What 1,812 owners told NHTSA about the 2018 Honda Accord Fhev

My Accord reported multiple warnings at engine start up (check engine light, warnings about cruise control, etc.), and the engine ran rougher than normal. I immediately drove to a Honda dealer for service. The Honda dealer, Checkered Flag Honda of Norfolk, Virginia, diagnosed a blown head gasket in cylinder 2, which allowed all coolant to drain into the engine. They also indicated that fuel injectors and spark plugs were compromised and required replacement. The vehicle has approximately 75,000 miles, has received regular maintenance, and was operated in normal driving conditions.

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Blown head gasket at ~94k miles. Cost over $7k to replace with a used engine and Honda offered zero reimbursement assistance. This is a major problem on the 10th generation engines.

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At approximately 159,000 miles, my vehicle exhibited multiple dashboard warning lights simultaneously including ABS, VSA, EPS, TPMS, brake, ACC, CMBS, and RDM warnings along with engine misfire codes. Borescope inspection confirmed coolant intrusion into cylinder 1. Cylinders 2, 3, and 4 were dry. Diagnosis confirmed head gasket failure consistent with the known design defect in the 1.5L turbocharged i-VTEC engine related to inadequate head bolt clamping force versus boost pressure. This failure is the subject of active class action litigation (Bissell v. American Honda Motor Co., Case 3:24-cv-02286-AJB-MMP). Vehicle requires full head gasket replacement at my own expense estimated at $900+. No recall has been issued despite widespread reports of identical failures across 2018-2022 Honda Accord 1.5T vehicles.

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I bought this car used and I've only had it two months and the head gasket has blown. I didn't know the 10th generation had bad gaskets and turbos i found that out after I purchased the car. Literally everyone i know now that had one the gasket or turbo went out. Not only that it was a recall on my fuel pump no one told me about until I added it to my insurance and they told me. Yes Honda dealership fixed it for free now it needs to be a recall on these turbos and head gaskets. It's not fair. I wouldn't recommend Honda to no one now and they say Honda last a lifetime. Thats not true quit making the 10th generation and take it off the market.

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What component or system failed or malfunctioned, and is it available for inspection upon request? I own a 2018 Honda Accord with approximately 132,000 miles. Shortly after my vehicle was serviced for the fuel pump recall, multiple warning lights and system failure messages appeared simultaneously. The affected systems include Road Departure Mitigation, Emission System, Adaptive Cruise Control, Auto High Beam, Collision Mitigation Braking System, Electric Power Steering, Vehicle Stability Assist, Tire Pressure Monitoring System, Hill Start Assist, and the Air Bag System. The vehicle is available for inspection upon request. How was your safety or the safety of others put at risk? The failure of multiple safety and driver-assistance systems has created a significant safety risk. My vehicle is currently operating in limp mode, resulting in reduced performance and making it difficult to drive safely in traffic. The loss or malfunction of systems such as collision mitigation braking, power steering, vehicle stability assist, adaptive cruise control, and air bag monitoring increases the risk of an accident and could jeopardize the safety of both vehicle occupants and other motorists. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. I took the vehicle to a Honda dealership for diagnostic testing after the warning lights appeared. The dealer confirmed that multiple systems were reporting faults. I was advised that numerous components would need to be replaced at a substantial cost. Prior to the fuel pump recall service, I had not experienced any of these issues and the vehicle operated normally. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle has been inspected by a Honda dealership for diagnostic purposes. To my knowledge, it has not been inspected by Honda corporate, law enforcement, or insurance representatives. Were there any warning lamps, mes

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When going 55 mph car started leaching back and forth aggressively followed by loss of engine power. Car decelerated to a max of 20 mph and would not accelerate past that. This caused the potential of getting rear ended in traffic. When I took it to the mechanic, they told me that my first cylinder was misfiring and that my fuel injector was the issue. A warning light only came on after the car decelerated to a low speed.

