Automatic Emergency Braking Problems of Honda Odyssey - part 2

Vehicle applied brakes for no reason. Lost ability to see reverse camera during backing up. Half of the instrument cluster went dim to become barely visible. Radio screen freezes randomly. Engine cuts out or shudders intermittently.

See all problems of the 2021 Honda Odyssey 🔎.

1. Vehicle information year / make / model: 2018 Honda Odyssey touring mileage at time of incident: approximately 123,952 miles purchased new or used: used 2. Incident summary on June?13,?2025 upon starting the vehicle for the first time that day (vehicle is garage kept, year round, at home when not in use), problem codes for the auto high beam, adaptive cruise control (acc), lane keeping assist system (lkas), collision mitigation braking system (cmbs), and road departure mitigation (rdm) showed on the display and all features failed to function. 3. Detailed description of failure & safety risk (chronological) component/system affected: I have not taken the vehicle to the local Honda dealership as yet as I plan to schedule an appointment during the week of 17 August. After researching this issues it is found that many other consumers have experienced the same issue and confirmed that it was the adas front-facing camera and radar sensor failure. Due to the failure this causes the following safety systems to cease functionality: auto high beam, acc, lkas, cmbs, and rdm. Vehicle is available for inspection upon request. Safety risk: all affected systems are critical for maintaining lane position, speed, collision avoidance, and visibility. Not having these critical safety features creates a heightened risk of collision or unsafe maneuver. Inspection: only an authorized Honda dealer will inspect/diagnose the issue. There has been no inspection from the vehicle manufacturer, law enforcement, insurance, or independent service.

See all problems of the 2018 Honda Odyssey 🔎.

While driving approximately 40 mph, the vehicles emergency avoidance system activated and applied the brakes very heavily. We were nearly hit by a vehicle behind us, which nearly caused multiple accidents. There was nothing in front of us, and the road was CO. Pletely clear in front of us.

See all problems of the 2025 Honda Odyssey 🔎.

My Honda's multipurpose camera system has failed without warning or apparent cause. Upon starting my vehicle, I now receive multiple alert lights indicating simultaneous failures in critical safety systems including: adaptive cruise control (acc) lane keeping assist system (lkas) collision mitigation system road departure mitigation system auto high beam functionality occasionally, all the system failure alerts go away. According to my local Honda dealership, this represents an "internal failure" of the multipurpose camera unit (code u300-49). The dealership wants >$2,000 to fix the issue that appears to be a widespread known problem. There was no warning before the complete system shutdown, and all safety features connected to this camera are now non-functional.

See all problems of the 2020 Honda Odyssey 🔎.

My car unexpectedly did a phantom brake at high 60+ mph with no car in front of me. I was so nervous due to car behind me almost colliding into me.

See all problems of the 2022 Honda Odyssey 🔎.

The multipurpose camera has an internal failure at 105 thousand miles. This controls the automatic emergency braking, lane keep assist, adaptive cruise control, lane departure warning, and more. This safety features such as emergency braking, lane keep assist, and lane departure warning are important safety features. All of these features help drivers avoid collisions by acting to correct or avoid collisions or accidents faster or earlier than drivers can react. The Honda dealership service department has confirmed that the multipurpose camera had an internal failure, but did not provide a reason and there was no inciting incident during driving or ownership that caused this. The Honda dealership service department has been inspected and diagnosed that the multipurpose camera had an internal failure. No, there were no warning lamps, messages, or other symptoms of the problem prior to the failure. They only appeared after the failure, and the failure happened without warning. The failure first appeared on July 7th, 2025.

See all problems of the 2019 Honda Odyssey 🔎.

My car have never in an any accident but my distance radar sensor not working. And it’s very risky to drive under this condition and it’s very big safety for me and my life so help me to fix this issue.

The multipurpose camera failed bring down all driver assistance functionality including lane keep assist, emergency brake, auto high beam, parking sensors, cruise control, etc. Fix is outrageously high $2500+. Internet search finds this to be a very common issue and deserves a recall.

