2024 Honda Odyssey Powertrain (other) Problems

The vehicle's Auto Idle Stop (AIS) system failed to restart the engine after engaging at a complete stop. The affected components are the engine, starter motor, and AIS control software. The vehicle is available for inspection upon request. On XXX, at approximately 7:43 PM, the AIS system engaged while I was stopped at the intersection of [XXX]. Upon releasing the brake pedal, the engine failed to restart. The vehicle became fully immobilized in an active left-turn lane with traffic behind me. I was required to shift to Park and manually depress the Start button multiple times to restore power. Multiple vehicles behind me began sounding their horns. A minor child was a passenger in the vehicle. This is not an isolated incident. The vehicle has been presented to Howdy Honda, in Austin, Texas, for the same defect on three to four prior occasions. On the most recent prior visit, the dealer replaced the starter motor — the specific remedy prescribed by Honda Technical Service Bulletins 23-008 and 23-009. The vehicle was returned to me as repaired. The failure recurred the same day. The defect has been confirmed and repair attempted by the authorized Honda dealership. The manufacturer has been on notice of this defect class-wide since at least 2018. Prior to and during failure events, the instrument cluster displays a Red Exclamation Mark warning light and/or a "Brake System" warning light. These warnings first appeared in conjunction with the initial AIS failure events and recur with each subsequent incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11764348

Incident

Sep 15, 2026

My 2024 Honda Odyssey has repeatedly failed to restart after the Auto Idle Stop system shuts the engine off while stopped at a red light or in traffic. Normally, the engine should automatically restart when I release the brake, but on several occasions the vehicle completely shut down and I had to manually restart it. During one incident, the vehicle would not restart for approximately 1–2 minutes despite repeated attempts. This left the vehicle disabled in traffic and created a serious safety concern. The problem has occurred multiple times.

NHTSA ID

11764011

Incident

Sep 10, 2026

On 2 occasions now automatic Start/Stop system has failed to restart. First was approximately 5 weeks ago and Second was Monday 3 Aug 2026. Dealer on first occurrence said there was a loose wire. Have not been to Dealer on 2nd occurrence yet. Situation in both cases is the vehicle was seemingly operating normally with no warnings displayed and I stopped in traffic. When traffic cleared and I tried to proceed; the vehicle was non responsive and would not start when I activated the normal start sequence.

NHTSA ID

11755363

Incident

Aug 3, 2026

My 2024 Honda Odyssey has repeatedly failed to restart after the Auto Idle Stop system shuts the engine off at a red light. When I release the brake or press the accelerator, the engine does not restart as it should. The vehicle then shifts into Park or instructs me to place it in Park, and it is difficult to restart using the start button. This has left the vehicle disabled in an active traffic lane and creates a serious risk of being struck by another vehicle. I have been stuck at a red light with people honking at me and haven't been able to start the car for up to a minute. The problem is intermittent, and I do not know whether it is caused by the engine, electrical system, battery, starter, software, or power train. The Auto Idle Stop system should not shut the engine off if the vehicle may be unable to restart.

NHTSA ID

11750375

Incident

Jul 10, 2026

The vehicle failed to re-start after being engine had been at full operating temperature then was turned off for a short period of time. It has also struggled to re-start with auto start/stop leaving the vehicle partially in a busy intersection without any engine power until it successfully turned over several seconds after releasing the brake pedal. The dealer is unable to replicate. They have tested the starter and battery and confirmed both test good at ambient temperatures. No warning lamps. Once the vehicle cools, it is able to re-start again.

NHTSA ID

11749356

Incident

Jul 6, 2026

The vehicle has an automatic stop/start feature that is enabled by default, though there is a button readily accessible to deactivate the function easily ea. time the vehicle is operated. The vehicle has just had the starter replaced under warranty @ 25K miles. There have been issues with the vehicle struggling to start for at least six months now - rough, slow starts where the engine is struggling to turn over. If I forget to turn off the auto-start/stop function, the engine will sometimes shut off at a red light - but it won't turn on again when the light turns green and it's time to move. I have had this happen a handful of times in traffic - the engine turns off and will not restart when normal procedures are followed.

NHTSA ID

11748029

Incident

Jul 2, 2026

Yesterday my 2024 Odyssey auto stop engaged and the car wouldn’t restart in the traffic light. I had to turn the car off and try twice before it would restart.

