What 217 owners told NHTSA about the 2021 Honda Accord Fhev

Hello, I have a 2021 Honda Accord Sport 2.0T Engine. The engine has a 2.0 liter turbo. I have had to replace two fuel pumps, which were covered my extended warranty. Another issue that I had to repair, and one that has not fully been resolved is the head gasket. I have been losing coolant at an alarming rate. Every two weeks I have to fill up coolant. I had the head gasket repaired at a Honda Dealership, and this is currently being diagnosed by another Honda Dealership, as I do not want to deal with the Honda Dealership in Cedar Rapids, Iowa. Currently, a Honda Dealership in Iowa City, Iowa is handling the issue, but the head gasket along with the cylinder head were originally repaired in October 2025. Since December 2025, I have been losing coolant on a regular basis. I still have 5,000 miles left on my extended warranty, but there have been many owners who have had their head gasket replaced, or are needing replacement, and Honda refuses to acknowledge that there is a manufacturing defect with the engine. The 2.0 liter turbo engine has a major design flaw with it's cooling passages, and Honda has yet to come up with a resolution. Having an engine overheat is a major safety concern! The current dealership is driving my vehicle on a regular basis, in fact the service advisor is driving it to work and back home (35 miles each way) to replicate the problem. At this point, a recall should be issued by Honda, as there is currently a class action lawsuit that has occurred in the state of California.

NHTSA ODI 11717122

I turned my car on and it didn't want to crank up. Once it did crank up every warning light came on. My son ran the code and P00087 came up. I tried to drive my car in my parking lot and it kept stalling like it was going to cut off. Now I drove my car earlier in the day and didn't have any problems. It wasn't until after my car sat throughout the day when this took place. I know it's a recall for fuel pump issues but my car isn't included.

NHTSA ODI 11716500

Financed a used 2021 honda accord sport in April of 2024 with 68,671 miles. About a month ago, with no warning signs of any sort such as overheating etc...my car did not want to start, finally started but was sputtering with a rough idle, my dash lit up with like 7 or more warning lights. Including a flashing check engine light. All the were safety warnings from braking system not working, to power steering to emissions failure, etc... and to take to dealership. Got the car to a local mechanic to get a diagnostics reading and was told I had a misfire in cylinder 2. Replaced the #2 coil and spark plug. Thought everything was fine until picking up my daughter from school and then all those warning messages lit my dash up again including the flashing check engine light. Car started sputtering and went into limp mode. Lost power and by the grace of God was able t9 coast off the major Blvd away from traffic and out of harms way. Very, very scary. My life literally flashed before my eyes. Not only my life was in danger but my daughters along with other drivers around me. So I took it back to mechanic and he ran diagnostics again still had a misfire. He could not pin point the exact problem. Took it to the dealership and they confirm it was a faulty head gasket between CYL 2 and water jacket. And they quoted me a price of 5,998. Which i can not afford. And feel Im not responsible for catastrophic major mechanical failure. I maintenance my car regularly thru the dealership so they have record of me properly maintenancing the car. Head gasket failure at 80,000 miles is absolutely unheard of. Until I started researching and come to find out this is a design flaw made by Honda. I was flabbergasted with the amount of people with the exact type of problem. Im afraid that even after repairing this problem that it may happen again down the line. And that would be putting my life in danger. Vehicle is still at dealership being that I can not afford the repairs.

NHTSA ODI 11716060

Starts Vehicle at cold start and notice right away engine turbulence, engine light flashing, lost some coolant and white smoke. Scan vehicle for codes, engine misfire #2.

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Head gasket blew randomly. Just hit 100,000 miles. I was on the highway and my speed just started to decrease 65 to 35

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Stretch timing chain 1.5 T, 86000 miles. It is very common in these motors. Just had to pay $2400 to have it replaced

NHTSA ODI 11714285

Honda head unit touch screen is glitching while driving. This causes my navigation system to shut down or freeze and then I am unable to use the touch screen entirely. The dealership has confirmed this as an issue that other people are experiencing as well.

NHTSA ODI 11713525

This problem is seemingly widespread from one google search! The infotainment system screen will randomly start doing “ghost touches,” tapping random areas of the screen which is distracting but also clicking on things that shouldn’t be casually clicked like emergency calling or calling a random number! The screen would end my navigation, mute the speaker, go back, switch to a different app, etc. There is no warning lights or anything. The honda dealerships seem to realize that this is a know issue but will not replace it. They stated that replacing it is doesn’t always work as the problem returns. My car is perfect besides this issue and has never been in a crash.

NHTSA ODI 11710832

All lights on dash. Fuel injectors need replacing at 35000 miles.

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

NHTSA ODI 11706425

The contact's girlfriend owns a 2021 Honda Accord. The contact stated that while his girlfriend was driving at an undisclosed speed, the check engine warning light and several other unknown warning lights illuminated. Additionally, the contact stated that the engine was slightly misfiring while driving. An independent mechanic replaced the spark plugs and the ignition coils at the residence; however, the failure recurred 3 weeks later. The mechanic inspected the vehicle but could not determine the cause of the failure. The vehicle was taken to the dealer, where it was diagnosed with head gasket and fuel injector failure. The contact was provided an estimate for the repair. The vehicle was not repaired due to the cost. The manufacturer was not notified of the failure. The failure mileage was approximately 74,000.

