2020 Honda Odyssey Complaint Log

5 alerts came on the dash stating lane keeping assist problem , collision mitigation problem , auto high beam problem, forward collision problem and brake system warning. All safety features on my vehicle have failed. I

rear tailgate window spontaneously shattered

The rear passenger side tire hit a pothole and it caused all of the airbags to deploy on April 6, 2026. The impact should not have set the airbags off. This has caused a severe rash/burn on my son's face and neck. The vehicle is now being totaled by my insurance company and forcing me to have to purchase a new vehicle and my insurance rates to go up. Three days later, April 9, 2026, a safety recall on the over-sensitive airbags was issued for this Odyssey. There were no other warnings leading up to this. Insurance has inspected the vehicle and deemed it a total loss.

With no preceding accident or damage, the vehicle suddenly received multiple warning lights on the dash, including: "Adaptive Cruise Control Problem", "Lane Keeping Assist Problem", "Collision Mitigation System Problem", "Road Departure Mitigation System Problem", ""Auto High-Beam Problem", and a Brake System Caution Light. I attempted turning the car off and back on again, disconnecting the battery for 20 minutes, and reconnecting, and checked all fuses that were accessible. It appears the problem is related to the Multipurpose Camera (Honda Part #: 36160-THR-A91-M1). This appears to be a common issue. This manufacturing defect primarily effects safety systems and is common on a car that is primarily marketed towards the transport of families and children. I find this defect to be unacceptable and STRONGLY believe that it warrants a recall by the manufacturer.

The power liftgate will not operate and the tailgate will not latch closed. The van was parked outside during a heavy rain, and when the vehicle was started afterward, a warning was displayed on the dash. The van has not been checked by the manufacturer. An inspection is available on request.

Front camera is bad or faulty, triggering all adaptive cruise control, lane keep assist, auto high beam etc errors on dashboard, rendering the car not able to start or die in the middle of the road/traffic when the engine goes into idle mode while stopping at red lights. My odessey has over 111k miles when these issues start showing, but lots of people report experiencing same issue with even with their newer odessey. It doesn’t feel right why Honda installed cheap cameras especially when it plays a crucial role involves safety of the car and the driver.

The same power tail gate issue as experienced by many others on models 2018-2022. Water intrusion causing the power module fail for auto operation of powerlift tail gate.

Car leaks. Cargo Bay fills with water. Possible mold issues. I am told this leaking causes damage to the control module for the tailgate. Our tailgate will close on us and has almost closed on our children. We have to be very careful when the children are around the tailgate because it will begin to close without warning.

My vehicle started cycling between all of the check engine types of lights to include the emissions system. When taking it to my local Honda dealership, they determined that it was my front camera (multi-purpose camera internal failure). After some research and speaking to the service department, this major safety failure has been happening to many other Honda vehicles. The emissions system failure seems to also be a faulty design. I feel that the camera system failure could have resulted in an accident or major injury. And of no fault of my own. My vehicle is regularly maintained and is merely 6 years old. I should not be replacing a mayor system like the front camera every 6 years.

The Multipurpose Camera failed. Searches online and discussion with the dealers show this is a common problem. Result is shutdown of collision mitigation systems, blind spot indicators, lane divergence system, auto high beam, etc.

The radar is broken leaving all ADAS unusable in addition to no option to use cruise control.

After being on idle on a stop light, when releasing the brake to go, warning on dash says "Collision Mitigation Warning" when nothing hit the car and I'm there's enough distance with the car in front and behind. The severity has increased now, after being idle, when releasing the brake, it now completely shuts off, dash says "Shift to Park", and can't go, unless I push the ignition button. Took it 3x for the same errors on dash, Honda said the 1st time it was low battery, battery was running on low juice and didnt have power to come back from idle, they changed the battery. Now they say they need to replace the starter after few thou$and$. I see online this happening to others too. I fear the car behind me, may rear end me, because I can't go, green light is on, but I can't move as I'm re-starting the vehicle after being on idle. Honda says my VIN is not part of the bad batch. It's happening more frequently and Honda said they were able to replicate.

