Engine. Review the 161 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Power Train. Review the 111 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Electrical System. Review the 37 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

10 crash reports5 fire reports5 injury reports

What owners actually said

373 reports

36,000 miles · Dec 14, 2018

EnginePower TrainService Brakes

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ACURA IS REFUSING TO ADDRESS A SERIOUS PROBLEM WITH THE ENGINE AND POWER TRAIN WITH THE VEHICLE, THIS MAY HAVE ALREADY CAUSED ACCIDENTS ON OTHER CARS IN OTHER STATES. PLEASE SEE THE HISTORICAL DATA WHICH GIVES A COMPLETE AUDIT OF THE ISSUES I HAVE HAD. 9/22/18 11 DAYS- VEHICLE TAKEN TO THE DEALER AND DROPPED FOR SERVICE, PUNCH LIST OF ISSUES SINCE PURCHASE THAT NEEDED ADDRESSED. ALIGNMENT REPORT IS SIGNED OFF ON 9/24/18, BATTERY CHECK 10/1/18, SERVICE WAS STARTED ON 9/29/18, CAR SAT FOR A WEEK WITH NO SERVICE ATTEMPT MADE. OIL STAINS ON ROOF LINER WERE LEFT THERE AND WAS TOLD THEY WOULD NOT CLEAN THEM OFF (LATER PROVEN TO BE MECHANICS GREASE BY MERRILLVILLE) AND SPIDER WAS MY PROBLEM NOT THERES PER 'ROB' IN SERVICE. ISSUES THE CAR WAS TAKEN IN FOR. ALL OF THE BELOW SERVICE WAS COMLETED IN 5 MILES ACCORDING TO ODOMETER READINGS. ON 10/12/18 I TOOK THE VEHICLE TO ACURA OF MERRILLVILLE PER 'ANTHONY' FROM ACURA CLIENT CARE TO HAVE IT CHECKED. I DROVE IT WITH THE TECH AND THE TECH WAS ABLE TO VALIDATE A LOT OF THE ISSUES RIGHT AWAY. IT WAS RETURNED TO ME ON 11/2/18 22 DAYS ON 11/24/18 I RETURNED THE VEHICLE TO ACURA OF MERRILLVILLE DUE TO THE TRANSMISSION ISSUE RETURNING, ALSO ADDRESSED A COUPLE OF ISSUES. CAR RETURNED ON 11/28/18 4 DAYS VEHICLE LOSES POWER WHEN SHIFTING TO ACCELERATE, OFTEN HAVE TO DOWNSHIFT USING PADDLE SHIFTERS TO MAKE POWER OR CAR ACTS LIKE ITS GOING TO STALL. BRAKES DO NOT FUNCTION UNILATERALLY, HIT THE BRAKES HEAVY WHILE IN TRAFFIC AND THE BACK WILL BEGIN TO COME AROUND AS THOUGH ONE OF THEM DOES NOT GRAB. ENGINE LOSES POWER WHEN IN TRAFFIC IT STRUGGLES TO ACCELERATE WHICH COULD CAUSE A CRASH IF NEEDING POWER TO ACCELERATE ONTO A EXPRESSWAY FROM AN ENTRANCE RAMP, OR ANYWHERE THAT REQUIRES POWER TO MOVE THE CAR.

NHTSA ODI #11161322

Mileage unknown · Dec 5, 2018

Power Train

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THE 9 SPEED TRANSMISSION ON THIS CAR IS TERRIBLE. HARD SHIFTING, LUNGING FORWARD, THE CAR ACCELERATES ON IT'S OWN LIKE IT DOESN'T KNOW WHICH GEAR IT SHOULD BE IN. WHEN ACCELERATING, THE CAR HESITATES AND FEELS LIKE IT LOSES POWER. THIS IS A VERY DANGEROUS VEHICLE. TOOK IT TO THE DEALER SEVERAL TIMES AND THEY SAY THIS IS THE WAY THE CAR WAS DESIGNED. IT WAS DONE TO MEET FUEL EFFICIENCY STANDARDS. ACURA IS SACRIFICING SAFETY AND COMFORT IN ORDER TO MEET THE FUEL STANDARDS.

