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2021 Honda Pilot

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2021 Honda Pilot do not stand out strongly from the model-year median of 239.5.

About this comparison →

When problems were reported

Mileage at the reported incident

Limited mileage data: 44 of 432 reports include usable mileage. There isn’t enough coverage to show a useful chart.

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.

  • Electrical System. Review the 126 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 104 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Forward Collision Avoidance. Review the 98 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 reports1 fire reports7 injury reports

Engine complaints

104 reports
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Mileage unknown · Dec 16, 2023
EngineUnknown Or Other

Auto start/stop function. The auto start/stop engaged and the vehicles engine stopped while we were at a red light. When the light turned green and I released the brake the starter engaged but very slowly and failed to start the engine. I attempted to start the vehicle again but it needed to be in park, which was taking time en…

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Auto start/stop function. The auto start/stop engaged and the vehicles engine stopped while we were at a red light. When the light turned green and I released the brake the starter engaged but very slowly and failed to start the engine. I attempted to start the vehicle again but it needed to be in park, which was taking time engaged. We were blocking other vehicles from making a protected turn during this. On the 3rd attempt to restart the vehicle restarted. This has not been inspected or or reproduced. No warning lamps other than vehicle must be in park to start.

NHTSA ODI #11560469

30,000 miles · Nov 29, 2023
Electrical SystemEngine

The contact owns a 2021 Honda Pilot. The contact stated that the Auto Idle feature on the vehicle intermittently failed to operate as needed. The contact stated that the vehicle failed to restart upon the depression of the accelerator pedal. The contact stated that an unknown message was displayed on the instrument panel during …

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The contact owns a 2021 Honda Pilot. The contact stated that the Auto Idle feature on the vehicle intermittently failed to operate as needed. The contact stated that the vehicle failed to restart upon the depression of the accelerator pedal. The contact stated that an unknown message was displayed on the instrument panel during the failure. The contact had taken the vehicle to the dealer on several occasions and software updates were performed; however, the failure returned soon after the updates were completed. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 30,000.

NHTSA ODI #11557431

Mileage unknown · Nov 2, 2023
EngineFuel/propulsion SystemCrashInjury

2021 Honda Pilot is subject to "rapid acceleration". We had no notification of this issue until the vehicle drove itself into our home on its own causing damage to the car and our home. Only after we did some research did we know Honda had this issue.

NHTSA ODI #11553197

Mileage unknown · Oct 27, 2023
Engine

This vehicle has some major concerns. I have issues with the starter on this thing not wanting to restart the engine after a traffic stop. Battery is fine and there are no obvious issues with the car other than the fact that the starter appears to barely spin the engine over the compression stroke. I have been a Honda owner f…

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This vehicle has some major concerns. I have issues with the starter on this thing not wanting to restart the engine after a traffic stop. Battery is fine and there are no obvious issues with the car other than the fact that the starter appears to barely spin the engine over the compression stroke. I have been a Honda owner for years but unless Honda issues a fix for this issue, i am finished with them. I continually turn off the auto stop/start feature out of fear that i will have issues at a traffic intersection. Please investigate this issue and force them to recall these vehicles. BTW my vehicle only has 28k miles on it so it is unacceptable for them to keep denying the issue exists when i take it to my dealer.

NHTSA ODI #11552338

Mileage unknown · Sep 9, 2023
EngineUnknown Or Other

The IDLE STOP feature sometimes fails to restart the vehicle after stopping at a stoplight or stop sign. The vehicle transmission will go into PARK, with the engine no longer running. This requires the vehicle to be restarted manually in traffic, and shifted to DRIVE. This puts the vehicle and passengers at risk for an accide…

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The IDLE STOP feature sometimes fails to restart the vehicle after stopping at a stoplight or stop sign. The vehicle transmission will go into PARK, with the engine no longer running. This requires the vehicle to be restarted manually in traffic, and shifted to DRIVE. This puts the vehicle and passengers at risk for an accident, as it blocks the normal flow of traffic until manually restarted and shifted. This car is available for inspection upon request. This problem has been inspected by a local Honda dealer. There were no warning lamps prior to the incidents.