System failure for all of the safety-related assistants. Works intermittently, but mostly indicates failure.

Following replacement of the small block in Dec. 2025 for bad pushrod bearings. The vehicle ran for 3000 miles, before the engine seized up again while driving at 50 mph. The vehicle came to a stop in the travel lanes and could not be moved due to engine failure. Upon having the vehicle towed back to the dealership for inspection and repair, they found that the #3 cylinder had both valves broken and metal pieces shavings found in the engine. The dealer claimed that this was not related to the previous replacement of the small block as they did not work on the headers. However I believe the original issue of the bad pushrod bearings caused poor oil flow to the headers and the valves were already worn before the Dec. 2025 engine seizure. The dealer has now replaced the small block (for a 2nd time) headers, intake manifold, injectors and timing chain.

Getting error code for safety sinsing. Lane keep assist, Collision mitigation system and now transmission system. forward facing camera is cause of issue

The vehicle unexpectedly shifts into Park while driving. Each time this occurs, I have to turn off the car, use the “Push to Start” feature to restart it, and then shift back into Drive. This issue has happened multiple times, creating a safety concern while on the road.

The power tailgate system on my Honda Odyssey failed. The dashboard displays a “Power Tailgate Problem” warning message and the tailgate will not open automatically using the key fob, interior button, or rear handle. When attempting to open it electronically, the vehicle beeps but the tailgate does not move. The tailgate can only be opened manually. The vehicle and tailgate system are available for inspection upon request. The failure creates a safety risk because the tailgate cannot be opened electronically in situations where quick access to the rear cargo area may be needed. Additionally, if the power tailgate system fails unexpectedly, it could malfunction while opening or closing, potentially striking someone or failing during loading/unloading. The inability to rely on the automatic tailgate also creates hazards when carrying items or supervising children around the rear of the vehicle. The problem occurs consistently every time the power tailgate button is pressed. The system beeps but does not open. The issue has not yet been formally inspected by a dealer but can be easily reproduced. The vehicle has not yet been inspected by the manufacturer, police, or insurance representatives for this issue. A “Power Tailgate Problem” warning message appeared on the dashboard when attempting to use the power tailgate. At the same time, the vehicle emits a beep but the tailgate does not move. The issue began recently and has occurred every time the power tailgate has been used since the warning first

I hit a pothole and my airbags deployed. The Right side airbags and the front passenger seat airbags were deployed.

The front windshield camera completely failed. No longer have emergency braking. Honda said known problem and want to charge $2000 to fix

The contact owns a 2020 Honda Odyssey. The contact stated while driving approximately 50 MPH, the driver’s side curtain air bag deployed without impact. No vehicle occupants were injured from the unintended deployment. The manufacturer was notified of the failure and a case was filed. The vehicle was not diagnosed or repaired. The failure mileage was approximately 60,000.

The multipurpose camera unit failed causing the Forward Collision Warning, Automatic Braking, Lane Keeping Assistance, and Lane Departure warnings lights to come on and rendering all those systems inoperable. Part of the selling point of this vehicle is these additional safety features and for them to fail within 5 years of owning the vehicle is a safety concern. From my own research online, it seems this is a common problem for Odysseys built around this timeframe. This part is extremely expensive and is a required repair if you want the original safety features for the vehicle. I made the repairs, but the life of these units is something that should be looked into.

System is starting to fail by alerting me to clean windshield. Windshield and camera have been cleaned, still getting multiple warnings that system is shutting off safety features during my commutes.

I stopped at a red light and then my car just stopped. It seemed the car wasn’t able to start up the engine from the idle mode. I had to restart the car at the intersection with a truck behind me and with 3 kids under the age of [XXX] on the car with me. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Tailgate control module damaged by water leaking from faulty rear body seam seals on left top of vehicle Doors would lock and unlock on their own while driving and tailgate signaled it was open but never unlatched Manual tailgate opening/closing did not work at all Constantly beeped when unlocked and alarm went off randomly All electrical activity drained battery and made vehicle undriveable; tow was necessary First sign was "power tailgate problem" light on dash 5 days before vehicle battery was dead Honda charged for and replaced Tailgate control module and recommended an outside company to repair leak issues; outside company confirmed issue and noted repairs for same issue on similar models

After a heavy rainstorm, the power tailgate motor stopped opening or closing the tailgate.