NHTSA ODI #11156088

32,900 miles · Oct 18, 2018

Power Train

THE TRANSMISSION SHIFT VERY HARD AND WHEN I RELEASE THE GAS PEDAL THE CAR STAR TO BRAKE AND ACCELERATE BY HIM SELF AND IT'S DANGER AND ANNOYING

NHTSA ODI #11141237

35,000 miles · Aug 12, 2018

Unknown Or OtherVehicle Speed Control

THE LETTERS ON THE SHIFTING CONTROLS ARE WEARING OFF WITH NORMAL USE CREATING AN UNSAFE CONDITION AS IT IS BECOMING UNCLEAR WHICH SHIFT BUTTONS PUT THE VEHICLE IN PARK. THIS HAS OCCURRED ON BOTH MY 2016 HONDA VEHICLES. HONDA HAS ACKNOWLEDGED THIS ISSUE BUT ONLY OFFERS TO PAY ONE HALF OF THE COST OF CORRECTING THIS DANGEROUS IS…

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NHTSA ODI #11119430

44,108 miles · Jul 26, 2018

Electrical SystemEnginePower Train

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WHEN DRIVING AROUND 75 MPH ON THE INTERSTATE I WENT TO SWITCH LANES AND WHEN PRESSING THE ACCELERATOR NOTHING HAPPENED AND ACCELERATION WAS NOT POSSIBLE. ALL WARNING LIGHTS CAME ON, INCLUDING ALL WHEEL DRIVE SYSTEM PROBLEM, EMISSION SYSTEM PROBLEM, ALL WHEEL DRIVE SYSTEM PROBLEM, TRANSMISSION SYSTEM PROBLEM. CHECK ENGINE AND SH-AWD. THE POWER STEERING AND BRAKES STILL WORKED AND WAS EXTREMELY LUCKY TO GET THE CAR TO THE SHOULDER WITHOUT GETTING INJURED OR KILLED. HAD CAR TOWED TO CHATTANOOGA ACURA DEALER. CAR WAS OPERATING NORMALLY WHEN THEY RECEIVED IT. ACURA TECH SUPPORT ADVISED DEALER TO REPLACE TRANSMISSION AND TRANSMISSION CONTROL MODULE (TCM). ALSO WAS TOLD ACURA IS WORKING ON A SOFTWARE UPDATE FOR THE TCM BUT IT IS NOT AVAILABLE YET BUT I HAVE LITTLE CONFIDENCE IN THE FIX AND LITTLE CONFIDENCE THAT THIS WON'T REOCCUR. STRONGLY CONSIDERING REPLACING THE CAR

NHTSA ODI #11113899

14,000 miles · Jul 19, 2018

Power TrainVehicle Speed Control

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9 SPEED TRANSMISSION LURCHES FORWARD WHEN TRYING TO STOP - SENDING THE CAR FORWARD WHILE TRYING TO BRAKE. HAPPENS WHEN THE CAR SHOULD SHIFT BETWEEN GEARS 3-2 AND 1-2/2-1. ACURA DEALERSHIP SAID IT'S THE FUEL SAVER ONCE, NORMAL THE SECOND TIME, AND UPDATED THE TCM/PCM ANOTHER. THERE IS NO ONE ADDRESSING THIS WHEN IT COULD SEND MY CAR INTO ANOTHER CAR WHEN TRYING TO STOP. THE LAST TIME I DROVE IT ON SUNDAY 7/15 I WAS SLOWING DOWN TO TURN INTO A SHOPPING CENTER, GOING AROUND 20MPH WHEN THE CAR JERKED FORWARD, SNAPPING MY NECK FORWARD 12"-14" THEN BACK AGAIN. THE CAR IS AT THE DEALERSHIP NOW WITH THE SERVICE ADVISER SAYING THE LURCHING IS THE FUEL SAVER AND THAT ACURA WON'T PAY FOR A WARRANTIED ITEM UNLESS THE SERVICE LIGHT/CODES ARE THERE.

