2021 Honda Accord brakes problems

Filed Oct 18, 2026 · Brakes, Electrical · FL

Vehicle: 2021 Honda Accord Sport Subject: Intermittent Electrical Malfunctions, Multiple Safety Warnings, and Loss of Acceleration I am reporting ongoing safety concerns involving my 2021 Honda Accord Sport. On multiple occasions, my vehicle has displayed several dashboard warnings, including brake system, electric parking brake, vehicle stability assist, hill-start assist, adaptive cruise control, and electric power steering warnings. These warnings have appeared intermittently in the past and sometimes disappeared on their own. On October 18, 2026, while traveling on the highway at approximately 65 mph, these warnings had already been displayed for approximately 30 minutes to an hour when my vehicle suddenly began struggling to accelerate. Despite pressing the accelerator, the vehicle continued losing speed, and the RPM gauge remained around 2,000 RPM. It felt as though something was holding the vehicle back. After several moments, the vehicle suddenly regained power, accelerated, and the RPM increased. This was particularly concerning because I was traveling at highway speed. I also experienced electrical problems with the interior lights. While the vehicle was running, neither the automatic interior lights nor the overhead lights near the rearview mirror would turn on. They remained inoperative after I turned off the vehicle. Later, the lights began working again, but I noticed the right overhead light fading while the left remained illuminated. The battery was replaced earlier this year, in 2026. I am concerned that these intermittent malfunctions could result in a sudden loss of power or failure of important vehicle safety systems while driving. I am requesting that these problems be documented and investigated for a potential safety defect or recall. I have photographs of the dashboard warnings available as supporting documentation.

Filed Aug 31, 2026 · Brakes, Electrical · WI

Dash lights on for Brake system malfunction. Emergency parking brake light on as well as TPS system. Lights around Park, Neutral and drive not illuminated. Battery and alternator are in good standing.

Filed Aug 27, 2026 · Brakes, Electrical · AL

All of my services lights are on in th dashboard.

Filed Aug 25, 2026 · Brakes, Electrical · CA

SUBJECT: A REQUEST FOR HONDA CORPORATE INVESTIGATION AND GOODWILL ASSISTANCE - 2021 HONDA ACCORD I am submitting a formal complaint regarding serious and recurring electrical and safety-related problems with my 2021 Honda Accord. 1. Numerous dashboard warning lights and safety-system warnings illuminate simultaneously. 2. The vehicle repeatedly displays messages instructing me to "See Dealer." 3. The power door locks repeatedly click and cycle as though they are attempting to lock or unlock on their own. 4. The stereo, on its own, scrolls through buttons and bluetooth blinking through all the stereo options on its own. 5.An OBD diagnostic code reader is unable to properly communicate with the vehicle and reports "Unable to Connect/Vehicle Not Found." 6. Sudden brake activated without any object being in front of the vehicle. 7. Factory Rims Extensive finish failure The simultaneous occurrence of these problems strongly suggest that this may involve an electrical, communication-network, body control module, wiring, power-supply, or other vehicle system defect rather than ordinary wear and tear. I am particularly concerned because the dashboard warnings involve vehicle systems that may affect braking, steering, stability control, driver-assistance features, and other safety functions. When numerous safety warnings illuminate at the same time, I have no reliable way of knowing which vehicle systems are actually functioning correctly. The repeated activation of the door-lock system is also concerning. The locks should not continuously activate on their own during normal vehicle operation. Combined with the diagnostic communication failure and multiple warning messages, this raises concern regarding a larger electrical or vehicle-network malfunction. Although the vehicle is currently outside the factory warranty period, this type of widespread electrical and safety malfunction should not reasonably occur in a 2021 vehicle as the result of normal use.

Filed Jul 7, 2026 · Brakes, Electrical · SC

Had to repleace the electrical parking brake sensor. Now all my lights on the dash board are lighted up and have to go get a diagnostic test done

Filed Mar 8, 2026 · Acceleration, Brakes · FL

This has been reported one time before but the situation has gotten worse when driving at approximately 60ish miles per hour but it starts doing it about between 50 and 70 mph when driving and the car is using the regular engine not the EV section. You will randomly lose the ability to accelerate and you have to remove your foot from the gas let the engine slow and then re-accelerate now for the second time as I'm driving I lose the ability to accelerate at all and no matter what I do the car will slow almost every warning light on the dash comes on and there are 11 different warnings I've uploaded photos of a few I have a video though also and you lose complete power and ability to drive warning lights such as power steering problem emissions problem powertrain problem all of those are part of what turns on if you try to move the vehicle it will not move unless it is an EV mode and even then it only works for several feet but you can't get over a few miles per hour if you are on the highway like I was going 65 mph and there's traffic is extremely dangerous the only reason I was not hit was because I turn my emergency lights on and was able to maneuver my vehicle to the shoulder safely had I been in a more busy section of the road or had I been in an area where I could not get off the road I would have been hit by another vehicle. Honda has stated they can't find anything wrong with the vehicle but a quick Google search shows that this is a common issue and I have a video of the dash with all the warning lights should anyone need it as well as photos.

Filed Mar 2, 2026 · Brakes, Driver assistance · FL

While driving the automatic brake system randomly starts flashing brake across the instrument panel and begins to brake the car. This does this while there are no other vehicles or any type of obstacles near the vehicle. It also, does it at random caution lights for the fire department on a 4 lane divided highway. There is no way to stop it from doing so. This happens frequently and leaves the driver with no control over the braking system.

Filed Dec 21, 2025 · Brakes, Driver assistance · VA

It makes false things there is no car but it brakes by self for nothing

Filed Oct 21, 2025 · Brakes, Driver assistance · UT · crash

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.

Filed Oct 19, 2025 · Brakes, Driver assistance · FL

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.