Purchased new 2018 Honda Accord sport from dealership. While driving the vehicle it will brake with no warning and anything in sight. We see to experience this issue almost on a weekly basis. The vehicle is currently at the dealership for the 3rd time since March. Of course they say they can't replicate the issue and until can't do anything about it. The service manager continually try's to refer us to the owner's manual and stands firm that this is part of the brake mitigation safety system and is "normal". I have personally been driving the vehicle on the highway at roughly 70mph on a clear day with no vehicles in sight, no road construction, straight highway, not merging on or off the road and the system lock down with three children in the backseat. Most recently my girlfriend was driving the vehicle and the brake system locked down causing a gentlemen to swerve off the road to avoid hitting her in the rear end. I'm sick of hearing excuses from Honda and the dealership! this is not a safety feature, this is a very dangerous issue. I have been told by the service manger the system can be cut off but I should not have to cut off a "safety" feature on a brand new car with less than 40K miles. I have seen hundreds of complaints on line regarding this issue and I certainly hope it doesn't take someone being killed before Honda corrects this issue. I have documented six occurrences of the braking system locking down just in the past month. I have also spoke with Honda certified techs & service writers whom have all stated they're aware of the issue and no fix is currently available. If so I suggest Honda purchase this 2018 Honda Accord back!

- Forest City, NC, USA

My vehicle was in motion at 35 mph with no traffic ahead of me and one vehicle to the driver-side rear. With no obstructions in the road or traffic ahead of my vehicle for at least a half mile, the emergency braking system activated flashing a "brake" warning light on the dashboard and locked the brakes causing my vehicle to come to a quick and complete stop in live traffic. Attempts to override the system by applying pressure to the accelerator pedal failed to correct the problem. I estimate that it took between two to three seconds before the system disengaged and I was able to accelerate again to operating speed, narrowly avoiding a collision.

- Neenah, WI, USA

Three times now I have had the emergency breaks activate for no reason. No one was injured the first time as the vehicle was moving very slow. The second time this happened though, I was injured. I was driving approx. 45 mph down a busy street when the car stopped without warning and for no apparent reason. I was nearly rear-ended. Not only did this scare me, but I was in extreme pain afterwards. When the pain got worse and I developed bruising on my neck I went to see a specialist and he confirmed that I have whiplash. When I spoke to the mechanic at the dealership I was told that the sensor is just sensitive. They checked it out but offered no solution. I have kept the feature turned off since this happened. The third time it happened with the feature disabled. My son was in the car with me. We were both shaken up pretty badly. I am now scared to drive this car. Every time the dash lights up for any reason, I flinch. I have had to miss work due to the injuries that I received. I am a single mom to five kids, I cannot afford to miss work due to poor design and engineering of this vehicle. I bought this car thinking that this feature was a safety feature. It has certainly proven to be the opposite!

- Simpsonville, SC, USA

I purchased a new 2018 Honda Accord sport June of 2018. I have had my car into Honda more than 7 times for the same issue with the brake mitigation system. The car brakes on its own with no reason. Honda said it could be an air freshener hanging on the rear view mirror, bugs, rain, snow, and even a shadow from a bridge. They say every time I have brought it in that no errors come up in the system so they reset the computer and say it is operating as the vehicle is designed to. I have been in a 75mph or more zone on multiple occasions and the car will brake down to 40 or less in an instant. It sends everything in my vehicle flying. Honda denied a Honda buy back because they did a system update for the brake mitigation system that has not been released to the public yet. They are clearly aware of the issue and how dangerous it is but they expect me to continue to drive it. I am too scared to drive this vehicle with the possibility of injuring myself or someone else. Please remove these vehicles from the roads!

- Papillion, NE, USA

Collision mitigation braking system problem which causes the adapted cruise control to deactivate itself all of a sudden when driving in high or low speed traffic, happens on highway or regular street, all kinds of weather conditions from rain to sunshine. Very scary especially while going on I-95 in high traffic that is all moving very fast. Has happened at least a dozen if not more times and the dealership could not find a resolution. Taking it again next Wednesday 5/15/19.