The automatic emergency braking and forward collision warning will occasionally go off when there are no vehicles or obstructions in the way. It will often cause the vehicle to brake and make the driver act to keep the vehicle in lane or from another vehicle from rear ending you.

This is regarding the collision mitigation braking system (cmbs) I will be driving on side streets around town (driving kids to school and daycare) and there will be no vehicle/obstacle near me/ in front of me and my van will flash on the dashboard "brake" and then it slams on the brake. This has happened at least 5-6 times as of todays date 5/20/25. There is no warning or reason for the car to brake like this. I have brought this to the Honda dealer two times now once I realized how serious this was. I was informed that since it isn't throwing a code there is nothing they can do. This is a serious safety risk not only to myself but to my children- this is a van so most people who drive this have small children. The last two incidents I was inches from being rear ended with my children in the car. The time before that I had my family from out of town in my car, that could have been eight people seriously injured or killed for no reason.

See all problems of the 2023 Honda Odyssey 🔎.

Without any notable prior messages or symptoms prior to the failure, on [xxx] after dropping off the kids at school and then turning on my 2019 Honda Odyssey ex-l (28,170 miles), the "brake system" light was on and the following 5 dashboard warning lights/messages turned 1) adaptive cruise control problem, 2) lane keeping assist problem, 3) collision mitigation system problem, 4) road departure mitigation system problem, 5) auto high-beam problem. The advanced driver assistance systems no longer works, and it becomes unknown to the driver whether the "brake system" light is being triggered only by the collision mitigation system problem, or an additional problemch as the anti-lock brake system not working. While no accidents occurred, the warning lights add unneeded driver anxiety, which can contribute to a potential safety impact. The problem has been confirmed by the san leandro, CA Honda dealer to be error code u3000-49. Dealer diagnosed problem as "multipurpose camera / millimeter wave radar internal circuit failure" and recommended to replace the multipurpose camera and perform aiming. Dealer advised that safety features will not work. The diagnostic fee was $179. 10, and the repair fee was quoted as $2456. 55 the vehicle or component has not been inspected by the manufacturer, police, insurance representatives or others. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Vehicle make/model/year: 2022 Honda Odyssey date of incident: 5-1-25 mileage at incident: 30,000 summary of incident: while my 2022 Honda Odyssey was fully stopped in traffic with my foot firmly on the brake pedal, the vehicle unexpectedly lurched forward and struck the car in front of me. Just before or during the lurch, the brake system warning light appeared on the dashboard. I did not have my foot on the accelerator at any time. The road was flat and weather conditions were normal. The idle stop system has not been functioning for several months, so the vehicle was operating in normal engine-on mode. Despite this, the car surged forward from a full stop, indicating a possible failure in the brake system, electronic throttle control, or a software/ecu malfunction. This was a dangerous, uncommanded movement of the vehicle while stopped, which resulted in a minor collision. Thankfully, no one was injured, but this poses a serious safety hazard, especially if it were to occur in crosswalks or at intersections. I will report the issue to Honda the dealership and requested a full diagnostic inspection. I am submitting this complaint because this incident could have caused serious injury or worse and may be part of a broader defect affecting brake or throttle systems on this model.

Front facing camera went out on a 2020 model. Several warning lights appear related to lane assist, front collision warnings, and automatic emergency braking. These safety features are important, and Honda should issue a recall. The camera is around $800 to replace, plus another $800-$1000 to install and calibrate. Car is only 5 years old, and there have been other camera/electrical related problems, and many recalls. Please hold Honda accountable to fix their declining reliability issues.

The vehicle automatically brakes when approaching a small bridge crossing that had a slight 2 inch lip from pavement to bridge concrete , it also tries to alert of a collision when going around a slight curve when a vehicle is passing .

I was driving my vehicle and accelerating. My vehicle suddenly braked with no warning while I was driving. I hit my left side of my head as I was not expecting this to happen. I was nearly rear-ended/nearly caused a multi car accident. It was incredibly scary to have the cmbs go off for absolutely no reason. There was no car ahead of me or other reason for it to happen.

