I am submitting this complaint regarding an ongoing safety concern with my 2021 Honda Accord. Multiple lights indicate engine system problems which includes, check engine light, car jerks at acceleration, seat sensor recall. I took my vehicle to multiple shops including the Honda Dealership. However, they were unsuccessful to identify the cause. Multiple problems such as Turbo, belt, fuel system problem constantly comes up. I have attempted to take my vehicle for the recall, which was scheduled, however after waiting 4hrs, the dealership stated they did not have the parts. I am concerned about the potential risk to myself, my daughter and my passengers and believe these issues warrant further investigation to help prevent possible accident or injury.
2021 Honda Accord driver assistance problems
73 complaints (30% of all complaints for this car). Typical mileage when it fails: 62,000. 7 crashes reported.
- owner complaints
- 73
- of this car's complaints
- 30%
- typical mileage
- 62,000
- crashes
- 7
- recalls
- 0
Which part fails
- Automatic emergency braking50
- Warnings14
- Adaptive cruise control10
- Warning9
- Assist9
- Blind spot detection3
- Lane keep: automatic steering1
At what mileage
Complaints by mileage at the time of the problem.
Honda Accord driver assistance problems in other years
Specific symptoms reported on the 2021 Honda Accord driver assistance
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Inadvertent Automatic Emergency Braking
On February 21, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation (PE22003) to assess reports of inadvertent activation of the Collision Mitigation Braking System (CMBS), an automatic emergency braking (AEB) system, in model year 2017-2019 Honda CR-V and 2018-2019 Honda Accord vehicles. The reports allege that activation of the AEB system occurs while driving with no apparent obstruction in the vehicle's forward path, resulting in sudden vehicle deceleration. Honda indicated that they were aware of a total of X,XXX reports that may relate to the alleged defect. Honda provided analysis of the alleged defect and alleges that some customers possibly had an inadequate understanding of the CMBS and its limitations.  However, many consumer complaints allege that Honda dealerships were unable to reproduce the condition or state that they were informed that this is considered normal CMBS operation. To date, ODI has received a total of 1,294 consumer complaints of inadvertent activation of CMBS in 2017-2022 Honda CR-V and 2018-2022 Honda Accord vehicles. A total of 31 complaints alleged a crash and 50 alleged an injury. The Total column in the Failure Report Summary removes duplicate reports and shows the total number of reports with unique VINs from all Manufacturer, ODI, and EWR data sources. In some cases, there were multiple reports associated with a particular vehicle in which recurring failures were alleged. In total, there were X,XXX reports, 93 injury incidents and 47 crashes involving vehicles with unique VINs that may relate to the alleged defect. PE22-003 has been upgraded to an Engineering Analysis to further assess the scope, frequency, and potential safety related consequences of the inadvertent AEB activations. The scope has been expanded to include assessment of model year 2020-2022 Honda CR-V and Accord vehicles. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to
EA24002
What 2021 Honda Accord owners say
Most recent owner complaints, unedited.
Was at a stoplight, came to a complete stop once at a complete stop car completely shut all the way off, losing all electricity no hazard lights. You cannot press down on the brakes to restart the car. You could not do anything. Car lost 100% of power 5 to 10 minutes later, Vehicle shut back on automatically and engine started to run automatically.
Sudden braking; car comes to a complete stop and brakes so Hard. Most likely fault from Collision Mitigation Brakking system
The car's infotainment system constantly glitches out and changes channels,outputs,texts,videos while car is being driven. It's very distracting and dangerous. It will literally do it 100's of times within a short period. It's much worse than any text messaging distraction, which is against the law. Several people with this car have the same issue. Also the car will break when there's actually nothing in the road that should make it break but it will just slam on the brakes.
Vehicle started flashing all lights on dashboard. I drove it for awhile and then it eventually went off. A few days later same lights came back on a car started misfiring. Was told by Honda that is was the Turbo that's going bad. Today is just cut off on me. Luckily there wasn't anyone behind me. I see a lot of people are having these same issues and a recall should be put out immediately.
