Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2020 Honda Odyssey owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2020 Honda Odyssey. The contact stated while stopped at a traffic signal he was depressing the brake pedal to stop the vehicle, when the signal changed, and as he released the brake pedal, the vehicle was not turning on. The contact placed the vehicle in park (P) and restarted the engine. The contact stated that his vehicle is equipped with the Engine Off-On feature. The contact stated that the Off-On was also hesitating before he needed to place the vehicle into the park to restart. The contact stated no warning light was illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that a software update needed to be performed. The vehicle was repaired. The contact manually turned the feature off to prevent the failure from recurring. The manufacturer was not informed of the failure. …
The contact's daughter owns a 2020 Honda Odyssey. The contact stated that while his daughter was driving at an undisclosed speed, several unknown warning lights illuminated. The contact attempted to inspect the vehicle but could not determine the cause of the failure. The vehicle was taken to a dealer, where the contact was informed by the technician that the failure might be from the wiring connected to the rearview camera. The contact declined to pay for a diagnostic test. The contact attempted to repair and realign the rearview camera; however, the part needed to realign the camera could not be purchased and could only be serviced at a Honda dealer. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 130,000.
The contact owns a 2020 Honda Odyssey equipped with a Cabin Watch camera. The contact stated while driving at an undisclosed speed, the Lane Keeping Assist and the Cabin Watch camera became inoperable. Additionally, the contact stated that even though the Cabin Watch had become inoperable, the Cabin Watch plastic case was constantly burning hot. An independent mechanic diagnosed the vehicle and determined that the Cabin Watch camera needed to be replaced. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 102,000.
The contact owns a 2020 Honda Odyssey. The contact stated that five days after the vehicle was repaired under NHTSA Campaign Number: 26V332000 (Air Bags), while starting the vehicle, five warning lights were displayed. The Lane Assist warning light and the cruise control warning light was illuminated. The dealer was contacted, and the vehicle was diagnosed with a front-facing camera failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 55,000.
The contact owns a 2020 Honda Odyssey. The contact stated that on several occasions while stopped at a red light, the vehicle shut off unintendedly and had to be manually restarted. The battery warning light was occasionally illuminated. The vehicle was taken to a dealer where it was diagnosed, and the contact was informed that the battery needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was 39,000.
The contact owns a 2020 Honda Odyssey. The contact stated that while starting the vehicle, there were several unknown warning lights illuminated. The contact stated that several safety features were disabled during the failure. The vehicle was driven to a local dealer, where it was diagnosed, and determined that the front multi-purpose camera had experienced internal failures. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 6,000.
The contact owns a 2020 Honda Odyssey. The contact stated that on two occasions while driving with the idle stop feature engaged, while the vehicle was idling and stopped, the engine failed to restart as intended when the brake pedal was released. The vehicle was restarted and operated normally. The vehicle was then taken to a dealer however, the failure was not able to be duplicated. The manufacturer was notified of the failure. The failure mileage was approximately 88,000.
The contact owns a 2020 Honda Odyssey. The contact received notification of NHTSA Campaign Number: 23V431000 (Back Over Prevention). The contact stated that on several occasions while driving at various speeds, there was a static sound from from the radio. The vehicle was not diagnosed. The manufacturer was not notified of the failure. The failure mileage was approximately 20,000.
Recently, my 2020 Honda Odyssey required a new battery replacement. Shortly after the battery was replaced, the front camera system failed unexpectedly. This failure has caused a complete loss of all safety features dependent on the front camera, including but not limited to: Lane Keep Assist System (LKAS) Collision Mitigation Braking System (CMBS) Adaptive Cruise Control (ACC) Road Departure Mitigation System (RDM) A diagnostic assessment revealed that the front camera system needs replacement with an estimated cost of $1,200. This issue arose without any previous physical damage to the camera or windshield and appears to be electronic or firmware related. According to Honda, this happens frequently when a battery is replaced. Context of Vehicle History: This vehicle has already been subject to 11+ recalls, which have affected various major systems and components. …
The forward-facing camera and/or radar unit failed one morning while running errands, resulting in 5 separate ADAS system failures. With these safety features not working, our safety and the safety of others is at risk. We took it to our dealer and were told we would have to pay a diagnostic fee of $205, even though they clearly already knew what the problem was- based on the multiple complaints through NHTSA and various other forums and websites from Odyssey and other Honda model owners and across multiple years. The problem was confirmed by the dealer and they quoted us $2025 and we're still not sure if that includes just the camera and/or the radar unit, which is another $600 part. Other dealers have quoted only $1200 to fix the exact same thing, with others charging more than double that. …
Related recalls
Electrical system › Wiring
Honda (American Honda Motor Co.) is recalling certain 2018-2020 Odyssey vehicles. The wire harness for the third row seat accessory power outlet may get pinched between the unibody and rear trim panel, possibly damaging the wires and causing an electrical short.
Remedy: Honda will notify owners, and dealers will inspect the third row seat accessory power outlet wire harness for damage, replacing it as necessary.
Electrical complaints in other Odyssey years
Frequently asked questions
How common are electrical problems on the 2020 Honda Odyssey?
NHTSA has 172 complaints about the electrical system of the 2020 Honda Odyssey, 35% of the model year's 486 complaints. The component named most often is adas › driver monitoring › camera/sensor (2 mentions).
Is there a recall for 2020 Honda Odyssey electrical problems?
Yes — NHTSA recall 20V-066 (wiring, Feb 6, 2020). Recall repairs are free at authorized dealers.
At what mileage do 2020 Honda Odyssey electrical problems start?
Half of the complaints with a recorded mileage happened before about 6,000 miles, and 73% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 0 fires and 1 injury to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.