See all problems of the 2024 Honda Odyssey 🔎.

Bcm software is out of date or not programmed correctly, car turns off while driving. When park and off and the keys are away, car tries to turn on by itself. Power lost while driving.

Multiple warnings regarding adaptive cruise control, lane keep assist, and lane departure warning problems. Honda says it is the front multi-camera. The vehicle works fine intermittently, but doesn’t more often than not. Issue started to occur shortly after a wiring harness recall.

It started that all the sensor in our car started to go off. We were told we had a bad battery, even thought we had replaced it new just last year. Once we had the battery checked and alternator. The sensors started to act up again, out tail gate started to malfunction. Wouldn’t automatically close. A few weeks ago driving down the road the tail gate opened and the anti theft system started going off while the car was running and still going. Come to find out there is a water leak in the rear that has gotten into the rear fuse box and has cause substantial corrosion. The latch to the tail gate is broken. Honda is telling us our extended warranty doesn’t cover any of this, even though it is common knowledge, that the water leak is a known problem from 2018-2021. We just found out a few days ago.

The windshield monocular camera is completely non functional causing several dashboard errors to appear. It very disheartening as this is such a known issue within the Honda Odyssey community and very expensive to replace and get calibrated after replacement. This should be recalled since so many are having this issue. Clearly this is a fault of Honda. It seems that the camera can get too hot being in the windshield and just doesn't work. A big reason why I wanted this vehicle was because of these sensors. Now I can't use them.

Front facing camera malfunctioning, and it is available for inspection upon request. This malfunction causing 5 different warning lights to show up on dashboard. Including 1. ) auto high beam problem, lane keeping assist problem, collision mitigation system problem, adaptive cruise control problem, road departure mitigation problem. The issue has been confirmed by the dealer. There were no warning lights prior to the random malfunction. I have not had wind shield replaced (which I have read could mean a calibration of the camera issue), nor has there been any accidents taken place. My safety is at risk as I am unable to use these features while driving unless the front camera is replaced.

The front camera that controls adaptive system died within 4years of owning the vehicle so all the warning lights come on now.

When starting my van, I got warnings for acc, lane departure, and collision mitigation stating that the issues were broken. I received error code u3000-49 at the Honda repair dealer which stated the multipurpose camera no longer works. In doing my research, it appears this is a known issue that Honda is not taking responsibility for and charging $1,500 to $2,000 to repair. They state the car works fine other than having none of those safety features working.

It first started with the power tailgate failure which I brought it to Honda who are aware that there is a faulty sealant that is causing water to get into these Odysseys. They refuse to fix the issues and they are very costly. My van has never been in an accident. Now I'm getting all sorts of warnings from the adas system. Honda has refused to fix their issues and I can not afford $7000 cost to get this cleared up. People who own these vans are complaining and no one is doing enough to get this recalled.

The multifunction forward looking camera in the top of the windshield developed an "internal fault" and either needs replacement or these safety features will fail to work. These safety features allow me to avoid accidents. The problem has been confirmed by the dealer. There are warning lamps that state that these features are no longer working.

__ the present complaint alleges as follows: 1. Honda has a defective design in the advanced driver assistance systems (adas) of all Honda Odysseys, models 2018-2023. 2. Namely, Honda has placed the radar behind the large Honda emblem on the front grille. This causes the radar to give a "radar obstructed" warning, which disables all advanced driver assistance systems in the car (automatic emergency braking, adaptive cruise control, forward collision warning). 3. The "radar obstructed" warning cannot be reset by restarting the vehicle or disconnecting the battery, requiring recalibration of the radar at the cost of $800 each time since it takes several hours to do (per dealership). 4. The official Honda Odyssey forum online has countless complaints on the same issue without resolution by Honda. 5. Honda has acted in bad-faith towards their customers since this defect impacts the vehicle's advanced safety features for which buyers incur additional expenses, endangering the lives of passengers. 6. Honda has acted in bad-faith towards their customers by designing a system that requires continuous and substantial expenditures without resolution because it is an engineering problem, I. E. , the placement of the radar behind the large, thick plastic h emblem obstructs the radar. 7. I hereby ask that the NHTSA investigate this issue and order Honda to offer a solution in the form of a recall that permanently addresses the problem.