Receiving ACC, lane keep assist, front collision , auto high beam errors on the instrument screen. None of the safety features work. Cruise control does not work.

The sliding door will not open, either manually or automatically. This is a huge safety problem since my children cannot get in or out of the vehicle quickly in an emergency. What should I do if this happens on both doors, I will not be able to open either sliding door.

Multiple Honda Sensing safety systems (collision mitigation, lane keeping, road departure, adaptive cruise, and auto high‑beam) disabled suddenly on 2020 Honda Odyssey EX‑L around 76,000 mi. Dealer and two independent diagnostics confirmed DTC U3000‑49, internal electronic failure of the forward recognition camera. The fault disables all automatic braking and lane‑keeping functions. Battery voltage and calibration verified OK; component failure is internal. Honda quoted ~$2,000 repair. This is a significant safety risk since all advertised crash‑avoidance functions stop working.

Multiple warning lights, all for the safety system: ACC, automatic emergency braking, etc. I am told by the dealer that this is due to a faulty forward camera. Looking at the NHTSA site and other forums, this is a VERY common issue and should be addressed.

I am submitting this complaint to report a serious safety defect involving my Honda Odyssey equipped with Honda Sensing technology. During normal operation and without any accident, impact, windshield damage, repair, or environmental event, all Honda Sensing safety systems suddenly and simultaneously stopped working. The disabled systems include Collision Mitigation Braking System, Adaptive Cruise Control, Lane Keeping Assist, Road Departure Mitigation, Forward Collision Warning, and related camera- and radar-based features. Multiple warning messages appeared, and the vehicle effectively lost all advanced driver-assistance and collision-avoidance capabilities at once. This occurred without warning and without any action on my part. This failure is extremely concerning because Honda Sensing features are marketed and relied upon as critical active safety systems intended to help prevent or mitigate crashes. A sudden, total loss of these systems materially reduces vehicle safety and places occupants and other road users at increased risk. A safety system that can fail entirely and unexpectedly—absent any triggering event—indicates a potential systemic defect, not routine maintenance or wear. I am concerned this issue may affect other Honda vehicles equipped with Honda Sensing and may be related to a common failure in cameras, radar units, software, or vehicle electronics. I respectfully request that NHTSA review and log this complaint, investigate this failure pattern, and determine whether a defect investigation, service bulletin, or recall is warranted in the interest of public safety. Vehicle details: Make: Honda Model: Odyssey Model Year: 2020 Mileage: 87000 VIN: [XXX] Thank you for your attention to this serious safety matter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Went to pull into parking lot, ADAS system starting going crazy. Throws transmission malfunction error. Headlights won’t work - they turn on and off or go extremely dim. Van keeps jerking and losing power. Code reader showed U3000-49 electronic failure. Van drove normal, no issues until this code popped up. Issue started 01/08/2026.

After purchasing my 2020 Honda Odyssey EX-L in July 2025 (had approximately 58,000 miles), in January 2026 (current mileage approximately 66,000 miles), it suddenly displayed multiple indicators on the dash, including 'ACC', 'LKAS', 'Brake System', 'Auto High Beam Problem', and 'Collision Mitigation'. My local mechanic indicated the cause was the collision radar system, but it needed to be calibrated at a Honda dealership. My local Honda dealership indicated the problem code as 'U3000-49 Internal Camera Malfunction', necessitating that the multi-purpose camera be replaced. The total repair cost was $2,104.99. Online research shows that this is a common issue with this model year. If the cause is due to a camera malfunction or disrepair, and it impacts the safety of myself and others in the vehicle, why is this not considered a valid reason for a recall? I shouldn't be responsible for a costly repair that didn't result from any mechanical issue or mistreatment on my part. Because of the safety implications, this should be a Honda recall, and I should be reimbursed for the repair cost.

