2018 Honda Odyssey: headlights failing or too dim

Filed Oct 15, 2026 · Driver assistance, Electrical · VA

I own a 2018 Honda Odyssey Touring. On May 29, 2026, I started the engine on my Odyssey and several dashboard system warnings appeared. The internet suggested having the battery tested and it was getting low, so I replaced the battery. The warning signs remained and caused several Honda Sensing safety and driver-assistance systems to become unavailable, including Adaptive Cruise Control (ACC), Lane Keeping Assist System (LKAS), Collision Mitigation Braking System (CMBS), Road Departure Mitigation, and Auto High Beams. Additionally, a Brake System warning appears on the dashboard. I have video recording of these warnings from when they first appeared in May. On September 2, 2026, the lights disappeared out of nowhere and all components worked. Later that same date, the lights were back and the components stopped working again. This happened again on October 13, 2026 - lights went off, then returned later in the day. The recurrent temporary reprieve from the lights makes me wonder if there is an electrical short in the rearview camera that controls those safety features. The diagnostics cost of this alone was going to be nearly $200. As numerous other similar complaints have been made to the federal safety agency, I am hoping this issue will be investigated and addressed - it is concerning that a single system failure is causing multiple safety features to be disabled - notwithstanding that is is difficult to know when to be worried about warning lights when the dashboard is full of them.

Filed Oct 13, 2026 · Driver assistance · MD

there is a very common issue with Hondas that the front camera behind the rear view mirror shuts down which causes many safety systems to shut down and nit work this happened to my car it is very unsafe as i am now missing five very important safety features and i am going to have to pay thousands to repair it. This problem has been confirmed by my mechanic as he inspected it. This happened randomly out of nowhere with no signs of this coming. The five components that do not work because of this camera failure are lane assist, auto high beam, lane departure, adaptive cruise control, and collision warning. This puts me and others at danger.

Filed Oct 8, 2026 · Driver assistance · GA

The front camera that controls lane keep assist, adaptive cruise control, collision warning, auto high beam, lane departure failed so none of these features work. The component has been replaced by a Honda service center. I don’t believe the failed component is available to inspect.

Filed Oct 7, 2026 · Driver assistance · PA

Camera/Radar behind the rearview mirror failed. This triggered the following alerts to populate. Forward collision alert, auto high beams, lane departure, active cruise control (active and passive both failed to work), brake system, transmission system, lane keep assist failure. The gear indicator would flash when the transmission system error came on. Van has ~76k miles on it. ~$119 for diagnosis, ~$1400 for the part, ~$300 for the calibration and several additional hundred in labor. This is a known issue with the 5th generation Honda Odysseys. Honda won't do anything about it. It was up to 8 error messages on the dash at one point.

Filed Oct 1, 2026 · Driver assistance · NJ

-multiple messages/lights on dashboard determined by dealer to be due to forward looking camera, which disables Hondas Sensing safety suite. Available for inspection upon request. -safety of myself/family and others put at risk due to distracting messages/lights on dashboard, which can also conceal additional issues not associated with forward camera. Safety features are disabled when the camera does not work properly, specifically lane assist, adaptive cruise control, collision mitigation , road departure mitigation, auto high beams. -problem has been confirmed by dealer: DTC U3000-49 -yes, inspected by manufacturer/dealership -issue appeared randomly approximately a month ago with no other warning signs

Filed Aug 21, 2026 · Brakes, Driver assistance · OR

My Odyssey randomly began displaying all of the ADAS warning messages: The Brake System indicator light comes on, Forward Collision Warning, Lane Departure Warning, Lane-Keeping Assist, Auto High Beam System error, etc. These came on beginning 7/25/26 and have come on everyday since causing the entire ADAS system to be inoperable. There have been a few days that they didn't come on immediately. I have had a few days where they came on half-way through my drive. This is a safety issue due to a defect in either the front camera or wiring to it, a nuisance, and something Honda needs to correct. It seems to be way too common of an issue according to my research. There hasn't been any damage to the van and no reason for these to come on. I have done research and see this has happened to many people. The replacement camera is costly as well as the calibration. Therefore, I haven't taken it to the dealership but I have discussed the issue with them. They agree that the camera is getting too hot and failing, which is causing the errors and of course all of those safety features fail simultaneously.

