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

29,000 miles · Jan 20, 2020

Power Train

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SINCE WE PURCHASED THIS CAR WE HAVE ISSUES WITH THE VEHICLE WHERE IT IS HESITATING TO ACCELERATE WHEN GOING FROM 0 MPH TO 30 MPH. WE TOOK IT TO THE DEALERSHIP AND THEY UPDATED THE SOFTWARE FOR THE POWERTRAIN BUT STILL THE VEHICLE HAS ACCELERATION ISSUES WHEN GOING FROM 0 TO 40 MILES PER HOUR. WE HAVE RESEARCHED THIS ISSUE ON INTERNET AND IT SEEMS LIKE LOTS OF PEOPLE OWNING ACURA ARE HAVING THIS ISSUE. THIS ISSUE IS ATTRIBUTED TO NEW 7 SPEED TRANSMISSION THAT ACURA BUILT. IT LOOKS LIKE A SAFTEY ISSUE SINCE THE VEHICLE WOULD NOT ACCELERATE AFTER STOPPING AT TRAFFIC LIGHT OR STOPPING TO TAKE RIGHT AND RE ACCELERATING.

NHTSA ODI #11300557

200 miles · Dec 19, 2019

Exterior LightingPower TrainSuspension

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VEHICLE ACCELERATION IS SLUGGISH AT STOP AND GO. DURING HIGHWAY SPEED, IF TRANSMISSION IS IN LOW CRUISING GEAR AND YOU NEED TO ACCELERATE, TRANSMISSION IS SLUGGISH. ISSUES WAS CORRECTED AT DEALER. DEALER FOUND 1 FAULTY TRANSMISSION COMPUTER CODE. NEW SYMPTOMS AFTER COMPUTER FIX, OVER ACCELERATION AND HARSH SHIFT POINTS. DEALER ADVISED TO DRIVE 500 MILE AFTER COMPUTER REFLASH. INTERIOR LIGHT DO NOT DIM AFTER A FEW SECONDS. INTERIOR LIGHTS WILL NOT TURN OFF REGARDLESS OF LOCKING VEHICLE. REAR SUSPENSION HAS A 0.55 CAMBER DIFFERENCE, VEHICLE HAS 26,765 MILES. I ASKED DEALERSHIP SERVICE TO LOOK AT THIS ISSUE. DEALER NEVER ADVISED ON ISSUES.

NHTSA ODI #11290005

34,700 miles · Dec 2, 2019

Power TrainVehicle Speed Control

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NOVEMBER 10, 2019 TRAVELING ON HIGHWAY AT ~65 MPH, PRESSED ACCELERATOR TO PASS CAR AND VEHICLE WOULD NOT SPEED UP...FELT LIKE THE CAR WAS IN NEUTRAL. AFTER ABOUT 7 TO 10 SECONDS THE TRANSMISSION FINALLY KICKED IN AND THE CAR ACCELERATED. IF THIS HAPPENED ON A 2 LANE ROAD THE LACK OF TRANSMISSION DELIVERING POWER TO WHEELS COULD HAVE RESULTED IN A HEAD ON COLLISION. SERVICE APT SCHEDULED WITH ACURA DEALERSHIP WHERE PURCHASED AND WAS TOLD THEY COULD FIND NO 'CODES' OR ALERTS IN CARS COMPUTER AND THAT THEY FOUND NOTHING WRONG. THE DID SAY THEY REPROGRAMMED THE TRANSMISSION SOFTWARE...BUT THEY HAVE DONE THAT 2 OTHER TIMES. CAR HAS ONLY 35K MILES ON IT AND WE HAVE BROUGHT CAR INTO ACURA DEALERSHIP 4 TIMES TO ADDRESS THE HARSH SHIFTING OF TRANSMISSION AND TOLD THEM EACH TIME WE FELT IT WAS A SERIOUS SAFETY CONCERN. THE ABOVE INCIDENT OF NO POWER WHEN ATTEMPTING TO PASS ON HIGHWAY IS THE FIRST TIME THAT HAS HAPPENED..BUT IS A VERY SERIOUS CONCERN. WE WERE TOLD FOR THE 3RD TIME THAT THE HARSH SHIFTING AND GEAR-WANDERING WAS A 'CHARACTERISTIC' OF THIS MAKE / MODEL CAR AND THAT ACURA HAS BEEN TRYING TO ADDRESS THE ISSUE WITH TRANSMISSION SOFTWARE UPDATES. I HAVE SEEN MANY ONLINE COMPLAINTS OF THE "GEAR-WANDERING' TRANSMISSION ISSUE ONLINE AND HAVE ALSO READ SIMILAR SAFETY COMPLAINTS OF CAR LOSING TRANSMISSION POWER AT HIGHWAY SPEEDS. PLEASE THOUGHTFULLY REVIEW THIS COMPLAINT AND CONTACT ME IF YOU NEED ADDITIONAL INFORMATION. WE FIRMLY BELIEVE THAT THE KNOWN REPORTED ISSUES OF THE 2016 ACURA MDX SHAWD TRANSMISSION PROBLEMS ARE A HUGE SAFETY ISSUE. THIS 7 SEATER SUV IS DRIVEN BY MANY FAMILIES!

