Owner-reported complaints naming the engine system, filed with NHTSA
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Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components. Every record below is an owner-reported complaint about the 2026 Honda Odyssey submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 13 reports on file name it.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Shown in the owner’s own words, exactly as filed
At a stop light the van turned off and would not turn back on...finally was able to get it to auto zone who said it was a bad battery, we then took it to honda with it only having 7k miles on it. They determined it was the starter from the auto/start/stop feature. What if this was the highway? A 2026 vehicle this should not happen to.
My AIS system kicked in causing the engine to shut off. Unfortunately, the engine did not restart. I was unable to start my car or even shift it to neutral for a helpful bystander to help me push my car off of the road. I was blocking traffic on a busy road and I am very fortunate that I was not rear ended. Eventually, after about half an hour, was able to get the car restarted (even then, lots of “clicking” and hesitation with starting). I then drove the vehicle home. I took it to Honda and they made me aware today that they were unable to get the car to repeat this problem, nothing was wrong, I could pick it up and let them know if it happened again.
Sitting at a light, the auto stop system activated and shut the engine off. When the light turned green, I took my foot off the brake and the engine failed to. Start and the entire electrical system shut off. The card was completely dead. I sat there for several minutes and I was able to restart the car.
While driving my 2026 Honda Odyssey, I stopped at a red light and the engine shut off through the Auto Idle Stop system. I pressed the Auto Idle Stop OFF button because I wanted the engine running again before proceeding. Instead of restarting the engine, the vehicle completely shut down and became inoperable in traffic. I repeatedly attempted to restart the vehicle, but it remained unresponsive for approximately 20 seconds before it finally restarted. This created a serious safety hazard because I was unable to move the vehicle while positioned in active traffic. This was not normal Auto Idle Stop operation, as the engine should have restarted when I pressed the button. This has happened several times already, where the car will not restart the engine. Requesting that NHTSA investigate possible Auto-Idle Stop/failure-to-restart problems affecting the 2026 Honda Odyssey.
While stopped at a red light, the Auto Stop/Start system shut off the engine as designed but then failed to restart it. The vehicle remained stalled in the intersection for several minutes while I attempted to restart the engine manually. This left the vehicle and my family stopped in traffic, creating a potential safety risk from surrounding vehicles. There were no warning lamps or messages prior to this incident or after.
While stopped at a red light- the idle stop engaged, but when released brake to go again, the engine failed to engage and I was not able to go- it then showed up on the instrument cluster to in order to drive- I needed to restart my vehicle. This has happened now 7 times in 9 months. 3 being in the last week.
Three times in the past week my van has shut off while I was preparing to move forward at a stop light. My car begins to idle as soon as it’s stopped, but when I lift my foot off the brake, instead of turning back on, my van engine shuts all the way off or jerks hard before acceleration. Resulting in me having to hurry and put my car in park & restart the engine. It’s very dangerous!
Starter Failed
2026 Honda Odyssey: Strong Exhaust/Fuel Odor in Cabin Causing Dizziness and Nausea I am submitting this complaint to report a potential safety issue involving a vehicle that is less than one year old. Beginning this past weekend, the vehicle suddenly began filling the passenger cabin with a strong exhaust-like odor during normal operation. The odor is severe enough that multiple occupants have experienced symptoms such as dizziness and nausea after spending approximately 10 minutes inside the vehicle. I visited my local Honda dealership to report the issue and seek assistance. According to the representatives I spoke with, Honda believes this is a known and widespread issue affecting multiple makes and models and that it is allegedly related to recent changes in gasoline formulation. I was further informed that Honda is aware of the issue, that engineering teams are working on a solution, and that there is currently no corrective action available to consumers. Honda also stated that, despite the odor, the condition does not involve toxic fumes and is only an odor concern. I am not ready to accept that explanation without further investigation. At this time: The condition began suddenly and without warning. The odor is strong and persistent. Occupants have experienced dizziness and nausea while riding in the vehicle. Honda has not identified a repair or mitigation. Honda has indicated that this may be a broader issue rather than an isolated vehicle defect. I am requesting that NHTSA review this matter to determine whether similar complaints have been reported and whether this condition warrants further investigation as a potential safety defect. I have also requested that Honda provide written documentation supporting its statements regarding: The alleged fuel-formulation cause of the issue. The assertion that occupants are not being exposed to harmful fumes. Any technical bulletins, engineering analyses, or communications related to this condition.
Idle stop function error during waiting at red light. Engine failed to restart so i had to turned it off and restarted the engine at the traffic light. Happened twice already. Idle stop system is defective need to be recalled
I own a 2026 Honda Odyssey Elite. On multiple occasions, the Auto Idle Stop system shut the engine off while stopped at a traffic light. When I released the brake pedal to proceed, the engine failed to restart, leaving the vehicle disabled in traffic. I was forced to shift the vehicle into Park and manually restart the engine using the Start/Stop button. This defect has occurred multiple times. I first reported the issue to my Honda dealership on June 2, 2026. After two visits where the dealer was unable to duplicate the concern, I captured the failure on video. During my third repair visit, the dealership's engineer personally experienced the failure twice while testing the vehicle. Honda Customer Relations opened a case and worked with the dealership. The dealership ultimately replaced the battery but advised me that this was only the next diagnostic step and not a confirmed root cause of the failure. This defect creates a significant safety hazard because the vehicle can become immobilized in an active traffic lane after the light turns green, exposing occupants to the risk of being struck by other vehicles.
The Auto Idle/stop caused my engine to stall not once but twice in the past few weeks while on a major highway. Light turns green and my car won't start back up. I have to let the car sit for a second then restart the car while traffic is flying past me on this highway. Absolutely ridiculous that my brand new car is having these issues and that I am unable to turn this feature off permanently.
My 2026 Honda Odyssey was stopped at a traffic light with Auto Idle Stop engaged. When traffic was ready to move, the engine appeared to restart for about half a second and then shut down. The vehicle then shifted itself into Park and would not resume normal operation. The battery warning light was illuminated. Pressing the engine Start/Stop button caused all of the screens/displays to turn off briefly, but they came back on in the same failed state. The vehicle was disabled in traffic at an intersection. The component or system that failed appears to be the Auto Idle Stop / engine restart system, possibly involving the starter, starter relay, battery/charging system, or engine control software. The vehicle is available for inspection upon request. My safety and the safety of others were put at risk because the vehicle unexpectedly failed to restart and became disabled while stopped at a traffic light, creating a traffic obstruction and risk of being struck from behind or causing other drivers to maneuver around the vehicle. The problem has not yet been reproduced or confirmed by a dealer or independent service center. UNKNOWN whether diagnostic trouble codes were stored. The vehicle/component has not yet been inspected by the manufacturer, police, insurance representatives, or others. There were no warning lamps, messages, or symptoms prior to the failure that I noticed. The battery warning light appeared after the engine shut down and the vehicle would not restart normally.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Categories with enough reports to have a page of their own
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