Automatic Emergency Braking Problems of Honda Odyssey - part 1

While changing lanes to an off-ramp the collision mitigation braking system suddenly activated along with a collision warning beep even though there were no automobiles nearby to trigger the warning. No cars in front of me and no cars to the right of me in the exit lane. My car immediately braked and tried to steer back into the main roadway, away from the exit lane. The lane departure light did also come on due to me not using a turn signal prior to the lane change, but there was nothing else around to trigger a proximity alert nor to respond to.

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.

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**vehicle:** 2019 Honda Odyssey **components affected:** forward collision avoidance, lane departure, adaptive cruise control, braking system, exterior lighting, electrical system, instrument cluster **complaint summary:** multiple safety systems on my 2019 Honda Odyssey have simultaneously failed, including lkas, acc, collision mitigation braking system, auto high-beam headlights, and other driver-assist features. The dashboard displays warnings for nearly every safety-related system, and the vehicle disables these features without warning. **detailed description of the problem:** whenever I start my vehicle, multiple error messages are displayed related to the lane keeping assist system (lkas), adaptive cruise control (acc), collision mitigation braking system (cmbs), road departure mitigation, auto headlights, and other safety features. These warnings appear together and persist even after restarting the vehicle. Apparently, this issue is widespread among 2018–2020 Honda Odyssey owners, with many reporting the same cluster of system failures. The problem appears to be related to a malfunction in the vehicle’s electrical system, sensors, or control modules. In my case, the failures occur without any external damage, weather event, or driver action that would explain the sudden loss of safety functionality. When these systems fail, the vehicle disables critical safety features such as automatic emergency braking, lane keeping, adaptive cruise control, and automatic headlights. This creates a significant safety risk, especially at highway speeds or in low?visibility conditions. **frequency:** the issue occurs whenever the vehicle is started, affecting my driving everyday.

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Since purchasing this vehicle brand new off the truck, we have had it back at the dealership multiple times ,we've taken it for the plug in console not working for firesticks, a sensor not working on the passenger side door and claiming it to be open, the sliding door not working correctly, the doors locking and refusing to unlock, battery draining, ac not working, stalling, dying at lights, slamming on its own brakes with nothing around, transmission acting weird, it putting itself in to sport mode, transmission sticking, doors not unlocking or not locking, sensors going off, random errors on dash, screens not working, car play not working, suspension popping, steering being wiggly and loose, brakes squeeling. Today we were told by the dealership "he saw the damage that is resulting in needing to replace the steering column. With that being said, it is considered a safety hazard to drive this vehicle with the condition the steering column is in. " this is after multiple times of saying nothing is wrong to we have to charge the battery to you need a new starter to this.

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The cmbs braking system is completely faulty. It regularly brakes for shadows on the ground, going up hills, or for no reason at all. There have been several near misses where cars behind me have almost rear ended me because of this cars erratic braking. I have a neck injury from this most recent episode of the car slamming the brakes for no reason.

We turned the car on and got an acc, lkas, fcs, ahl errors due to the front sensor and the camera failing. This is an issue that many Honda owners are dealing with. The issue will not allow you to use cruise control and will disable 90% of the safety features we bought this vehicle for. The car drives fine but the safety of those in the car is affected by this error and needs to be recalled due to the number of complaints of this issue. There were no errors or warning signs prior to this happening.

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The front camera that is responsible for adas suddenly died and it is very vurnerable to heat. The unit gets very hot and it gets hot quickly. The lifespan of the unit is very short and the dealer is asking for $2000 to replace it like they have seen this pretty often.

I reported issues regarding egress failure and children stuck within the back seat of the van, electronic dashboard failing while driving, and no start issues amongst others (11709419). Previously the certified dealer stated the issues just could not be reproduced, despite my videos, however, today they stated a Honda admin level director showed and told them the issues are being reported by others, they dont know how to fix it, and I need to come get my car, continue driving it.