NHTSA ODI #11112342

900 miles · Jun 15, 2018

Unknown Or Other

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VEHICLE HESITATES FROM A STOP. USUALLY FIRST DRIVE OF THE DAY. INTERMITTENT BUT BECOMING MORE FREQUENT AND AT RANDOM TIMES. SOMETIMES, AFTER DRIVEN AND LEAVING A STOP SIGN/LIGHT OR ENTERING TRAFFIC. ACURA CLAIMS THEY HAVE NEVER DUPLICATED PROBLEM IN MY VEHICLE AND NO DTCS SET. OPERATES NORMAL. RECENTLY RETIRED DEALER SERVICE MANAGER TOLD ME IT HESITATED TWICE FOR HIM (NEVER PUT IT IN WRITING), ONCE WITH COMPUTER ATTACHED. ACURA TECH LINE WAS SENT DATA AND RESPONDS OPERATION NORMAL. ACURA DISTRICT PARTS AND SERVICE MANAGER STATES ORDINARY OPERATIONS OF ALL SYSTEMS INCLUDING TRANSMISSION. HE STATES TIME LAG BETWEEN THE TIME STARTED, SHIFTING TRANSMISSION INTO GEAR, SENSORS SENDING AND RECEIVING DATA AND VEHICLE RESPONDING. THIS IS A DRIVE BY WIRE SYSTEM THAT INVOLVES A COMPUTER AND SENSORS AND SOMETIMES THEY COMMUNICATE SLOWER IT APPEARS THERE IS A HESITATION. THIS IS A NORMAL PROCESS OF THE VEHICLE. WHEN I PRESS ACCELERATOR PEDAL, AFTER SHIFTING INTO DRIVE, VEHICLE DOES NOT MOVE, RPM DOES NOT CHANGE. SUDDENLY AND AGGRESSIVELY, THE VEHICLE LURCHES FORWARD, I THINK CORRESPONDING TO THE ACCELERATOR POSITION AT THE TIME, AND THE RPM SURGES. I THINK THE VEHICLE DRIVES AND OPERATES FINE AFTER IT IS MOVING. IT IS A SERIOUS SAFETY HAZARD THAT COULD CAUSE ME TO RUN INTO SOMEONE OR BE HIT BY SOMEONE. ACURA'S DENIAL OF THE PROBLEM DOES NOT MAKE IT GO AWAY. IF THE HESITATION WAS NORMAL, EVERY VEHICLE LIKE MINE WOULD HESITATE. IF IT WERE NORMAL, THEY WOULD BE ABLE TO DUPLICATE IT. IT IT WERE NORMAL, IT WOULD HESITATE EVERY TIME I DRIVE IT. IF THE HESITATION WAS NORMAL, IS IT NOT NORMAL WHEN IT DOESN'T HESITATE? HESITATION BEGAN WITHIN WEES OF PURCHASING FROM THE DEALER. CURRENTLY HAVE 38000+ MILES. HAVE LITERALLY CHANGED THE WAY WE OPERATE THE VEHICLE ANTICIPATION IT WILL HESITATE. SEVERAL VIDEOS SHOWING RPM SURGE WITH ACCELERATOR FULLY DEPRESSED THAT ARE TOO LARGE TO UPLOAD.

NHTSA ODI #11102159

20,200 miles · May 31, 2018

Power Train

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WHILE DRIVING OR PARKED THE "TRANSMISSION SYSTEM PROBLEM" ILLUMINATED ON THE DASHBOARD. THE "D" LIGHT ALSO BEGAN FLASHING ON CONSOLE AND THEN CAR GOES INTO NEUTRAL BY ITSELF. IN ADDITION ANOTHER WARNING LIGHT CAME ON THE DASHBOARD THAT SAID "BLIND SPOT WARNING MALFUNCTION" FOLLOWED BY 3RD MESSAGE THAT SAID "TRANSMISSION SYSTEM PROBLEM" AND D LIGHT DISAPPEARS FROM DASHBOARD . WHEN DRIVING, THE CAR CONTINUES AT SAME RATE SPEED THANKFULLY. WHEN PARKED, CANNOT PUT VEHICLE IN PARK AND HAVE TO USE EMERGENCY BRAKE. WHEN THIS HAPPENS THE CAR CANNOT BE LOCKED SINCE IT RECOGNIZES CAR IN DRIVE. TAKING TO DEALERSHIP TOMORROW. I DON'T LIKE DRIVING THE CAR SINCE I'M CONCERNED IT WILL GO INTO NEUTRAL AS I'M DRIVING. I BELIEVE THIS COULD BECOME A SIGNIFICANT SAFETY ISSUE FOR MYSELF AND OTHER DRIVERS AT RISK. ANY TIME A CAR DOES THIS WITHOUT EXPLANATION ON THE HIGHWAY WARRANTS AN INVESTIGATION.

NHTSA ODI #11099060

16,000 miles · May 26, 2018

EnginePower Train

THE CAR OVERHEATED AND WAS LEAKING BLUE FLUID, STARTED SMOKING AND HAD A WEIRD CHIRPING NOISE COMING FROM THE ENGINE. THE CAR WAS PARKED AND WAS JUMPING ANOTHER CAR WITH A DEAD BATTERY.