On July 4th 2026, I was leaving from a restaurant that evening and within 5-10 seconds of me turning my car on, all of the lights on my dashboard turned on. I was slightly confused because there were multiple at once and my car was rumbling a bit from under the engine hood. Within a few weeks prior, I’ve been having with my digital car screen switching back and forth between tabs (from the radio, to my CarPlay, to the settings). It will be intermittent but fairly consistent. I plan to take my car to an auto parts store for a code test and battery/alternator test to see if there’s any further issues. I just purchased a new battery for this car within the 3 years of me getting it, 2 years ago and there shouldn’t be any issues. I’m not sure how to proceed and I really don’t have it in me to spend large amounts of money and time with repairs for a supposedly heavily reliable car. My current mileage is at 120,000.
The contact owns a 2021 Honda Accord. The contact stated that while driving at various speeds, the brakes would suddenly apply, stopping the vehicle immediately. The failure had become more persistent. The contact would immediately apply the accelerator, and the vehicle would gradually accelerate forward. The traction control failure, brake system failure, cruise control, and the mediation light were illuminated, all related to the various drive assistance systems within the vehicle. When attempting to shift from the sport mode to economy or regular modes, it shows as unable or failure. The vehicle had not been diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 62,000.
Infotainment Center: I am submitting this complaint regarding my 2021 Honda Accord Sport and the ongoing issues I’ve experienced with its infotainment system. This problem has been persistent, unpredictable, and increasingly concerning from both a usability and safety standpoint. Since purchasing the vehicle, the infotainment center has repeatedly malfunctioned without any warning. The screen will freeze, switch from setting to setting, or become unresponsive to touch input. At times, it will randomly reboot while I am driving. These issues occur regardless of whether I am using navigation, Bluetooth audio, or even when the system is idle. This also affects the ADAS, periodically, warnings will be displayed, and then not show up. What makes this especially troubling is how it affects my ability to safely operate the vehicle. For example, when the system freezes, I lose access to navigation directions mid-route, which forces me to either drive without guidance or attempt to troubleshoot the issue while on the road. Similarly, when using hands-free calling or music controls, the glitches can be distracting and require repeated attempts to regain control, taking my attention away from driving. I rely on my vehicle daily, and this ongoing issue has caused a great deal of frustration and concern. A modern vehicle’s infotainment system is not just a convenience—it is integrated into essential driving functions. When it fails, it directly impacts driver awareness and safety. I am requesting that this issue be investigated further, as it appears to be a systemic problem rather than an isolated defect. I hope that by reporting this, it may help lead to a resolution for myself and other drivers experiencing similar problems.
Car went into limp mode
The lights and warnings below popped up on my dash after the engine light had come on and then off again for about a week. See below, -Emission system problem Avoid heavy acceleration and high speed. See dealer -tpms light -brake system problem -brake hold system problem -electric power steering system problem -vehicle stability assist system problem -hill start assist problem -adaptive cruise control system problem -collision mitigation braking system problem -road departure mitigation system problem Went to get diagnosed at the dealership and was told that the turbo on my engine had failed. Mechanic said it had nothing to do with me and that it failed on its own. I saw that it was a reoccurring problem with other Honda owners with the same year, make, and model as mine but are being given the run around and no solution.
Questions about the 2021 Honda Accord driver assistance
Does the 2021 Honda Accord have driver assistance problems?
Owners have filed 73 complaints about the driver assistance of the 2021 Honda Accord, 30% of all its complaints, more than any other problem.
At what mileage do 2021 Honda Accord driver assistance problems start?
The typical (median) mileage in owner complaints is 62,000 miles.
Was there a recall on the 2021 Honda Accord driver assistance?
There is no recall for this problem on this model year.
What year does the Honda Accord have the most driver assistance problems?
The Honda Accord model years with the most driver assistance complaints are 2018 (403 complaints), 2019 (178 complaints) and 2020 (115 complaints).
Other 2021 Honda Accord problems
Electrical 68Engine 42Brakes 31Fuel system 18Airbags 15Transmission 14Acceleration 9Steering 8Seat belts 6Visibility 5Body 3Lights 3Seats 3Suspension 3
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