NHTSA ODI #11286445

74,000 miles · Nov 7, 2019

Power Train

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EXPERIENCE THREE DIFFERENT SCENARIOS WHERE THE TRANSMISSION EITHER APPEARS TO SHIFT INTO NEUTRAL OR GEARS GRINDING. 1) SHIFTING FROM PARK TO DRIVE, THE VEHICLE ALL OF A SUDDEN STALLS AND ENGINE REVS UP WITHOUT ANY MOTION. RESOLVED BY SHIFTING VEHICLE BACK TO PARK, AND THEN TO DRIVE. 2) WHEN VEHICLE IS IN-MOTION AT HIGHWAY SPEEDS BETWEEN 40-70 MPH, ALL OF A SUDDEN VEHICLE LOSES ACCELERATION POWER AND SPEED DECREASES FOR 3-4 SECONDS FORCING OTHER VEHICLES FROM BEHIND TO EITHER BRAKE OR SLOW DOWN. OFTEN OCCURS WHILE MERGING ONTO THE HIGHWAY OR LANE CHANGES WHERE ACCELERATION IS REQUIRED. 3) WHILE DRIVING ON NORMAL STREETS AT 30-40 MPH, GEARS GRIND FOR APPROXIMATELY 1-2 SECONDS WITHOUT LOSING ACCELERATION.

NHTSA ODI #11278645

65,211 miles · Oct 29, 2019

Engine

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MY 2016 MDX HAS A FUEL PUMP FAILURE WHICH HAS CAUSED MY MDX TO STALL AND LED TO PROBLEMS WITH MY FUEL INJECTORS. THERE IS A RECALL BUT MY ACURA DEALER REFUSES TO HONOR IT. ON 10/18 MY WIFE WAS DRIVING THE CAR ON THE FREE WAY AND IT SLOWED TO A STALL. THIS IS A KNOWN ISSUE. I HAVE PASTED A URL TO THE RECALL BELOW. THE DEALER REFUSED TO FIX MY FUEL INJECTORS OR REPLACE MY FUEL PUMP. THE ARE OFFERING A FREE FUEL PUMP SOFTWARE UPGRADED BUT THEY WANT ME TO PAY TO REPLACE THE FUEL PUMP AND FUEL INJECTORS. HTTPS://WWW.CONSUMERREPORTS.ORG/CAR-RECALLS-DEFECTS/HONDA-ACURA-RECALL-POTENTIAL-STALLING-ISSUE-ACCORD-MDX-TLX/

NHTSA ODI #11271772

37,768 miles · Oct 27, 2019

Suspension

THE FRONT DRIVER SIDE SUSPENSION IS MAKING A CLUNKING SOUND WHEN DRIVING OVER A SPEEDBUMP OR POTHOLES OR WHEN TURNING. THE VEHICLE SWAYS- PITCHING AND ROLLING.