Radar structed ,blind spot off,brake system light on.

Vehicle start up diagnostics show multiple failures, including abs, e-steering, emergency braking, adaptive speed control. Dealership found a problem with the right rear abs sensor. The sensor wire harness was severed. The harness showed damage in multiple places (see photos). Besides being severed, it showed another deep cut and a place where the outer plastic sheath was cut away. The loss of abs sensor made the vehicle exhibit poor handling including braking. The vehicle has only 4000 miles and is in pristine condition with no damage.

I took my van to the dealer and they told me that the sensor inside of the front mirror is faulty, causing the following lights to continue to cycle if the car is adaptive cruise control problem (acc); auto high-beam problem (a); road departure mitigation system problem; collision mitigation system problem; lane keeping assist problem (lkas); brake system lights. I am unable to engage or disengage any of these systems, including when I am driving. This seems to be a major security hazard and I am aware of others that have experienced this with this exact year, make and model (across different packages) of Honda minivan. I just wanted to report this in case this becomes a major concern for other consumers.

At speed less than 25 mph, the collision mitigation braking system (cmbs) did not work. At cross roads this cmbs will not work when a vehicle comes from the side. This will work only if it detects the vehicle's presence in front for more than 3-5 seconds. Will not activate during sudden presence of vehicle at any speed.

Adaptive cruise control, blind spot monitoring, lane keep assist, automatic braking, auto beam functions stopped working.

After I took my car through a car wash I got the folllowing alert, "radar obstructed warning. " after this warning I then got the warnings for brake system, cruise control all not working.

Multipurpose camera failure. Warnings appeared upon failure after being parked in the shade on a moderately warm day ~80 degrees. Warnings with chimes reappear after being cleared, causing distraction while driving. Safety systems are inoperable without expensive camera replacement. Systems disabled as a result include adaptive cruise control, collision mitigation system, lane keeping assist, road departure mitigation, auto high beam system.

The front camera has failed for apparently no reason at all. There has been no crash, no damage on our end. We turned the car on and all of the safety warnings came on. The dealership has inspected it and said the code is for the camera failing. Many warning lights appear on the dash due to none of the safety features working without the front camera. This has caused all of the adaptive safety features to fail. There have been no recalls yet, despite the recalls for the rear camera, and many other Odyssey owners having the same issue with the front camera. We have reported it to Honda and were told that it has been reported by others, but not enough times to issue a recall. It is expensive to fix and poses a serious danger to leave due to none of the safety features working. This is a manufacturing defect that Honda is not taking seriously.

Several warnings popped up on my dash at once: adaptive cruise control, lane keep assist, brake system, auto highbeam, collision mitigation system, and road departure mitigation system. The dealer’s internet is down for at least several days, so they are not able to troubleshoot the problem. However, an internet search to troubleshoot myself indicates that this is a standing, systemic issue with 2018 and 2019 Honda Odyssey’s that may warrant a recall.

For approximately 1 year the collision mitigation braking system will intermittently activate even when no hazards or objects are present in front of the vehicle. This has happened regardless of speed or any other conditions and has even happened while accelerating. There are no lights or warnings that present before the system activates. This poses a hazard of losing control of the vehicle or potential causing a crash due to the unexpected and sudden braking. This problem is intermittent and does not happen every time the car is driving but has happened enough to bring the car in to the service center. The first time we were told they couldn't replicate the problem so they wouldn't look into it. The second time they acknowledged a know issue with their collision mitigation system and recommended the camera and radar be recalibrated at a cost of $850. For some reason this failure of the system is not covered under warranty. They also stated the calibration is not guaranteed to fix the problem.