NHTSA ID

11744429

Incident

Jun 15, 2026

The vehicle is experiencing an Auto Idle Stop (AIS) failure to restart from a complete stop. The engine dies, the electrical system resets, and it requires a manual button push or jumpstart to get moving again

NHTSA ID

11743427

Incident

Jun 22, 2025

For the past year, the vehicle's Auto Idle Stop system has intermittently failed to restart the engine after coming to a complete stop at traffic lights. This creates a dangerous situation where the vehicle is immobilized in active traffic, posing a significant risk of rear-end collisions or other accidents. I have taken the vehicle to an authorized Honda dealership for service; however, they were unable to duplicate the issue and declined to perform further repairs. As the problem remains unresolved, I am reporting this incident to the NHTSA to contribute to the official record of safety concerns regarding this feature in Honda vehicles.

NHTSA ID

11736192

Incident

May 1, 2025

My 2024 Honda Odyssey EX-L has a recurring Auto Idle Stop failure. About 1–2 times per week, when stopped at a light and Auto Idle Stop engages, the engine fails to restart properly when I release the brake. The engine sputters or shuts down, the battery warning light comes on, and the vehicle shifts itself into Park. I then have to hold the start button for several seconds to restart the engine. This creates a safety risk because the vehicle becomes disabled in active traffic when the light turns green. The vehicle was previously taken to a Honda dealer for this issue, and the battery was replaced, but the problem continues.

NHTSA ID

11733652

Incident

Apr 24, 2026

My car is experiencing the starting issue that is listed as auto start/stop feature. However, since I almost always have the AC on or start/stop disabled because the car will not start when hot after a few stops and was scared it would do it in traffic. So far I can get it started again but need to completely turn car off and try again, sometimes more than once. Had been going on for a year and the dealer has replaced battery then the next services said nothing wrong. Now the car is out of warranty and the starting issues getting worse and have finally found online that others are experiencing similar issues. I have forgotten to turn off start/stop a couple times and been stranded in traffic as well when car auto stopped at red light and did not restart causing me to be stuck until i could get it restarted.

NHTSA ID

11730007

Incident

Apr 8, 2025

I have had multiple issues with the radio (16000 miles). After many personal videos dealership was able to fix one of this issues with a new part (22000 miles). I was informed the other issues I was having with the radio was due to my battery not staying fully charged. I was also having issues with the van not starting right away, which made me feel I could get stranded. It took many attempts to get the van to start. The van also wouldn't let me reverse one time, with a message telling me to place van in park. Another issue is the van is very slow to restart from auto idle shut off. The transmission is slow to change gears in lower gears and the van jerks a little bit. Next my rotors were warped. I was informed by the dealership that there was nothing wrong with my transmission and the auto idle down was working properly. NO one could explain the rotors being warped. They reshaped my rotors and replaced the battery and told me they hoped that fixed the problem. Well indeed it did not fix the problem. As of 12/27/25 the van completely shut off at a stop sign and again on 12/28/25. The issue is only getting worse (24,000 miles) and now I am scared to death that the van will stop while i am driving. The dealership has been contacted and I am waiting on a call back for a loaner car. I was in traffic and was extremely worried about my safety, as well, the safety of others around me and with me. ( Side note I returned the van to another dealership soon after the first dealership performed work on the van, when I heard a metal on metal sound and what sounded like a bolt rolling around in my back brakes. They did not find anything wrong but were also puzzled by the rotors already being warped. I was afraid to make the trip to the orig dealership). I have recently gotten a video of the brakes scraping again. This van is causing a lot of safety issues for my family.

NHTSA ID

11707414

Incident

Oct 31, 2025

The start stop system has failed to restart at a busy traffic light more than half a dozen different times after a 1 hour drive. Short drives do not bring this issue out. This got me stuck at a light, drivers annoyed honking and confused as I try to get my vehicle to start again. Turning the van completely off and back on again seems to get the van to restart again. I tried bring the issue up to the dealer when I brought it in for its first service, but the employee was extremely rude/belligerent and stated they would only do an oil change when I asked for help with this safety issue among other things. Will take to another dealer next service interval and try again. No issues known or warning lights on the vehicle prior. The van when it did this, error'd stating failure to restart or something along those lines. It happened so fast I don't 100% recall. After the issue the van would have no issues or lights on at all to even think anything had went wrong in the first place. This is a 2024, purchased new, vehicle.

NHTSA ID

11705610

Incident

Oct 13, 2025

Transmission has hard shifts in lower gears. Causing the car to jump/jerk wich could cause driver to possibly loose control in wet road conditions.

NHTSA ID

11677379

Incident

Jul 2, 2025