Automatic Emergency Braking Problems of Honda Accord - part 1

Vehicle: 2017 Honda Accord ex mileage at incident: approx 30,000 date of incident: Dec 10, 2025 description of problem: while my daughter was driving our 2017 Honda Accord ex, the collision mitigation braking system (cmbs) suddenly activated without warning. The car slammed on the brakes even though there was no obstacle in front of her. This caused the vehicle to skid, but fortunately there was no collision or injury. There were no diagnostic codes found when inspected by an independent auto shop. The shop advised us to temporarily disable the cmbs system. This appears to be part of the ongoing issue of phantom braking in Honda vehicles, which has been reported by many owners and is currently under NHTSA investigation. I am concerned about the safety risk, especially since my daughter drives this car regularly. Safety concern: unexpected braking at highway or city speeds could easily cause a rear-end collision or loss of control. I request that NHTSA investigate this incident and ensure Honda provides a permanent fix or recall.

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Inadvertent automatic emergency braking collision mitigation braking system automatically activated even there is no obstruction while driving.

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The contact owns a 2020 Honda Accord. The contact stated that while driving at an undisclosed speed, the brakes independently activated, and the transmission independently shifted into neutral. The contact stated that there were no other vehicles nearby. The brake warning light illuminated. The dealer was made aware of the failure. The contact was advised to clean off the sensors and see if the failure reoccurred. The contact stated that she did not want to see if the failure would recur. The contact was informed that the repair was not covered under the recall. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 59,660.

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On December 4 at 8:57pm I was driving on interstate 295 doing 60 miles an hour and my car’s warning light for breaking came up for me to break like something was in front of me even though there wasn’t, this is a continuing thing going on. I reported every time it happens.

While driving, my 2023 Honda Accord hybrid suddenly experienced a multi-system failure affecting: road departure mitigation system tire pressure monitoring system (tpms) vehicle stability assist (vsa) hill start assist electric power steering system brake system (“brake performance may be reduced”) all warnings appeared within seconds. The vehicle is available for inspection, and the incident is documented with multiple photographs. In addition to the system failures, the vehicle unexpectedly began to lose power while I was driving, causing it to slow down rapidly in active traffic. This created an extremely hazardous situation, including: risk of being rear-ended since my vehicle slowed without warning reduced steering assist reduced braking performance loss of stability control inability to accelerate out of the way this combination could easily have caused a serious collision. I later learned that there is an active recall related to the systems that failed on my vehicle. However: I never received any communication from Honda, no letter, no email, no notice of any kind. I am extremely unhappy and frustrated about this. Had Honda informed me of the recall: I would have scheduled service immediately I would not have driven the car under normal conditions I would not have been exposed to this dangerous situation on the road the absence of recall notification directly contributed to my being put in a potentially life-threatening situation. A recall notification exists for a reason which is to prevent exactly the type of failure and danger that I experienced. Honda’s failure to notify me removed my ability to take preventative action. The issue has not yet been diagnosed or confirmed by a Honda dealer. I will be taking the vehicle in for inspection as soon as possible. No inspections have been conducted yet, but I have full photographic documentation from the moment the incident occurred. No prior warning lights, symptoms, or error messages occurred.

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While I was driving on the highway, the brakes of my car suddenly were violently activated and I had not touched the brakes. If there had been a car behind me, it would have been a major rear end collision. It was over quickly and I accelerated back to the normal speed. I talked to the Honda service mgr where I purchased the car and he said he was unaware of the problem although I see that that nearly 3 million Hondas have experienced this issue.

The contact owns a 2020 Honda Accord. The contact stated that while driving at various speeds, the automatic emergency braking system erroneously activated, causing the vehicle to abruptly stop in the middle of the road. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure, and the vehicle was not repaired. The contact stated that the failure had occurred on several occasions. The manufacturer was not contacted. The contact was informed of NHTSA action number: ea24002 (forward collision avoidance); and related the failure to NHTSA action number. The failure mileage was unknown. The VIN was not available.

Honda never contacted me about this recall or steps to fixing the problem to make sure my car was safe and running/working correctly. I would like the problem/recall to be fixed ASAP. I looked up my VIN on your website and this is how I even found out about this recall. Please help me get it fixed. Thank you.

I purchased this used vehicle. I have never received any recall information on this vehicle. The electric power steering system, tire pressure and the vehicle stability assist indicators lit up after a successful vehicle inspection was conducted Thursday 11132025. A 2023 recall, identified by the NHTSA as 23v-430, covers the issue and requires dealerships to replace the vsa modulator. I contacted the dealership and they told me they could not assist.

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Driving on a clear road on a clear day with no car in front of me, the brake warning flashed and then the car braked on its own. There was no reason for the warning or for the car to brake on its own. Automatic breaking isn’t even a feature on this car.

Vehicle will sometimes automatically emergency brake with nothing in front of it.

See all problems of the 2018 Honda Accord 🔎.

I was driving northbound in on i15 in salt lake city when a home depot bucket blew into my lane. I slowed down to change lanes when the collision mitigation braking system (cmbs) deployed without warning, bringing my car to an almost stop causing a semi tractor trailer to hit me from behind.