NHTSA ODI #11271354

50,000 miles · Oct 26, 2019

Air BagsService BrakesStructureCrashInjury

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I WAS APPROACHING A STOP LIGHT ON A BUSY STREET ON A VERY BRIGHT DAY AND DID NOT SEE THAT THE STOP LIGHT I WAS APPROACHING HAD TURNED RED. WHEN I REALIZED IT WAS RED, I BRAKED RAPIDLY OF COURSE BUT STILL GOING AT A PRETTY GOOD SPEED I HIT THE STOPPED CAR IN FRONT OF ME. THE COLLISION WAS BETWEEN DRIVERS SIDE OF MY MDX AND RIGHT REAR OF A MEDIUM-SIZED WHITE JEEP. MY 17 YR OLD SON WAS IN THE FRONT PASSENGER SEAT AND HIS AIR BAG DEPLOYED, HOWEVER MY DRIVER BAG DID NOT DEPLOY. BOTH SEAT BELTS LOCKED UP. THE IMPACT WAS VERY STRONG ON DRIVER SIDE GIVEN THAT IS WHERE WE HIT. FORTUNATELY, MY SEAT BELT KEPT ME FROM HITTING THE WINDSHIELD. MY ONLY INJURIES ARE NECK ACHE, HEAD ACHE, SEAT BELT BRUISES, AND RINGING EARS. MY CONCERN IS FOR FUTURE USE OF MY CAR. IF THE DRIVER AIR BAG DID NOT DEPLOY GIVEN THIS HARD OF A HIT, I DO NOT BELIEVE IT WILL DEPLOY IN ANY COLLISION. I FILED A COMPLAINT WITH ACURA REQUESTING THEM TO INSPECT THE AIRBAG AND BLACK BOX TO DETERMINE WHY IT DID NOT DEPLOY AND THEY SAID THAT AIRBAGS ARE DESIGNED TO ONLY DEPLOY WHEN NEEDED AND IN THIS CASE THE CARS COMPUTER DETERMINED IT WAS NOT NEEDED HENCE THERE IS NO REASON TO INSPECT IT FURTHER. I BELIEVE THAT IF THE AIRBAG DEPLOYED ON THE PASSENGER SIDE WHERE THE IMPACT WAS LESS THEN THE AIR BAG SHOULD HAVE ALSO DEPLOYED ON THE DRIVER SIDE. MY INSURANCE ADJUSTER ALSO SUPPOSEDLY REQUESTED ACURA TO INSPECT THE VEHICLE AND THEY ALSO DID NOT GET ANY FAVORABLE ACTION FROM ACURA. HONDA/ACURA OF AMERICA RETURNED MY PHONE CALLS TWICE AND SIMPLY SAID THERE IS NO SUPPORTING INFORMATION INDICATING THAT THE AIRBAG OR CARS COMPUTER SHOULD BE INVESTIGATED. THEY ALSO DID NOT ASK ANY QUESTIONS ABOUT THE ACCIDENT IN WHICH ADDITIONAL INFORMATION COULD BE PROVIDED. THE ESTIMATED REPAIR ON THE CAR IS OVER $12K.