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 front-facing camera stopped working, and all associated ADAS systems no longer functioned (Adaptive Cruise Control, Automatic Emergency Braking, Forward Collision Warning, Lane Departure Warning, Lane Keeping Assistance). Several errors needed to be cleared every time the vehicle was started. Our Honda dealership determined that it was a failed Multipurpose Camera (code U3000-49), and that the entire camera unit needed to be replaced and re-calibrated.

The airbag deployed unexpectedly while driving without a collision. The vehicle became unsafe to operate, and I sustained an injury. This happened last night so nothing has been inspected yet.

Upon starting the vehicle, it failed to engage in reverse. Although the backup camera activated, the vehicle remained stationary. After multiple ignition cycles, the vehicle eventually engaged in reverse and then moved forward in Drive. However, shortly after, the vehicle experienced a sudden loss of power and entered "limp mode," restricting speed to approximately 15–20 mph regardless of throttle input. The engine revved excessively high without corresponding acceleration, and a severe burning/heat smell emanated from the transmission/engine compartment. This failure occurred without any prior warning; notably, no dashboard warning lights or "Check Engine" indicators illuminated to alert the driver of a mechanical or electronic fault. The sudden, un-signaled drop in speed on a public roadway created a significant safety hazard for following traffic and risked a rear-end collision. The vehicle was towed to a certified Honda dealership where the Transmission Control Module (TCM) was diagnosed as failed. The TCM is currently being replaced under the Honda Certified Pre-Owned (CPO) warranty. We do not know what else requires replacement and repairs. The dealership will not cover the replacement of the transmission fluid, or engine fluid, despite the fluid being subjected to extreme heat and potential damage during the failure and subsequent limp mode.

This is now the second time that we are having a rear hatch failure. with about 37,000 miles on this van, the control module shorted out due to water getting into it due to a bad seam (according to other Odyssey owners who are suing Honda for this). We could not get the hatch to open or close, so I paid the dealer to fix it. Honda did give us a check after the fact to cover some of the bill. Now, with less than 51,000 miles, it has happened again. The hatch will not open or close. In the event of an emergency, this is a major safety issue, to be potentially stuck inside the cabin. The hatch started going up and down randomly, and we could not control it. Now, it won't go up or down. This van is is a mess. Not only does it have this issues, but the rear back up camera still does not work, even though it was recalled...they would not honor their recall, and the brakes occasionally come on without cause, when going around a corner and there is oncoming traffic. It thinks that we are headed for a collision, and it's another safety problem here in the northeast. Honda needs to own up to their quality problems relative to these three safety issues.

My Multi-Purpose Camera System has gone bad after only 5 years. Collision mitigation, cruise control, brake system, lane keep assist, among other safety features are failing because of this.

The multipurpose camera module has failed, on the vehicle resulting in the simultaneous loss of several driver-assistance and safety systems while the vehicle is in operation. These systems include cruise control, lane keep assist, lane departure warning, collision mitigation, automatic high beams, and the brake system warning. Upon inspection, there appears to be overheating within the camera module. This overheating has caused visible discoloration both inside and outside the module housing. Based on these observations, I believe the condition may present a potential fire hazard. Additionally, the plastic cover mounted to the windshield becomes extremely hot to the touch, creating a risk of skin burns if it is accidentally contacted. This malfunction poses a significant safety concern for my family. If the camera fails while driving, the vehicle’s safety systems may not function as intended, increasing the risk of an accident. All of the failures chime in one after another displaying a problem with the malfunctioning components stated earlier in the text. Furthermore, if a driver is deaf or not actively monitoring the instrument panel or speedometer, they may not hear or immediately notice the warning alerts indicating that these systems are no longer functioning. The issue has been diagnosed by my local repair shop finding error code U3000-49: Camera/Radar Internal Failure. Repair requires replacement of the multipurpose camera module, with an estimated cost exceeding $2,000 in parts and labor, which represents a significant financial burden.