See all problems of the 2021 Honda Accord 🔎.

Car won't crank lights on dash on. Keep saying abs braking system.

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All vehicle assistance lights on such as e-break, vsa, mitigation system, and cruise control show up as faulty. Infotainment system goes off on its own as well. Very bad electrical parking break light always shows up when vehicle starts. Taking it to dealer multiple times they claimed it’s ok.

I was traveling on a two lane road at approximately 40 mph when the automatic braking engaged for no reason, bringing the car to almost a complete stop. There were no other cars from either direction.

The vehicle keeps braking automatically with nothing in front of me, I see numerous people reporting it so I figured I should aswell, nothing in front or near me when it automatically brakes, it is scary as heck tho!.

I was driving down us route 42 on 10/4/25 at 1:10 am and my car phantom break itself while I was doing 60 miles an hour on the highway.

Good morning, I have new Honda Accord 2020 which always been taken care of regular services and oil changes etc. This morning I tried to start my car going to work but suddenly all brake related warning signs came off. My card still not starting the engine. I researched online and found out many people who have same Honda facing same issues. So I figured it's better to be reported before someone gets really hurts while on road. Please find attached pictured with this incident report please.

Wednesday 10/01/25 I was driving to work on the highway with cruise control on, it was a empty road with nothing in front or behind me, my steering wheel got yanked out of my hands and turned all the way to the right towards the guard rail, then the steering wheel got yanked all the way to the left automatically, I did a 180 degree spin and crash my 2019 Honda Accord touring 2. 0l. I believe the lane keeping assist system (lkas) was at fault as well as the collision mitigation braking system (cmbs). The vehicle got towed off the highway directly to a local body shop. The vehicle is available for inspection upon request. Mine and others safety was put at risk because the vehicle decided to crash itself potentially killing me or other people. The vehicle just arrived at the body shop and no diagnosis has been done yet. The vehicle is not drivable so the problem has not been reproduced. Vehicle has not been inspected and looked into yet, I am waiting for the body man to do a deep dive into it or I am planning on bringing it back to the dealership. There was no warning lamps present.

What component or system failed or malfunctioned, and is it available for inspection upon request? the vehicle’s collision avoidance automatic braking system is malfunctioning. It engages unexpectedly while the vehicle is moving with normal traffic flow. The system is still installed and fully available for inspection upon request. How was your safety or the safety of others put at risk? the automatic braking system activates suddenly and without cause while I am driving at typical speeds (approximately 40–60 mph) with the flow of traffic. This unexpected braking creates a serious risk of rear-end collisions, both endangering me and putting other drivers at risk of crashing into my vehicle from behind. Has the problem been reproduced or confirmed by a dealer or independent service center? I have reported the issue to the dealer, but they have been unable to replicate the problem during their inspections. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? no, the vehicle and its braking system have not yet been inspected by the manufacturer, law enforcement, insurance representatives, or any other third parties. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? no warning lights, messages, or other indicators were present before the issue occurred. I purchased the vehicle last month, and the problem with the collision avoidance braking system has been present consistently since then.

Left a store on a frontage rd, drove about 1/2 mile , car just breaking out of no where, stoped in the middle of the road, the dash stated breaking malfunction see dealer immidentaly car died, I restatred it , the dash still stated the same , the picture of the car had back lights flashing and the red break sign was on , took it to the nearest dealer and when they started it the warning system had erased. They inspected it, told me that they could not find anything wrong. I just leased it 2wks ago and only have driven it 3 times , not even a hundred miles and this happens. There were no warning signs of any kind . If I would have been approaching the freeway I could have been killed.

Driving along at approximately 41 mph, cmbs unexpectedly activated for no apparent reason. There was no object in road to potentially collide with. Warning system barely activated before cmbs engaged braking very hard. Vehicle went from 41 mph to 31 mph in 2 seconds as recorded on dash cam. This is the 2nd occurrence in the same approximate location, both for no apparent reason & with no object in road ahead. Had an another car been following closely, this would have caused injury.

On September 2, 2025 at 1004-1005 est, my car phantom braked, when there was nothing in front of me and this time instead of just flashing brake on the dashboard, it actually breaks itself and threw me into the steering wheel thank god my seatbelt caught me, but it really choked me up. This has happened quite a number of times before, but this is the first time that it breaked when I actually stepped on the brake pedal it break itself myself also. The component is the automatic breaking for the collision impact that keeps phantom breaking on me. It has never been looked at by a dealer or anyone otherwise. The lamp that came on was the break lamp where the rpm are at.

While driving my car suddenly felt like it was braking. The car beeped but no brake light appeared as when it thinks I am going to run into something. There were 2 incidents with nothing in front of me. One was at a low rate if speed and one was on a freeway. The car went back to normal after a second. The incidents were around 3 weeks apart.