NHTSA ODI #11098086

300 miles · May 4, 2018

Vehicle Speed Control

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TL* THE CONTACT OWNS A 2016 ACURA MDX. WHILE DRIVING APPROXIMATELY 5 MPH AND ATTEMPTING TO DEPRESS THE BRAKE PEDAL, THE VEHICLE INADVERTENTLY ACCELERATED WITHOUT WARNING. THE CONTACT STATED THAT THE FAILURE RECURRED SEVERAL TIMES. THE CONTACT ALSO STATED THAT WHEN THE GEAR WAS SHIFTED BETWEEN THE FOURTH AND FIFTH GEARS, WHILE DRIVING APPROXIMATELY 35 MPH, THE VEHICLE DID NOT ACCELERATE FOR ABOUT TWO SECONDS. THE VEHICLE WAS TAKEN TO ACURA OF MODESTO (4325 MCHENRY AVE, MODESTO, CA 95356, (209) 527-7000) WHERE IT WAS DIAGNOSED THAT THE VEHICLE WAS PERFORMING AS DESIGNED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT TO THE DEALER. THE FAILURE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 300.

NHTSA ODI #11091742

Official recalls

26V365000 · Structure:frame And Members; Suspension:rear

Jun 4, 2026

American Honda Motor Company (Honda) is recalling certain 2016-2022 Honda Pilot, 2017-2023 Ridgeline, 2019-2023 Passport, and 2014-2020 Acura MDX vehicles that were sold in Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, or Wisconsin. The rear subframe may corrode at the suspension mounting points, which can result in rear suspension component failure.

Consequence & remedy

Consequence: Failure of rear suspension components, such as the rear control arm, can cause a loss of vehicle handling and control, increasing the risk of a crash or injury.

Remedy: Dealers will inspect the rear subframe and install a rear subframe reinforcement kit and, as necessary, repair or replace the rear subframe components, free of charge. Interim letters notifying owners of the safety risk were mailed July 27, 2026. Additional letters will be sent once the final remedy is available, anticipated in the fall of 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's numbers for this recall are AOU and AOT. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov beginning June 10, 2026.

Additional source detail variants (2)

Suspension:rear

Consequence: Failure of rear suspension components, such as the rear control arm, can cause a loss of vehicle handling and control, increasing the risk of a crash or injury.

Remedy: Dealers will inspect the rear subframe and install a rear subframe reinforcement kit and, as necessary, repair or replace the rear subframe components, free of charge. Interim letters notifying owners of the safety risk were mailed July 27, 2026. Additional letters will be sent once the final remedy is available, anticipated in the fall of 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's numbers for this recall are AOU and AOT. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov beginning June 10, 2026.

Structure:frame And Members

Consequence: Failure of rear suspension components, such as the rear control arm, can cause a loss of vehicle handling and control, increasing the risk of a crash or injury.

25V259000 · Exterior Lighting; Interior Lighting

Apr 17, 2025

Honda (American Honda Motor Co.) is recalling certain 2014-2020 Acura MDX vehicles. Moisture may enter the tailgate lid light assembly and wiring harness, which can cause the interior and exterior lights to fail, including the lid lights, position lights, license plate lights and taillights.

Consequence & remedy

Consequence: Vehicle lights that fail to illuminate can decrease visibility and increase the risk of a crash.

Remedy: Dealers will inspect the wiring and install a fuse harness, replace the lid light, and repair the body dust sealer, as necessary, free of charge. Owner notification letters were mailed May 30, 2025. Owners may contact Acura's customer service at 1-800-382-2238. Acura's number for this recall is FLI. Vehicles included in this recall that were previously repaired under NHTSA recall number 19V-256 will need to have the new remedy completed.

Additional source detail variants (2)

Interior Lighting

Consequence: Vehicle lights that fail to illuminate can decrease visibility and increase the risk of a crash.

Remedy: Dealers will inspect the wiring and install a fuse harness, replace the lid light, and repair the body dust sealer, as necessary, free of charge. Owner notification letters were mailed May 30, 2025. Owners may contact Acura's customer service at 1-800-382-2238. Acura's number for this recall is FLI. Vehicles included in this recall that were previously repaired under NHTSA recall number 19V-256 will need to have the new remedy completed.

Exterior Lighting

Consequence: Vehicle lights that fail to illuminate can decrease visibility and increase the risk of a crash.

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.

19V256000 · Exterior Lighting; Exterior Lighting:tail Lights

Mar 28, 2019

Honda (American Honda Motor Co.) is recalling certain 2014-2019 Acura MDX and 2017-2019 Acura MDX Sport Hybrid vehicles. Moisture may enter the tailgate lid lights, possibly causing a loss of the tailgate lid lights and the taillights.