Filed Jul 28, 2026 · Brakes, Driver assistance · IL

On 7/28/26, my 2018 Honda Odyssey began displaying the following warning lights and system messages on the dash: •Adaptive Cruise Control (ACC) system error •Lane Keeping Assist System (LKAS) error •Auto High Beam system error •Collision Mitigation Braking System / forward collision error These errors were present before I replaced the 12V battery. I had the battery tested at that time and it failed a load test, so I replaced it, expecting the ADAS-related errors to resolve. After the battery replacement, the original errors remained, and additional warning lights appeared, including a transmission system problem indicator and a brake system warning light. I disconnected the negative battery terminal for approximately 10 minutes in an attempt to reset the modules, then reconnected it. After reconnection and a period of idling, further warning lights appeared that had not been present immediately after the battery swap. I have not been in a collision, and there was no impact to the windshield, front bumper, or brake components at any point during this period. The vehicle’s brake pedal feel has remained normal. Because these errors were present before the battery was replaced, the battery does not appear to be the root cause, and the underlying issue affecting the ACC, LKAS, auto high beam, and collision mitigation systems remains unresolved. I have seen reports from other Honda owners describing similar cascading ADAS and system warning lights on comparable Honda models.

Filed Jul 7, 2026 · Driver assistance, Electrical · TX

There are multiple systems that have failed in the vehicle: — Lane Keeping Assist Problem — Collision Mitigation System Problem — Auto High Beam Problem — Adaptive Cruise Control System — Road Departure Mitigation System Problem Here’s the issue, I’ve seen multiple people with this issue saying it’s related to the camera system. I’ve reported it multiple times and to the dealer and have not received a straight answer. This needs to be investigated. How many complaints do you need to receive about safety issues in a make/model to do something about it/

Filed Mar 26, 2026 · Driver assistance · FL

our honda odyssey 2018 elite - has a failed windshield monocular camera - original part (36160 - THR - A73) failure is a u3000-49 error. This failure causes most of the advanced safety features of the vehicle to not be operational. see these dashboard errors: Collision Mitigation System Problem Road Departure Mitigation System Problem Auto High Beam Problem Adaptive Cruise Control Problem Current repair cost from a dealership can exceed $2000. I've researched many forums and this seems to be a very common problem among Honda Odysseys of similar year range. I fee like Honda should issue a recall and replacement for owners since this involves many of the saftey features of the vehicle and cost is very prohibitive to fix for many of us.

Filed Feb 1, 2026 · Driver assistance · IN

Front camera is known to go out on these vans causing ACC, LKAS, Collision mitigation, road departure mitigation system, auto high beam, transmission problems and more.

Filed Oct 8, 2025 · Driver assistance · CA

t approximately 105 000 miles, while driving my 2018 Honda Odyssey, multiple advanced driver assistance systems (ADAS) malfunctioned simultaneously. The following warning lights and messages appeared on the dashboard: LKAS (Lane Keeping Assist System) ACC (Adaptive Cruise Control) Auto High-Beam Headlights Collision Mitigation Braking System, Road Departure Mitigation This occurred without any prior symptoms, and the systems have remained nonfunctional since the initial incident. I did not observe any physical damage, sensor obstruction, or weather-related cause at the time. The car was in regular use and had not recently undergone service or modification. Safety Concern: These systems are critical to safe vehicle operation — especially at highway speeds — and are part of the vehicle’s integrated safety design. Their sudden failure without clear cause presents a serious safety concern for the driver, passengers, and others on the road. Troubleshooting / Diagnosis So Far: Battery is original and may be aging, but the issue persisted after a jumpstart. No recent accidents or damage. Online research shows that many other 2018–2020 Odyssey owners have reported similar simultaneous system failures, which may indicate a pattern or a design flaw. Request for Action: I respectfully request the following: That Honda investigate this incident and advise if it is part of a known issue or Technical Service Bulletin (TSB). If applicable, provide warranty or goodwill coverage for diagnosis and repair. Consider this complaint as part of broader data regarding a potential system-wide electrical/software defect.

Filed Oct 2, 2025 · Driver assistance, Electrical · TX

Mass safety system failure due to front projector camera/ wiring harness. noted systems below failed: Adaptive cruise control Auto emergency braking Forward collision warning Lane departure warning Lane keeping assistance Auto High beams All above system are not operational