NHTSA ODI #11543566

Mileage unknown · Sep 6, 2023
Engine

The Auto Idle system that enables the cut off the engine is now working intermittently some or not at all, regardless of temperature outside or inside the cabin. Note: Took to Honda Mall of GA dealership to look at this very issue, and according to the technician, it is 'heat' related. I feel this is 100% incorrect, as the tempe…

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The Auto Idle system that enables the cut off the engine is now working intermittently some or not at all, regardless of temperature outside or inside the cabin. Note: Took to Honda Mall of GA dealership to look at this very issue, and according to the technician, it is 'heat' related. I feel this is 100% incorrect, as the temperature in the evening has dropped into the 70s and the issue continues.

NHTSA ODI #11542857

Mileage unknown · Sep 1, 2023
EngineUnknown Or Other

The Auto Idle Restart Feature has malfunctioned a number times and cars behind us have almost rear-ended us. With Eco mode on or off, a/c on or off, it doesn't seem to make a difference. When the vehicle has Auto Idle Restart enabled, the vehicle is stopped at a stop light, the engine turns off, and when the user presses the …

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The Auto Idle Restart Feature has malfunctioned a number times and cars behind us have almost rear-ended us. With Eco mode on or off, a/c on or off, it doesn't seem to make a difference. When the vehicle has Auto Idle Restart enabled, the vehicle is stopped at a stop light, the engine turns off, and when the user presses the gas and releases the brake, the engine does not turn on. When the brake pedal is released, the brake lights turn off - the vehicles behind us drive forward as they think we are accelerating but our vehicle does not move as the engine does not turn back on properly. We are lucky we have not been rear ended yet. This is very unsafe, especially in very busy intersections.

NHTSA ODI #11542209

Mileage unknown · Aug 30, 2023
EngineUnknown Or Other

When the idle stop system is enabled in my vehicle, on 5 separate occasions, my car has stalled. Each situation happened when I was stopped at either a stop sign or traffic light. When I took my foot of the brake to go, the car shut off and took ~30 seconds before I was able to turn the engine back on and go. I took my car to …

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When the idle stop system is enabled in my vehicle, on 5 separate occasions, my car has stalled. Each situation happened when I was stopped at either a stop sign or traffic light. When I took my foot of the brake to go, the car shut off and took ~30 seconds before I was able to turn the engine back on and go. I took my car to the Honda dealer and they were unable to determine the cause of the problem, and it has happened since that time.

NHTSA ODI #11541693

Mileage unknown · Aug 20, 2023
EngineForward Collision AvoidanceFuel/propulsion System

Vehicle shut off while at a busy intersection light. Unable to restart the vehicle for several minutes. All safety systems (crash mitigation.....) were disabled. Unable to find a current recall through Honda and the dealership is closed since it is sunday.

NHTSA ODI #11539644

Mileage unknown · Jul 31, 2023
Electrical SystemEnginePower Train

Honda Pilot 2021 Elite AWD w/ 34k miles shuts down at a complete stop e.g. traffic light, stop sign or highway stop and go rush hour. Panel says put in Neutral, but the push button transmission shift does not respond. Attempts to restart with the push start/stop button and fails multiple times first and then it starts again, wh…

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Honda Pilot 2021 Elite AWD w/ 34k miles shuts down at a complete stop e.g. traffic light, stop sign or highway stop and go rush hour. Panel says put in Neutral, but the push button transmission shift does not respond. Attempts to restart with the push start/stop button and fails multiple times first and then it starts again, while other motorists are honking behind you for blocking traffic. Major safety concern.

NHTSA ODI #11535565

Official recalls

10

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

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: 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

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: 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.

26V332000 · Air Bags:sensor:occupant Classification:front Passenger

May 21, 2026

Honda (American Honda Motor Co.) is recalling certain 2018-2021, 2023 Acura TLX, 2019-2024 RDX, 2017-2020, 2022-2026 MDX, 2017-2021, 2023, 2025 Honda Ridgeline, 2017-2022 Pilot, 2019-2021 Passport, 2018-2026 Odyssey, 2019-2022 Insight, 2019-2021 HR-V, 2018-2020 Fit, 2020-2022 CR-V Hybrid, 2017-2022 CR-V, 2017-2018, 2021 Civic Type R, 2017-2021 Civic hatchback, 2016-2020 Civic coupe, 2016-2022 Civic, 2017-2022 Accord Hybrid, and 2016-2022 Accord vehicles. The front passenger seat weight sensor may crack and short circuit, which can cause the air bags to deploy unintentionally during a crash.

