recall is expected to begin on October 21, 2014. Owners may contact Honda customer service at 1-800-382-2238. Honda's number for this recall is JK6.

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

EA25004 · No Restart After Auto Start/stop Engages

Opened Mar 26, 2025 · No close date supplied

Status: open (inferred from source dates) · Engine And Engine Cooling:engine; Engine And Engine Cooling:engine:crank/camshaft Position Sensor; Engine And Engine Cooling:engine:engine Control Module (ecu/ecm):software; Engine And Engine Cooling:engine:hard Parts Internal/mechanical

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Additional source detail variants (4)

Engine And Engine Cooling:engine:crank/camshaft Position Sensor

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine:engine Control Module (ecu/ecm):software

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine:hard Parts Internal/mechanical

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

Engine And Engine Cooling:engine

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

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.