- Merritt Island, FL, USA

When driving my car and I applying the brakes, the initial bite of the brakes fells like the car is not stopping as it should after applying the brake pedal further then it stats stopping very hard it almost feels like if I'm brake checking the person behind me, almost got in to a couple of collisions because of it and also almost have gotten rear end it because of it.

- Bronx, NY, USA

On 2018 Honda Accord the adaptive cruise control which is standards on all trim levels, does not brake the vehicle to maintain the set speed when going downhill. This is odd since the vehicle will apply brakes to maintain speed if there's a vehicle in front of the car, but on downhills all it will do is make several downshifts to try and maintain the speed. Every other car I've driven that has adaptive cruise control will apply brakes to keep the vehicle speed from increasing in an uncontrolled manner. Of course if you tap the brakes yourself cruise control is disabled. A simple software update would resolve this issue.

- Raleigh, NC, USA

On multiple occasions, while driving on the highway, my 2018 Accord has unexpectedly braked when there was no object/car in front of me. When there is car stopped in front of me, the sensors do not kick in for emergency assisted braking. Something is definitely not right with this car.

- Atlanta, GA, USA

I've had the car for 4 months, and the car has come to a stop three times on a busy state route at rush hour, and once on a street when the road expanded from one lane to two. I am now turning the cmbs off every time I get in the car. However, the braking system still engaged! I must cross over a solid white line to access the freeway, and I'm scared that the car will stop there every day. One day was bright and sunny out, one day was dark before sunrise, one day was cloudy and overcast. In all cases, the road was straight and dry.

- Roswell, GA, USA

Car has a safety sensor system called cmbs (collision mitigation braking system) that is supposed to help you avoid collisions. On 2 occasions this braking system has engaged for no apparent reason causing the car to brake abruptly in traffic creating extreme accident potential.

- Yorkville, NY, USA

I purchased my cars about 4 months ago and noticed some issues as soon as I left the dealership. First there's no mileage digital speedometer, only kilometer. As soon as you switch to miles it disappears. Second, the car play system often times resets itself while in driving mode, also happens a lot when gear is shifted. Third, lane sensor system is completely defected as well and cannot be trusted for a second, the worst is the car pool lane, in California is a yellow lane and the car automatically pulls towards it. It obviously cannot detect yellow lines. Today something new happened and completely changed the game for me : the car emergency breaks were activated by nothing and out of nowhere while I was driving on 90 mph !!!!!!! all my stuff were thrown from the back seat to the front and I got seriously injured by the seat-belt that was pushed against me! let me make it clear...there were zero cars before me or around me ! thank god for no cars behind me or this citation could have ended differently. I drove the car to the dealership and left the keys over there till they figure it our or give me a different car. I'm scared to go back driving it.

- Los Angeles, CA, USA

On 2 separate occasions my car's automatic collision mitigation system has engaged without notice and any reason. There was nothing in front of my car and the car braked suddenly while I was driving 45 mph. The last time this happened I was thrown forward and back with a jerk. Since then I've been experiencing lower neck and shoulder pain. I disengaged the collision mitigation system and will take the car into the dealership for diagnosis.

- Plantation, FL, USA

I engaged acc, that controls cruise control and frontal collision, mitigation system, in normal traffic. While travelling at a speed of 60 miles per hour, following another car the spacing was controlled by acc. The car in front of me continued forward, my braking system engaged and caused me to go from 60 mph to about 35 mph. The vehicle to my rear had to take an evasive maneuver to avoid an accident. I saw no road debris. I pulled over to check the radar unit and the camera system. No issues observed. During this trip the acc went offline 3 times down to SC and twice it failed driving back home. Each time I was in traffic and caused issues as the system was trying to manage my speed in traffic.

- Omaha, NE, USA

Electronic braking system error popped up, which suggested taking the car to a dealership. The car was parked for 2 days and the engine would not start with this error.

