2021 HONDA ACCORD Complaints

Unable to use cruise control Unable to use lane control Unable to use tire pressure gauge Unable to use auto brake system Car shakes due to a sudden decrease in engine performance. Turbocharger issues Powertrain System issues ECM Failure

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.

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.

The contact owns a 2021 Honda Accord. The contact stated that while driving approximately 30 MPH, the message "Emission System Problem" was displayed. The vehicle was taken to the dealer, where it was diagnosed and determined that the turbocharger had failed and needed to be replaced. The contact was informed that the failure was a common issue. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 108,579.

My car currently has displayed all lights on panel. Went to auto zone to have codes read, shows powertrain-description is code PO299 suggests turbocharger assembly. Safety is put at risk because all of the safety features are now disabled.

Infotainment system recieving phantom / ghost touches. Screen selects menu items on its own, plays, pauses music, causes major distraction and disruption. Screen flashes when changing menus and can pull attention from the road. Safety issue!

40,000 miles and 5 years after original in service date - failure of 2021 ACCORD 1.5T headgasket system between cylinder s #1-2. Required full head disassembly, removal, rebuild of head, and replacement of head gasket and associated components. $6000 quote from Honda Corporate as I was 55 DAYS outside of warranty. Absolutely ridiculous for a 5 year old car with low miles.

Most recent incidents on Friday 08/07 car lost power while driving on freeway unable to accelerate, all engine/warning lights came on was thankfully able to pullover and shut off vehicle. This is not first incident this also happened about 5x in 2025 and had car inspected and serviced by Honda dealership each time being told they didn’t know what the issue is because the engine light wasn’t on at time of appointments. Final visit resulting in them adjusting the intake valves but they were even unsure if this was the correct “fix” well it did last a year without other incidents until recently, there seems to be a recall on 2023+ models but not my 2021 and this seems like may be similar issue. 12v battery and spark plugs are new, car is regularly maintenanced and have been told alternator is still good. Unsure where else to turn as I no longer feel safe driving this vehicle especially with my children. Where I live and work is almost impossible to avoid freeways.

My center screen has a ghost touch; I have brought it to my dealer since the day I bought it I have been having screen and CarPlay issues. never fixed always told its fake phone cable, even though my phone can be disconnected and the screen still goes crazy, either way I left it alone because I can't keep going to the dealer, today while I was backing up this ghost touch keep changing my camera angle and caused the screen to freeze completely, I would suggest looking into this as I found many people online with the same issue,

I own a 2021 Honda Accord Hybrid. Shortly after purchasing the vehicle as a used vehicle in 2023, I began experiencing intermittent air conditioning performance. The A/C would gradually lose cooling capacity over time until it was no longer able to cool the cabin effectively. To temporarily restore operation, I added refrigerant approximately twice per year, believing the system had developed a minor leak. As the condition worsened, I brought the vehicle to an authorized Honda dealership for diagnosis. The dealer diagnosed the vehicle with a leaking A/C condenser and a leaking heat exchanger pipe and recommended replacement of both components. Honda declined goodwill assistance because the vehicle is outside the original warranty period. I later learned that Honda previously issued an extended warranty for A/C condenser failures on 2018–2020 Accord models due to a known condenser defect. My vehicle exhibits the same symptoms of gradual refrigerant loss and declining cooling performance, despite being a 2021 model year. In researching this issue, I found multiple reports from other 2021 Accord and 2021 Accord Hybrid owners describing similar A/C condenser failures and refrigerant leaks. I am submitting this complaint because I believe there may be a broader pattern affecting 2021 Accord vehicles that warrants review. I am requesting that NHTSA document this complaint and evaluate whether similar failures are occurring in 2021 Honda Accord and Accord Hybrid vehicles.