Consequence & remedy

Consequence: Air bags that deploy unintentionally during a crash increase the risk of injury.

Remedy: Dealers will replace the seat weight sensors, free of charge. Owner notification letters were mailed July 7, 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's numbers for this recall are BOL, WO9, OOA, WOM, XOH, NOC, POD, BOE, UOF, POB, EOG, AOI, QO8, TOJ, DO7, and SOK. This recall expands previous NHTSA recall number 24V064. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning May 29, 2026.

24V064000 · Air Bags:sensor:occupant Classification:front Passenger

Feb 1, 2024

Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura RDX, and 2020-2021 Acura TLX vehicles. The front passenger seat weight sensor may crack and short circuit, failing to suppress the air bag as intended.

Consequence & remedy

Consequence: An air bag that deploys unintentionally during a crash can increase the risk of injury.

Remedy: Dealers will replace the seat weight sensors, free of charge. Owner notification letters were mailed March 28, 2024. This is a phased recall. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls are XHP and VHQ.

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.

23V458000 · Service Brakes, Hydraulic:foundation Components:master Cylinder

Jun 29, 2023

Honda (American Honda Motor Co.) is recalling certain 2020-2021 Civic, 2020-2023 Ridgeline, 2021-2023 Passport, 2021-2022 Pilot, and 2020 Acura MDX vehicles. The tie rod fastener that connects the brake booster and the brake master cylinder may have been improperly assembled during manufacturing, which can cause the brake master cylinder to separate from the booster assembly.

Consequence & remedy

Consequence: Brake master cylinder separation can cause a loss of brake function and increase the risk of a crash.

Remedy: Dealers will inspect and repair the brake booster assembly as necessary, free of charge. Owner notification letters were mailed August 7, 2023. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are VEU, AEV, and ZET.

23V431000 · Back Over Prevention:display Function

Jun 15, 2023

Honda (American Honda Motor Co.) is recalling certain 2018-2023 Odyssey, 2019-2022 Pilot, and 2019-2023 Passport vehicles. Due to a faulty Media Oriented Systems Transport (MOST) communication coaxial cable connector, the rearview camera image may not appear on the display. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Consequence & remedy

Consequence: A rearview camera that does not display an image can reduce the driver's rear view, increasing the risk of a crash or injury.

Remedy: Dealers will replace the MOST cable harness and install a straightening cover over the vehicle cable connector, free of charge. Owner notification letters were mailed July 24, 2023. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are EEL, ZEM, and SFC.

23V174000 · Visibility:rearview Mirrors/devices:exterior

Mar 16, 2023

Honda (American Honda Motor Co) is recalling certain 2020-2021 Pilot and Ridgeline, and 2020-2022 Passport and Odyssey vehicles. The heating pads behind both side-view mirrors may not be bonded properly, allowing the mirror glass to detach. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Consequence & remedy

Consequence: Detached mirror glass can reduce driver visibility, increasing the risk of a crash.

Remedy: Dealers will replace both left and right side-view mirrors, free of charge. Owner letters were mailed January 17, 2024. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is FE5.

20V725000 · Tires

Nov 20, 2020

American Honda Motor Co. (Honda) is recalling certain 2021 Pilot vehicles equipped with Continental CrossContact LX Sport 245/50R20 102 H tires with DOT serial number A376 D3K9 2920 and mold numbers S-421920 and S-421921. The tires may have been cured for a time beyond the specification limits.

Consequence & remedy

Consequence: Over-cured tires may develop a break in the sidewall resulting in sudden air loss or a belt edge separation which could lead to a tread/belt loss. Either condition can cause a loss of vehicle control, increasing the risk of a crash or injury.