The tailgate control module has been water damaged and needed to be replaced twice. My local Honda dealership was unable to correct the issue and stated that it is due to a water leak in the frame of the vehicle/tailgate. The dealership has identified the tailgate control module as the cause of the electrical issues causing the battery to die, and advanced safety features to malfunction. Warning lights came on for break system problem, lane departure mitigation system problem, and many other systems all caused by the tailgate control module being water damaged from a leak in the frame.

Dash has warning light showing "Power Tailgate Problem", and power tailgate will not function. The next day there was heavy rain, and the dash had a flickering warning showing the tailgate was open. This also caused the interior lights to flicker on and off as the tailgate open warning was flickering on and off. I returned the van to my home for fear that the tailgate would open automatically while driving down the road. I had the tailgate control module replaced on February 27, 2025 for this same issue, which was due to a tailgate seal leaking water onto the tailgate control module that shorted the module. This is now the second time within less than one year this same module has shorted out. This is a known issue with a class action lawsuit already filed against Honda that should result in a recall. The potential danger of the tailgate opening while driving makes this minivan not usable to transport my kids for fear of their safety.

In December, out of the blue suddenly had rotating list of warning on dash panel (Lane Keeping Assist problem, Collision mitigation system, departure mitigation system problem, auto high-beam problem, Adaptive cruise control problem) plus Brake Warning system light is on constantly and brake hold not working. At first this was intermittent but now on constantly when starting and driving car. Only 55k miles on my Odyssey. Dealer said he had 3 of these in the last three months. Said it was Multi Purpose front camera failure. Cost over $1500. Since huge safety issue putting not only my family but other cars/people at risk, we are paying to repair, however we just found hundreds of people complaining about this same issue. This should be a Honda Recall. We did nothing wrong to cause this safety issue and this part should NOT fail in 5 years. I don't have the final invoice yet but I can upload later if required

The auto slide door latch will not disengage. The rear passenger door cannot be opened electronically OR manually.

2020 Honda Odyssey EX LKAS, Collision Avoidance, Auto High Beam etc. warning lights to cycle continuously. Had my Honda mechanic check problem and Camera Monocular, forward facing camera causing issues and requires replacement. This is only a 5 year old vehicle with 60,000 miles on it! Honda and many used auto parts want upwards of $850 for camera and then as much as $1500 to replace. This is a serious safety issue. None of this vehicles Safety assist items work without this camera.

Car would randomly die while I was driving, causing my children and I to be in severe danger in the middle of a busy road multiple times

After researching I find it to be a sensor in the windshield is a common problem

My wife started hearing a knocking sound while driving, coming from under the hood. I opened the hood while the engine was idling and could tell the sound was coming from inside the engine. Checked the oil level and it was in the operating range and looked clean. I had just changed the oil and filter 08/2025. After that we immediately drove it to the Honda dealer where we purchased the vehicle and the service manager heard the noise, checked for recalls, but could only find the recall for the 2019 Honda Odyssey [XXX] The service manager called in one of his mechanics to listen to the noise in the service manager bay and he said, "Sounds like a bad rod bearing". They then took the vehicle to inspect it further in the mechanic's garage, but as they were pulling it into the bay the engine complete seized up. The vehicle only has 68k miles on it, but now its beyond the warranty period. I was also told by the dealer when I purchased it, that it and the 2019 are identical, so why was the recall issued for the 2019 Odyssey, but not the 2020 model? I'm reading lots of similar reports of this same exact issue with the 2020 model from Honda forums and on youtube posts. This engine problem is clearly larger than the initial recall that was issued in 2024. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The Multipurpose Camera Unit has failed resulting in loss of Adaptive cruise control, lane keep assist, Automatic braking and other features related to the MCU. There are approximately 6 warnings when starting the car of features not working, and 3 lights that remain lit on the dash including "Brake System". This is the second time this issue has arise. The first time was replaced by the dealer under warranty.

Driver side rear sliding door will not open even when the automatic release button is disengaged. Some could be trapped in an emergency or I am worried that if it opens I will not be able to get it closed.

Connecting rod bearing failure at 105,000 miles, even with full recommended and documented service history.