NHTSA ODI 11705837

Vehicle accelerated on its own and propelled the vehicle over a curb and into a building. This occured even though the gear shift was in the Park position. My grandchild and I were thrown forward as vehicle hit the building. Vehicle has not been inspected since incident occurred just yesterday, 11/20/2025. No warnings preceded the incident,

NHTSA ODI 11700745

I am reporting a safety-related issue on my 2021 Honda Accord Hybrid involving a failure of the heating and climate control system. The vehicle is unable to produce heat or properly defrost the windshield, which significantly reduces visibility in cold weather. This directly impacts safe operation during winter conditions and should be considered a safety concern rather than a comfort issue. A Honda dealership diagnosed the problem as a heater core failure. The heater core itself is approximately 150, but the repair requires extensive disassembly and is estimated at nearly 2,000 due to labor. This type of failure should not occur on a vehicle this new. I recently purchased the car and do not believe this is normal wear or maintenance. Honda was contacted and denied goodwill assistance, stating they have no record of other complaints. I have since found similar reports from other Accord owners experiencing heating failures, particularly on hybrid models. This failure prevents windshield defogging and makes the vehicle unsafe for winter driving. I am documenting this issue with NHTSA so that the safety implications of heater failure on this model can be formally reviewed. I can provide the dealer diagnostic report, repair estimate, and Honda case number upon request. Vehicle Details: 2021 Honda Accord Hybrid EX VIN: [XXX] Mileage at failure: 47000 Date diagnosed: 11/13/25 Location: Salinas, CA Please advise if additional documentation is needed. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11700645

The infotainment screen repeatedly overheats and runs through ghost commands (commands not initiated by the user). This includes repeated, unsolicitated phone calls, texts, radio changes, GPS commands, system tones, etc. This is dangerously distracting and takes the drivers attention off the road ahead. Honda 39710-TVA-A23 DISPLAY, CTR (8INCH) 2018-2022 Honda 39710TVAA23

NHTSA ODI 11699113

The head gaskets are known to fail on the 10 generation accord. It failed on my 2021 Honda accord ex-l. I left work and while I was driving the dashboard lit up with every possible light. This was quickly followed by the vehicle losing power on the highway. I ultimately got it repaired by a Honda certified mechanic. The mechanic took it to a Honda dealer to confirm it was the gasket, in which it was. There were no warning lamps message or other symptoms prior to the failure. At the time of power loss I was on an 8 lane highway at 70mph. Luckily no accidents occurred, but the failure definitely put my safety at risk along with others. The mechanic I took my vehicle to has all available information if needed upon request.

NHTSA ODI 11695539

I hereby state that my 2021 Honda Accord has experienced major mechanical failures involving the transmission and head gasket. The vehicle began exhibiting mechanical issues including rough shifting, loss of power, and engine overheating. Upon inspection by a qualified automotive technician, it was determined that both the transmission and head gasket have failed prematurely. These failures have rendered the vehicle unsafe and inoperable, resulting in significant repair costs, loss of use, and financial hardship. The nature and timing of these failures suggest a possible manufacturing or design defect. This statement is submitted in support of a formal claim and potential legal action against the responsible parties for the defective condition of the vehicle.

NHTSA ODI 11694898

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.

NHTSA ODI 11694798

Car will drive fine , then all of a sudden it shuts completely OFF on the highway which is a MAJOR safety concern. ALL the lights will pop on in the dash board without any warning. Car will act as if it doesn’t want to pick up speed then after about 10-15 mins starts driving fine . This is my second time contacting you all regarding the same issues . Honda needs to definitely do a RECALL ASAP this is NOT SAFE at all to be driving around like this . ALOT of customers driving 2018-2022 Honda Accords have been having the same EXACT issues ..

NHTSA ODI 11694363

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.

NHTSA ODI 11694400

infotainment system glitching

NHTSA ODI 11693007

The contact owns a 2021 Honda Accord. The contact’s spouse stated that while driving at an undisclosed speed, the Lane Keep Assistance feature became inoperable. The contact’s spouse stated that the feature was erroneously activated and deactivated. The contact stated that while the LKAS was activated, the vehicle jerked abnormally. The contact expressed concerns about the failure. The contact stated that the safety feature was very hazardous and could pose a risk to the driver and other vehicle operators. The vehicle was taken to the dealer, but was not diagnosed or repaired. The manufacturer was made aware of the failure, and a case was opened. The approximate failure mileage was 60,000.

NHTSA ODI 11692316

Head Gasket Blown i had a diagnosis ran at the honda dealership and it came back as a blown gasket its Preventing me to accelerate whole on the highway im going at high speeds and it slows down like im slmming on brakes

NHTSA ODI 11691826

Radio/ car play jumping screens cuts in and out just randomly. Sometimes goes completely black screen

NHTSA ODI 11691438

While driving, all of my dashboard warning lights turn on at the same time. On several occasions, the vehicle has also completely shut off while I was driving, creating a dangerous situation where I lost power steering & braking assistance. I request that your safety/ recall department investigate this issue immediately to determine whether it falls under an active recall or should be added as a new recall. I know several people who has the same issue in my city with the same model car as mines. plus I seen on social media where people who has the model as mines have the same issue.

NHTSA ODI 11691133

This vehicles have a engineering flaw in the design of the head gasket failing prematurely disabling all components of vehicle at any given time wether it’s in the highway or local the car will basically shut itself down causing a major risk for the driver and civilians even death. This is a safety hazard, tragedy waiting to happen y’all should act now theirs multiple and quiet frankly the Corporation should be taking care of it since they are still allowing them out on the road even with knowledge of this issue the customer should not loose their life nor money to a mass production engineering flaw that’s is over seen by NHTSA, HONDA. I got in to an accident due to my vehicle not being at 100% because of the head gasket issue the cars availability to detect or use its components, mechanically or electrical.

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