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My 2023 Honda Odyssey elite has recurring, intermittent safety-related malfunctions across multiple systems. The most serious issues are: (1) door lock/unlock and rear door opening failures preventing emergency egress (children trapped), (2) intermittent “no-start/no-response” where push-button start does nothing (no click/no crank and sometimes no lights/electrical response), and (3) intermittent dashboard/instrument/electrical abnormalities while driving. I also previously experienced dangerous driver-assist behavior including unintended automatic braking and lane/steering behavior in construction zones. Door/egress: rear doors sometimes will not open from inside or outside even when the vehicle audibly indicates it unlocked. I have video of my children unable to exit the back seat. This is an emergency egress hazard. No-start/no-response: multiple events where the vehicle appears electrically dead and will not start, then after waiting ~10–30 minutes it starts without a jump. Stranding hazard. Recent examples: 12/31/2025 – doors would not open initially; after entry, no lights/electrical and start button produced zero response; after ~10–20 minutes it started. 01/05/2026 – while driving, dashboard/instrument display went off; buzzing noise believed hvac related occurred. 01/05/2026 – after parking at costco, vehicle again would not start (zero response); after ~30 minutes it started. 01/06/2026 – locking/unlocking malfunction again; rear doors would not open despite audible unlock (video). Repair history: authorized Honda dealer (bell road Honda) previously stated “cannot reproduce,” replaced dvd/recall items and performed a “reset,” but did not diagnose root cause; problems returned worse. Honda customer service case opened. Injuries: prior unintended automatic braking event (reported around 08/29/2023) caused injury (my legs hit dash; child had marks from car seat) and near rear-end collisions. Request: investigate potential safety defects.

Honda sensing stopped working and threw a bunch of errors about acc, lkas, collision mitigation, auto high beam error, forward collision, lane keep. Apparently the camera had an internal fault without any prior warning. Also vehicle’s timing belt tensioner already deemed leaking at just 75,000 miles, well below the 100k replacement point, despite regular checks and maintenance at Honda dealers. Front suspension leaking, Honda replaced only 1, and declined to replace both, as recommended by dealer mechanic. If I did not have Honda care, I would be left with a very large repair bill for critical components of the drivability and safety of the vehicle. This is not acceptable.

Suddenly one day in the morning taking my car from my garage, all alarms in my board turned on and stopped working: automatic emergency braking, blind spot warning, forward and collision warning, lane departure warning, lane keeping assistance and rear cross traffic warning. I bring my car to the mclarty Honda service in little rock, ar. After calibration showed that I need a new multipurpose camera code u 3000-49. This is major concern for me. My van is in perfect shape, only 7 years old not so many miles. Doing some research sounds like this is an issue with Honda vehicles. My neighborhood is full of kids ( I have 3 kids too)with these large vehicles you can find a lot of blinds spots and these features help to keep everybody safe. I believe this a safety issue that need to be recalled in Honda's cars.

All of the alarm lights are going on at once, immediately when the car is turned on. This includes the collision mitigation system problem, adaptive cruise control system, lane keeping assist system (lkas), break system. I am told by my local garage that it is a Odyssey radar system failure, that probably originates in the camera or computer, but that they cannot fix it or get parts for it. It is unclear if these systems work or not.

The windshield monocular camera failed, disabling all safety precautions.

All of the warning lights shows up on the dash board. Honda told me it’s related to a bad multi purpose camera. None of the safety features or cruise control will work until the camera is fixed.

Automatic emergency braking, forward collision warning, and lane departure warning systems stopped working simultaneously without warning. Upon further investigation, failure of the forward-facing camera is the likely root cause. Based on conversations in internet discussion forums [xxx] , [xxx] ), this is a common failure. There was a recall for the Odyssey to fix a wiring harness issue that could affect the back-up camera. I believe loss of the automatic emergency braking, forward collision warning, and lane departure warning systems is much more serious, with potentially catastrophic consequences. Since evidence suggests failure of the forward-facing camera happens frequently, I believe this issue should be treated with the same gravity as the back-up camera and a recall should be issued. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My van is braking when there are no cars or dangers in front of it. Sometimes there's a metal plate on the ground or speed bump when it brakes. Other times there's nothing in front. The car slams on the brakes and I cannot override it with the gas pedal. This puts my kids and I in danger of being rear-ended. This most commonly happens around 7:30am or 4pm when I'm taking kids to school or dropping off. I'm often in the carpool like or headed to the school when the car slams on the brakes. It's very frightening. The dealer cannot find an issue and cannot replicate the problem.

