2024 Honda Odyssey

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.

AIS system. When vehicle engine temporary shuts off if fails to restart.

NHTSA ID

11775889

Incident

Nov 5, 2026

High Pressure Fuel Pump Problem on 2024 Odyssey, fairly New.

NHTSA ID

11775839

Incident

Jun 14, 2026

Idle Stopper on Complete STOP, Engine Remains off and never turn the engine ON. It is very danger in the middle of heavy traffic.

NHTSA ID

11775837

Incident

Nov 4, 2026

The contact owns a 2024 Honda Odyssey. The contact stated that while at a stoplight, the accelerator pedal was depressed and the vehicle stalled. The contact stated that the vehicle was taken to three dealers a total of five times. The contact stated that the alternator and the battery were replaced. The failure recurred. The contact stated that the battery failed to recharge. The failure mileage was approximately 300.

NHTSA ID

11775647

Incident

Dec 24, 2025

Mileage

300 mi

The SRS light came on. Took it to the Honda dealership and paid $210 for diagnostic. The diagnostic came back as faulty front passenger seat weigh sensor that needs to be replaced. To replace it, the cost is $1,097. There were recalls related to this problem NHTSA #26V332000, but my vehicle was not included in those recalls. Submitting this for consideration to include if similar problems are being reported.

NHTSA ID

11775503

Incident

Jul 2, 2026

Auto Idle-Stop (AIS) system: the engine shutting off and failing to restart. Happens constantly at intersections etc making it unsafe for me and my children. Someone could potentially crash into me etc as it takes longer for me to turn the car on, put it back in drive, and restart the engine. I have an appt at the dealer. Theres no warning, message or problems on the dash. It just shuts off. I also occasionally have a problem with my remote start, the engine wont turn over.

NHTSA ID

11774658

Incident

Oct 29, 2026

Engine fails to restart after Auto Idle Stop - stalled in traffic twice on consecutive days. On XXX around noon, at [XXX], I was first in line in the left-turn lane at a red light, with my [XXX] daughter and another adult passenger aboard. The Auto Idle Stop system shut the engine off. When the green left-turn arrow came on, the engine did not restart and a stall warning appeared on the dash. I had to confirm the van was in Park with the brake applied, turn the vehicle completely off with the start/stop button, and press the start button many times before the engine started. The van sat stalled at the front of the turn lane, blocking traffic, for roughly 60 seconds during the green arrow. The night before, XXX around 11 pm, the same failure happened in the left-turn lane on [XXX]: the engine shut off at the red light under Auto Idle Stop, did not restart when the green arrow came on, and I was stalled in traffic for roughly 60 seconds going through the same restart process. Since about late XXX the engine has also at times restarted roughly after Auto Idle Stop, even when it does not stall. I could not read the exact warning message because I was stalled in live traffic. A dealer has not yet inspected the problem; the vehicle is being taken to a Honda dealer for warranty diagnosis and is available for inspection. I am aware of NHTSA investigation EA25004 into restart failures after Auto Idle Stop on Honda vehicles, including 2018-2025 Odysseys. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11774533

Incident

Oct 29, 2026

While driving today at about 30 mph, the minivan suddenly braked on its own—despite there being no obstruction ahead—and began beeping. The word "Brake" appeared in large letters in the center of the panel, flashing, before suddenly releasing. My wife and I both suffered whiplash from the incident. There was nothing in front of the van; the only thing nearby was some cars parked on the curb along the side. My wife told me this has happened a couple of times before, and she reported it to Honda of Tomball. I'm very concerned that if we're driving at highway speeds and there are vehicles on both sides of our lane, this issue could occur again, and we could have a serious safety problem on our hands. In addition to this, we've been experiencing another issue: the van suddenly shifts into park when we come to a stoplight. This has happened three times. Yesterday they replaced the battery, but they still suspect it could be a starter issue.

NHTSA ID

11774517

Incident

Oct 29, 2026

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2027 Odysseys with a customer complaint of the rear sliding door latch being stuck, causing the door to remain open or closed. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to attempting a repair of any kind besides diagnosing the issue to corrosion on the latch.

Service Bulletin - Under certain circumstances, after coming to a stop and the auto idle stop feature engages, the vehicle may not automatically restart. In other circumstances, vehicles may experience a slow crank or fail to start under hot ambient temperature conditions.

Dealer Message - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. In other circumstances, vehicles may experience a slow crank or fail to start under hot ambient temperature conditions. The customer should be able to restart the vehicle by selecting Park and pushing the ENGINE START/STOP button.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2027 Odysseys with a customer complaint of the rear sliding door latch being stuck, causing the door to remain open or closed. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to attempting a repair of any kind besides diagnosing the issue to corrosion on the latch.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2027 Odysseys with a customer complaint of the rear sliding door latch being stuck, causing the door to remain open or closed. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to attempting a repair of any kind besides diagnosing the issue to corrosion on the latch.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2027 Odysseys with a customer complaint of the rear sliding door latch being stuck, causing the door to remain open or closed. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to attempting a repair of any kind besides diagnosing the issue to corrosion on the latch.