Three times during the first 1500 miles the collision mitigation braking system has failed, disabling that feature and adaptive cruise control, displaying a large diagnostic on the electronic dashboard and telling me to see my dealer. In all cases I was driving in normal traffic on northern California freeways at cruising speed (twice on 101, once on 80). The first two failures occurred during daytime, the third at night. The weather in all cases was normal (no rain, snow, mud, ...).when I visited the dealer after the first two occurrences (when the car is turned off and then back on the condition clears) the dealer found no diagnostic codes or other problems. Then the problem occurred a third time. The dealer and Honda corporate say they have no idea how to fix it because of the absence of diagnostic codes.

- Berkeley, CA, USA

The braking system hesitates and grabs. It is like there are several stages or steps in the brake. It is almost impossible to stop smoothly. As you press the brake pedal in, the car doesn't slow normally until you hit a "step" or "notch" and then it just slows down rapidly and you go forward in your seat. This problem began as the vehicle had around 400 miles on it. The vehicle did not have the problem when I took it off the lot the first time, and other new Accord I have driven do not have the problem.

- Alpine, UT, USA

I am experiencing brake pedal issues. As I put pressure on to slow down, at any speed, it feels like the brake pedal gets "stuck", then it grabs hard and lurches you forward in your seat. As I relieve my foot off and put pressure back on, it does the same thing: The pedal seems to go down in "stages". I cannot brake in a normal, smooth fashion. I have taken the car to the dealer that I bought it from twice in 2 weeks and they have stated both times that none of their staff can duplicate the problem and it has not been resolved as of 3/7/18. The problem was first documented with around 200 miles on the car.

- Fairview Heights, IL, USA

I purchased brand new my 2018 Honda Accord sport Dec 28 2017 I have 1450 miles currently on the car and the brake pressure has been lost. When applying breaks at highway speed its not as noticeable but around town at 45mph when applying the breaks there is dead space then full brake kicks in which makes others think you are brake checking them. When going to the forums and to this website I saw other complaining about the brake booster failures. I went to the dealership. They advised yes the vehicle has a failed brake booster and is on a national back order. I am currently driving my new car with a failed booster waiting on Honda to fix it. I hope this is safe that that my brand new car isn't being damaged waiting for this part.

- Hampton, VA, USA

The contact owns a 2018 Honda Accord. While driving approximately 10 mph, the contact depressed the brake pedal and the brake collision mitigation braking system warning indicator illuminated. The vehicle failed to accelerate. The contact coasted the vehicle into a parking lot, turned off the vehicle, restarted it, and was able to drive normally. However, the failure recurred twice. The vehicle was taken to chapman Honda of tucson (4426 E 22nd St, tucson, AZ 85711), but the failure was unable to be diagnosed. The vehicle was not repaired. The manufacturer was notified of the failure and provided case number: 06589496. The approximate failure mileage was 1,000.

- Tucson, AZ, USA

Vehicle exhibited electronic brake booster failure after less than 100 miles of driving. The brake pedal has a hard "step" in it, and grabs very suddenly once the step is overcome. This makes smooth braking, especially when coming to a stop, nearly impossible. The suggested fix is to replace the electronic brake booster (01469-tva-A24). The new brake booster should return the brake pedal to normal, and restore a smooth linear brake. This is a known safety issue with the 2018 Accord as the part (01469-tva-A24) is on national backorder. This should be a recall and my vehicle will spend over 2 weeks in the shop!!!

- Greenville, SC, USA

Brakes grabbing and almost uncontrollable. At low speeds, touch brakes lightly and they do little to stop the car. Depress brakes harder and the pedal 'steps' in and the brakes grab abruptly. Very difficult to brake smoothly / non-abruptly. As a result, at least one time ABS kicked in prematurely when road surface covered with snow. But core problem (grabby brakes) are irrespective of road surface.

- Cherry Hill, NJ, USA

With 30 miles on my new 2018 Honda Accord 1.5L touring the brake alarm activated and the brake pedal became extremely hard to press. It was dangerous and I didn't know if I could stop the car. The dealer replaced the electric brake booster to fix the problem. There are many owners on the internet reporting the same problem.

- Summerdale, AL, USA

Bought vehicle Nov 22,2017. The following week when commuting home from work a light came on while using driver assist showing collision mitigation system problem. See your dealer. We took it to the dealer and reported the problem. The shop foreman said to take a photo if this happens again. The following week it happened again in the commute home while using driver assist showing the same message. I took the car back to the dealer the 2nd time and they kept it a few days so the foreman could replicate the issue. He couldn't replicate it and told us to take it back and take a photo and record if it happens again. He also thought our commuter transponder might be interfering with the Honda computer technology. The 3rd time on the commute home was a scary situation when not only the light came back on, the brakes engaged at approx. 55 mph and we thought someone rear ended us in the fast lane on the freeway. Thankful no one hit us or us hitting them. Took the car back to the dealer over 2 weeks ago and and they are trying to replicate it once again. Now the car is not safe to drive due to the fact the brakes angaged on the freeway at 55 mph. We refuse to drive it. The dealer called us to drive it because they installed a recording device when it happens again. This didn't make sense to us to subject anyone to a possible accident. We understand they are trying to replicate it but someone could be hurt or killed. We are in limbo and are very disappointed.

- Chino, CA, USA