There has been multiple times that when I am driving on the highway doing 60 miles an hour, the dashboard will light up to brake the car when there is nothing in front of the car, no other car no trash nothing. It has done this on slower roads where the speed limit is 40 mph and under but it will actually brake the car and I have had cars behind me when this happens. This keeps happening multiply times a week.

Unknown. I will be driving and automatically it will lock the brakes and nobody will be in front of me. I tried turning it off but somehow it still ends up on. This has been doing it now for some but it’s getting worse and worse. Before it would just blink on the dash “ brake” but wouldn’t apply the brakes but recently it has been applying the brakes and going from 45mph to 60mph it has done it and giving bad whiplash. Now it’s starting to scare me because someone is going to end up rear - ending me and cause an accident. I tried talking to a dealership about it but they said they will look into it and never hear anything about it. I really am starting to be worried everytime I drive my car that something bad is going to happen. This needs to be fixed and diagnosed.

My car be braking and nothing be in front of me. It detects something in front of me when nothing be there.

The contact owns a 2025 Honda Accord. The contact stated that while driving at any high speeds, the collision mitigation braking system (cmbs) engages independently. In addition, all 4 tires lock, and the emergency brake engages. A dealer was contacted. No warning light illuminated; however a warning message to "brake" would illuminate, but did not give the contact ample time to engage the brake pedal manually. The contact mentioned she sustained whiplash due to the failure. The contact also mentioned that the failure occurred on three different occasions. During the most recent failure, the contact mentioned driving at 40 mph, when the cmbs engaged independently. The vehicle was taken to the dealer, where it was diagnosed; however the diagnosis was unknown. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 211,000.

On August 7, 2025, the automatic braking system alerted with the sign break and then proceeded to stop the car when there was no object or vehicle in front of me. This would have been extremely dangerous. If there was someone behind me this is not the first time this has occurred it has happened several times.

The collision mitigation braking system (cmbs), which is part of Honda's advanced safety features, slammed on the brakes driving down the road at about 40 mph. When the vehicle slammed the brakes, me and the passenger were jerked forward with seatbelts on. Had a vehicle been behind us traveling it would have slammed into the back of my vehicle causing an accident. I will be contacting the dealer to address this problem as it just happened yesterday 8/3/2025. Although I did read that this complaint is currently under investigation. When the vehile slammed on the breaks, the brake warning light came on right after the brake was slammed and immediately went off.

The Honda collision mitigation braking system (cmbs) will randomly activate without any obstacles in front of the vehicle. Consequently, increasing the risk for car accidents, loss of control, and bodily harm. The car has not been inspected by a dealer or certified mechanic for this problem. However, the vehicle is available for inspection and repair as needed. While the incident occurs, the cmbs warning system will flash ‘brake’.

I am reporting two safety-related issues with my 2022 Honda Accord hybrid. 1. Head gasket failure at approximately 93,500 miles, the head gasket failed without any prior warning signs. The vehicle had been regularly maintained at Honda dealerships, with one service done by a third-party mechanic around 87,000 miles. There were no engine warning lights or coolant leak warnings before the incident. The engine temperature warning suddenly appeared while driving, and I immediately stopped the car. A Honda dealership confirmed the head gasket failure and quoted over $4,000 for repairs. This kind of major engine failure is highly unusual for such a new vehicle and raises serious concerns about long-term engine durability or possible design flaws in the cooling system or head gasket components. 2. False activation of automatic emergency braking (aeb) the vehicle’s automatic emergency braking system frequently activates or issues a warning while driving, even when there are no obstacles or vehicles nearby. This has happened multiple times and creates a sudden sense of panic, increasing the risk of being rear-ended or losing control of the vehicle. Both issues suggest potential safety defects in this model. I respectfully request that the national highway traffic safety administration investigate whether similar complaints have been reported for the 2022 Honda Accord hybrid, as these failures could pose significant safety risks.

When driving my car it will phantom break when there is nothing in front of it going down the highway 5060 miles an hour and it’s done at numerous times. I have not been in an accident yet, but it’s something that keeps occurring on my car.

To whom it may concern, I am writing to formally report a serious safety issue involving the automatic emergency braking (aeb) system on my Honda Accord 2020. The system has been engaging randomly and without cause, abruptly applying the brakes when there is no obstacle or hazard present. On multiple occasions, this malfunction has occurred while driving at normal speeds, including on highways and in moderate traffic. These sudden, unprovoked braking events have created extremely dangerous situations, nearly causing rear-end collisions and putting both myself and other drivers at risk. Despite there being no obstruction in front of the vehicle, the system behaves as though an emergency stop is necessary. This issue not only undermines the purpose of the safety feature but also significantly increases the risk of an accident due to unexpected deceleration. I urge Honda to thoroughly investigate this issue, as it appears to be a potentially widespread and dangerous defect. I am requesting that the company: •address and correct the fault in my vehicle’s aeb system at no cost •provide a clear explanation of the root cause •inform me of any recalls or technical service bulletins (tsbs) related to this problem.

Parking brake suddenly engaged while in traffic car would not move. Car had to be towed brake pads were replaced but mechanic stated parking brake had defect that only the dealer can repair.