Consequence & remedy

Consequence: Loss of the taillights reduces the vehicle's visibility, increasing the risk of crash.

Remedy: Acura will notify owners, and dealers will modify the tailgate lid lights and install updated gaskets and a wiring sub-harness or will replace both tailgate lid lights. The repairs will be performed free of charge. The recall began May 7, 2019. Owners may contact Acura customer service at 1-888-234-2138. Acura's number for this recall is M49.

Additional source detail variants (2)

Exterior Lighting

Consequence: Loss of the taillights reduces the vehicle's visibility, increasing the risk of crash.

Remedy: Acura will notify owners, and dealers will modify the tailgate lid lights and install updated gaskets and a wiring sub-harness or will replace both tailgate lid lights. The repairs will be performed free of charge. The recall began May 7, 2019. Owners may contact Acura customer service at 1-888-234-2138. Acura's number for this recall is M49.

Exterior Lighting:tail Lights

Consequence: Loss of the taillights reduces the vehicle's visibility, increasing the risk of crash.

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.

16V417000 · Fuel System, Gasoline:storage:tank Assembly

Jun 9, 2016

Honda (American Honda Motor Co.) is recalling certain model year 2015 Acura MDX 2WD and MDX 4WD vehicles, 2016 Acura MDX 4WD vehicles, 2015-2016 Honda Odyssey vehicles, and 2016 Honda Pilot 2WD and 4WD vehicles. The affected vehicles have fuel tanks that were manufactured with insufficient welds which may separate and allow fuel to leak out.

Consequence & remedy

Consequence: A fuel leak in the presence of an ignition source may result in a fire.

Remedy: Honda will notify owners, and dealers will replace the fuel tanks, free of charge. Owners may contact Honda/Acura customer service at 1-888-234-2138. The recall began on July 29, 2016. Honda's numbers for this recall are KA9 (Honda vehicles) and KB0 (Acura vehicles).

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

PE25008 · Engine Failure

Opened Aug 20, 2025 · No close date supplied

Status: open (inferred from source dates) · Engine

The Office of Defects Investigation (ODI) has received 414 reports of connecting rod bearing failures in the 3.5L V6 engine used in the following vehicles: Model Years (MY) 2018-2020 Acura TLX, MY2016-2020 Acura MDX, MY2016-2020 Honda Pilot, MY2018-2020 Honda Odyssey, and MY2017-2019 Honda Ridgeline. The subject engine failures were analyzed as part of a Recall Query (RQ24013). It was determined that these engine failures are outside the scope of Honda Recall 23V-751. Further, evidence gathered in conjunction with RQ24013 does not suggest this failure is caused by the same crankshaft manufacturing defect that is addressed by Honda in Recall 23V-751. Based on analysis of data from RQ24013, NHTSA has closed that investigation. The significant number of reports of engine failure in vehicles outside the scope of RQ24013 presents a potential safety risk that warrants further investigation. ODI is opening this Preliminary Evaluation (PE) to further evaluate the scope and severity of the potential problem and to fully assess the potential safety-related issues. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

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

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

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

Engine And Engine Cooling:engine

RQ24013 · Engine Failure

Opened Nov 8, 2024 · Closed Aug 20, 2025

Status: closed (inferred from source dates) · Engine

On November 8, 2024, the Office of Defects Investigation (ODI) opened Recall Query RQ24013 to assess the scope of Honda recall 23V-751 after receiving complaints that alleged connecting rod bearing failures in vehicles that were not within the scope of recall 23V-751. In November 2023, Honda recalled 248,999 various Model Year (MY)2016–2020 Honda and Acura vehicles equipped with the 3.5L V6 engine. Honda recalled these vehicles due to a crankshaft manufacturing defect that caused premature connecting rod bearing wear and engine seizure. While the out-of-scope failures involved in these complaints appear to have a very similar failure mechanism as the recalled engines, a thorough analysis of all available data from Honda has not indicated that the same manufacturing defect exists in the out-of-scope engines as the engines recalled by 23V-751. Based on this analysis ODI has determined that Honda has properly defined the scope of recall 23V-751. Consequently, ODI will close this RQ investigation. NHTSA will continue to investigate these complaints of engine failure as part of a new Preliminary Evaluation Investigation (PE25008). The Agency reserves the right to take additional action if warranted by new circumstances.