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I was at a 4 way stop on a quiet street, I stopped and then proceeded to move forward. As I was moving forward, in the middle of the intersection, the automatic emergency braking system activated which slammed on my brakes, involuntarily, in the middle of the intersection. There were no hazards in front of me that the vehicle would have detected as being a cause for braking. Thankfully, no one was coming through the intersection at the time from the perpendicular sides or else I would have been hit. The braking was so forceful that it caused my phone, that was sitting in my lap to be flung to the floor and was ripped from the charging cord with force. Additionally, to show the force, I had books sitting on the passenger seat that all got thrown to the floor with the impact of the braking system.

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Multi-purpose camera unit internal electronic failure. Front-facing camera mounted in the windshield. This caused several warning lights including the brake system warning light to illuminate. This failure caused the automatic brake system and other safety features in the car to turn off. The vehicle has been inspected by a mechanic. There were no other warning signs.

I was involved in an accident with with my family. Pregnant wife and daughter. I got into a front end collision and I was at fault. The forward collision warning didn’t activate, neither did the automatic emergency braking. This system has never failed on me and car has always stopped every time. .

My wife was driving our 2025 Honda Odyssey on [xxx] on a neighborhood road around [xxx]. She came to a stop sign and stopped to turn right. Upon accelerating to turn right, the emergency braking system activated slamming on the brakes and bringing the vehicle to an immediate stop. There were no other cars, pedestrians or other obstacles with any line of sight. The sudden stop caused her to whiplash hurting her shoulder. We brought the vehicle to joyce koons Honda of manassas. They downloaded the data and confirmed that the emergency braking system had activated but there were no reason codes given. They couldn't find any other issue and test drove the vehicle for 10 miles with no incident. My wife was really shaken up by the incident and refuses to drive the car until an actual cause is found and fixed. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Hello, my front collision camera is not working and I am getting all sorts of safety related error codes. I took it to Honda for an evaluation and they told me I would need to $1300 to fix part number 36160-thr-a74. As of now all the safety features have been disabled. These are the codes I am getting: adaptive cruise control automatic emergency braking blind spot warning forward collision warning lane departure warning lane keeping assistance.

On September 1, 2025 the front windshield camera on my 2018 Honda Odyssey failed, part #36160-thr-a03-m1, resulting in the loss of many of my vehicle’s safety features including: adaptive cruise control, emergency braking, forward collision warning, lane departure warning and lane keep assistance. The camera is available for inspection. Now when I start the vehicle it displays warnings that none of the above safety features are functional. I contacted 2 local Honda dealers, bellingham Honda and burlington Honda in washington state. Both dealers said they could not fix my car since the camera is not available, since it is not in stock and on national back order, with no date of when a new camera would be be available. I have also contacted 2 online Honda parts distributors and they also say the camera is in national back order and not available, with no date of when it would be available. The result is that my vehicle has most of it’s safety systems inoperable and it can not be repaired, since a new camera is not available, and Honda cannot provide me a date when the part is available and my vehicle can be fixed. I see on the internet the front camera failure is a common occurrence in 2018 Honda Odyssey’s and request NHTSA investigate make Honda recall these vehicles to fix the safety problem.

The automatic braking system beeped alert then applied brakes when I was going around a sharp curve, with cars behind me. Luckily they were far enough behind that they didn't hit me. This has been happening since I first got my Odyssey. I asked the Honda dealer about it if it was a defect and they said no that's how it work. I asked if I could turn it off permanently and they said no - I had to turn if off each time I turned on the car. Which I do most times but I forgot yesterday. I started turning it off regularly when it slammed on the brakes going around a curve some time ago bringing me to almost complete stop with car behind me. I probably should have reported earlier. I was in the car with a friend yesterday when it happened and she has a different model Honda and says it happens to her as well. I also am in a Odyssey facebook forum and someone with a 23 Odyssey is experiencing it - I thought perhaps it was my year and they'd work out the kinks but it does not appear so. I was willing to give Honda a little grace on these early safety systems, but this looks to be an ongoing problem which is unacceptable. I'm going to look into a dashcam to record these incicdents. I asked the dealer because surely they would be able to see a log of when they automatic braking engaged? if not, they should.

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.

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.

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.

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.

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.

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.

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.

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.