- San Mateo, CA, USA

I have experienced a failure in the aac system almost resulting in a front collision. I was on the interstate the other afternoon with aac and lkas engaged on my 2018 accordt touring with 18000 miles it was 89F I was in traffic but cruising at a steady 65 mph when the traffic in front of me started to slow. It was at this moment that the dashboard threw the error message "collision mitigation braking system error. Please see your dealer." Luckily was able to apply brakes almost has a crash went home and the next morning error was gone did again when I driving few weeks later and recently on February 15th 2019 I almost had another crash because of the same issue went to the dealer they hold the car for 1 and half week can't find any issue and got car back on March 8th after driving 5-6 miles got same problem turn off the car and turned on again after driving another 7-8 miles same problem called the dealer they want me to bring the car back when the message still appearing on the screen other way they telling to take risk of crashing car before they can help me called Honda customer service got same response

- Helotes, TX, USA

I was driving on the freeway when the traffic came to a sudden stop and my emergency collision mitigation braking kicked in. I proceeded to press the brakes myself and the computer automatically locked the brakes and would not release for nearly seven seconds. I was completely stopped on the freeway and almost rear-ended due to the brakes not releasing. I pressed the gas several times and press the brakes to try to release it but nothing worked until the brakes eventually released themselves about 7 seconds later.

- Los Gatos, CA, USA

Cmbs problem... was driving on the highway yesterday when the "collision mitigation breaking system" light came on and that disabled the acc I was using. Nothing particular happened, maybe I was braking at the time. I arrived at destination. Turn the car off and back again right away to see the warning light disappear and everything back to normal. I thought I was ok but it happened few hours later on the way back in the same circumstances.

- South Richmond Hill, NY, USA

Today was the second time that my car applied brake by itself when I was driving 65 mph on the freeway and there was no cars in front of me. To mention that my 2018 Honda Accord has the automatic brake system but I got use to how it works its nice, but sometimes it applies brake for no reason and its scary because this system disconnect the gas padel when applied and its scary and unsafe when it is acting weird and applying brake when its not necessary ( VIN:(xxxx) ). thank you parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- El Cajon, CA, USA

After my "brake system" light came on and the dealership denied it even though I had record of it, my car decided to see how fast it could hit the brakes. I was driving on the us-60 in phoenix, Arizona with adaptive cruise control on, traveling at 65 mph during morning rush hour, so it's still dark, on a 6 lane freeway. I can see brake lights far ahead, so I lightly tap my brakes to disengage acc and slightly slow the car down. The car had other plans and the brakes completely locked up like it was using the emergency braking for collision mitigation' but no warning/info showed on the dashboard as it normally does when emergency systems engage. So basically my car decided it wanted to slam on its brakes in the middle of a busy freeway, near bumper to bumper traffic, all because I lightly touched the brakes-- it was not abrupt, it was not a hard push... it was literally to turn off acc. I watched the rear view mirror as the SUV behind me was about to put my trunk in the engine compartment, but thankfully they were able to swerve into the hov lane next to us. They barely missed me and if that open spot was not there for them, I'd likely be seriously injured or dead. Honda has ignored my messages and it's time to let our government know this car has issues.

- Gilbert, AZ, USA

On 2/14/19, I was driving on a city street in a straight line at approximately 40mph. The car ahead of me stopped. I stepped on the brake and instantly the dashboard warnings lit up - adaptive cruise control, collision mitigation braking system, road departure mitigation system, and the brake - and the brake did not work so I could not stop. I rear-ended the car in front of me doing significant damage to the front of my car. The warnings were still visible after the crash and I took pictures of the dashboard as best as possible. The warnings say something about system not working and to see a dealer. The same warnings appeared on 2/13/19 in the afternoon but disappeared on 2/14/19 in the morning. Other warnings of safety systems not active have appeared due to ice/slush but then cleared when the sensors were cleared, but these new warnings are different. At least twice, maybe three times in the past few months, the car would suddenly brake and slow down with nothing in the road or in front of the car. My bluetooth connectivity worked fine for first 2-3 months but then stopped and I couldn't reconnect the phone over the past two months. It seems like more than one system/electronics problem and seems like the warnings appeared at the same time as the brake not working as if it was more than an alert but a system (systems) no longer functioning at all. The brake worked after the accident when the car was restarted.

- Canton, MI, USA