NHTSA ODI #11271252

92,321 miles · Oct 21, 2019

EngineUnknown Or Other

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APRIL 25,2019 DRIVING FROM ILLINOIS TO MS AT 75 MPH ON INTERSTATE AND APPLIED BREAK FOR UPCOMING CONSTRUCTION ZONE AND ALL WARNING SYSTEM LIGHTS FLASH THROUGH DASH AND CARE IMMEDIATELY STARTED SLOWING AND HAD NO ACCELERATION AT ALL. DISABLED ALL SAFETY FEATURES. ROAD DEPARTURE, BRAKE SYSTEM, ECT. PULLED OVER TO SIDE OF ROAD. RESTARTED SEVERAL TIMES AND ALL BUT TWO LIGHTS REMAINED ON SO CALLED DEALER. TWO LIGHTS REMAINED FLASHING AND CAR NOW SEEMED TO DRIVE OK SO COULD BE BROUGHT TO DEALER ABOUT 80 MILES AWAY. MEMPHIS ACURA DEALER WANTED TO KEEP CAR BECAUSE THEY INDICATED TRANSMISSION ISSUE BUT SINCE LIGHTS WERE RESET THEY SAID TAKE TO DEALER IF COMES ON AGAIN. MILEAGE 92,321. CALLED PEORIA IL ACURA DEALER A WEEK LATER TO CHECK ON ISSUE AND THEY SAID CODE WAS IMPLY A GLITCH. JULY 28, 2019 DRIVING 40 MPH IN TOWN AND ALL SAFETY LIGHTS CAME ON DASH. DISABLE ED ALL SAFETY FEATURES OF VEHICLE. RESTARTED SEVERAL TIMES AND EVENTUALLY ALL LIGHTS BUT TWO REMAINED ON. A FEW HOURS LATER ALL LIGHTS WERE NOW OFF. MAKE APPOINTMENT WITH PEORIA IL ACURA DEALER. MILEAGE 97,974. PEORIA DEALER SAID THE LIGHTS SOME ON BECAUSE WE NEEDED OUR 105,000 SERVICING WHICH INCLUDES ABOUT $1500 IN SERVICE LIKE PLUGS AND TIMING BELT. I CHALLENGE THEIR CLAIM (NOT AT THE MILEAGE) THAT ACURA WOULD CAUSE A SERIOUS SAFETY ISSUE FOR US ALL TO GET US TO DO THE SERVICE. THEY SAID UNFORTUNATELY THAT IS WHAT HAPPENS. NEXT WEEK HAD SPARK PLUGS REPLACED SINCE THEY SAID THAT CAUSED MISFIRE CODE. AUGUST 21 2019 AT 99,800 MILEAGE DRIVING 40 MPH ALL SAFETY LIGHTS ON CAR LOST POWER AND HESITATED AND THEN QUICKLY WENT OFF. OCTOBER 6 2019 AT 105,392 MILEAGE DRIVING ON INTERSTATE IN ILLINOIS AT ABOUT 75 MPH AND APPLIED BREAK FOR REST STOP AND ALL LIGHTS ON AND THIS TIME RPMS ROSE TO BETWEEN 5/6. DROVE 20 MPH ON SIDE TO REST STOP. RESTARTED SEVERAL TIMES AND ONLY TWO LIGHTS REMAINED. CAR DRIVABLE.

NHTSA ODI #11269881

49,000 miles · Oct 20, 2019

Engine

TRANSMISSION SLIPS WHEN ACCELERATING. I WAS TRYING TO PASS A LARGE TRUCK ON A TWO LANE HIGHWAY AND THE CAR STOPPED ACCELERATING AS I WAS TRYING TO PASS THE TRUCK IN THE OTHER LANE. I HAD TO HIT BRAKES TO COAST BACK BEHIND TRUCK WHILE I WAITED FOR TRANSMISSION TO REENGAGE. RPMS DROPPED TO 0 DURING THIS EVENT. CAR WAS IN TO DEAL…

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NHTSA ODI #11269782

20,057 miles · Oct 16, 2019

Air Bags

AIR BAG ALERT LIGHT CAME ON WITH RED AIRBAG AND STEERING WHEEL SIGN. TAKING IT TO DEALER TOMORROW, AND WILL UPDATE TOMORROW. THIS HAPPENED WHILE I WAS DRIVING STRAIT ON FREEWAY.

NHTSA ODI #11269036

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.