Remedy: Honda will notify owners, and dealers will inspect all four tires and replace the tires that have the affected DOT serial number and mold number, free of charge. The recall began January 11, 2021. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is U8Y.

20V439000 · Back Over Prevention: Sensing System: Camera; Electrical System:software

Jul 28, 2020

Honda (American Honda Motor Co.) is recalling certain 2018-2020 Odyssey, 2019-2020 Passport, and 2019-2021 Pilot vehicles. Incorrect instrument panel control module software can cause the instrument panel to not display critical information, such as engine oil pressure, speedometer, and gear selector position until the next ignition cycle. Additionally, it can prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Control and Displays" and 111, "Rearview Mirrors."

Consequence & remedy

Consequence: Operating a vehicle without a functioning instrument panel or rearview camera display increases the risk of a crash.

Remedy: Honda will notify owners, and dealers will reprogram the instrument panel control module software, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is T89.

Additional source detail variants (2)

Back Over Prevention: Sensing System: Camera

Honda (American Honda Motor Co.) is recalling certain 2018-2020 Odyssey, 2019-2020 Passport, and 2019-2021 Pilot vehicles. Incorrect instrument panel control module software can cause the instrument panel to not display critical information, such as engine oil pressure, speedometer, and gear selector position until the next ignition cycle. Additionally, it can prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Control and Displays" and 111, "Rearview Mirrors."

Consequence: Operating a vehicle without a functioning instrument panel or rearview camera display increases the risk of a crash.

Remedy: Honda will notify owners, and dealers will reprogram the instrument panel control module software, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is T89.

Electrical System:software

Honda (American Honda Motor Co.) is recalling certain 2018-2020 Odyssey, 2019-2020 Passport, and 2019-2021 Pilot vehicles. Incorrect instrument panel control module software can cause the instrument panel to not display critical information, such as engine oil pressure, speedometer, and gear selector position until the next ignition cycle. Additionally, it can prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Control and Displays" and 111, "Rearview Mirrors."

Consequence: Operating a vehicle without a functioning instrument panel or rearview camera display increases the risk of a crash.

Remedy: Honda will notify owners, and dealers will reprogram the instrument panel control module software, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is T89.

20V440000 · Back Over Prevention: Sensing System: Camera; Electrical System:software

Jul 28, 2020

Honda (American Honda Motor Co.) is recalling certain 2019-2021 Pilot, 2019-2020 Odyssey and 2019-2020 Passport vehicles. Incorrect central network software programming may cause several errors to occur that can delay or prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."

Consequence & remedy

Consequence: A delayed or inoperative rearview camera display can reduce the driver's view of what is behind the vehicle, increasing the risk of a crash.

Remedy: Honda will notify owners that updated software is available. Owners have the option to either follow the mailed instructions to download and update the software for free, or visit a dealer to have the software update performed, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is Y7Y.

Additional source detail variants (2)

Back Over Prevention: Sensing System: Camera

Honda (American Honda Motor Co.) is recalling certain 2019-2021 Pilot, 2019-2020 Odyssey and 2019-2020 Passport vehicles. Incorrect central network software programming may cause several errors to occur that can delay or prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."

Consequence: A delayed or inoperative rearview camera display can reduce the driver's view of what is behind the vehicle, increasing the risk of a crash.

Remedy: Honda will notify owners that updated software is available. Owners have the option to either follow the mailed instructions to download and update the software for free, or visit a dealer to have the software update performed, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is Y7Y.

Electrical System:software

Honda (American Honda Motor Co.) is recalling certain 2019-2021 Pilot, 2019-2020 Odyssey and 2019-2020 Passport vehicles. Incorrect central network software programming may cause several errors to occur that can delay or prevent the rearview camera image from displaying. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."

Consequence: A delayed or inoperative rearview camera display can reduce the driver's view of what is behind the vehicle, increasing the risk of a crash.

Remedy: Honda will notify owners that updated software is available. Owners have the option to either follow the mailed instructions to download and update the software for free, or visit a dealer to have the software update performed, free of charge. The recall began September 23, 2020. Owners may contact Honda customer service at 1-888-234-2138. Honda's number for this recall is Y7Y.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

1

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.