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1. What component or system failed or malfunctioned, and is it available for inspection upon request? I purchased my 2018 Honda Accord in 2024, and in 2025, I experienced significant issues with the vehicle. During my visits to both Honda of Southaven and Honda of Tupelo, they indicated that the head gasket might be the problem, which is a known issue with this model. I believe the malfunction is related to this component, and I can confirm that it is available for inspection upon request. 2. How was your safety or the safety of others put at risk? The issues with my vehicle have directly endangered my safety and the safety of my children. While driving, the car started jerking unexpectedly and then cut off entirely on the highway, which could have resulted in a severe accident. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, I have visited Honda of Southaven and Honda of Tupelo over three times reporting these problems. Both dealerships acknowledged the issue, with one dealership stating it was likely the head gasket, which they mentioned seeing frequently with Honda vehicles. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? I have not had an inspection by the manufacturer or police. However, I have had my vehicle inspected by two authorized Honda dealerships, where they diagnosed the problem. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Yes, before the failure, there were multiple warning lights on the dashboard, which indicated that something was wrong with the vehicle. These symptoms began appearing shortly after I purchased the car in 2024, and they escalated over time leading up to my visits to the dealerships in 2025.

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I purchased the car in November 2025 from Carvana. By December, all the dashboard lights came on and no one can locate the problem. The car still runs but not to its optimum performance.

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Blown head gasket

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1. Head gasket and turbo system 2. I was driving on the highway at 55mph and the front end of the car started to shake so I pulled over to inspect the car as best I could. 3. The Honda dealer did a diagnostic for my AC $450 and $200 for the hazard lights. I was told my AC needed to be charged and then the prices to replace my head gasket, turbo and coolant flush for a total of 10k. 4. All of the warning light came on in the vehicle as I was driving and my AC started to blow warm air June 29, 2026.

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My Engine is overheating, cannot drive the car at all. There is Coolant loss and leaking into the cylinder. It is Rough running and misfires: no matter when I start the Honda whether a fold start or not it is chunky and wants to give out. There is Loss of power which makes my car feel sluggish and is very dangerous as I’m driving myself, children and family on the freeways of St. Louis. I have never had any other issue and maintained the maintenance on the car. Honda dealership wants 6k to start fixing it. Could be more after they get into it.

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A loss of power while driving on the freeway created a dangerous situation and nearly caused an accident. The issue was diagnosed by the Honda dealer as a misfire of the 3rd cylinder due to a head gasket failure and a fuel injector issue. No other symptoms were detected as this appeared suddenly at the worst possible time.

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I own a 2018 Honda Accord LX 1.5T. The vehicle has developed an intermittent hard-start condition after sitting overnight. The engine cranks for approximately 5–6 seconds before starting and runs very rough for the first 2–5 seconds before smoothing out. Warm restarts are normal. While driving, the vehicle hesitates and stumbles during acceleration, is slow to build RPM, and fuel economy has noticeably decreased. During one hard acceleration event, the vehicle lost power and the check engine light flashed. I also observed that if I turn the ignition on and allow the fuel pump to prime for several seconds before starting the engine, the vehicle starts noticeably quicker than if I start it immediately. This makes me concerned that the fuel system may not be maintaining proper fuel pressure after the vehicle sits. Because of the hard starting, hesitation, intermittent loss of power during acceleration, and the improvement after allowing the fuel pump to prime, I am submitting this complaint for investigation because these symptoms could create a safety risk when entering traffic or accelerating.

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Head gasket failure, coolant leaking into cylinder 1 and 3. Car stuttering when try to accelerate and has trouble getting up to speed on highway. Coolant mixing with oil, rear main seal leak. It is available for inspection currently at dealership where it was diagnosed. My safety was jeopardized because I barely can accelerate on the highway causing cars to tail gate me and potentially crash into the back of me. The issue has been confirmed by Honda service department as a faulty head gasket. There were no warnings signs, no overheating nor any smoke indications of a faulty failing head gasket only stuttering at low spreads and not being able to accelerate. The problem first appeared a day or so before I brung it to Honda for a diagnosis. These are well none litigated issues with these head gaskets and are safety concerns that they’re failing to address.

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at 154,000 i’m forced to replace my head gasket and fuel injectors and lots of other stuff because my head gasket failed driving in the freeway and went into limp mode and several light turned on and lost all power thankfully i was able to pull over safely and shut off the vehicle for 10 minutes and start back up with no limp mode and drove to honda and informed me my head gasket failed had failed my last honda was at 320,000 and no head gasket failed this is insane and no recall or fix

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The vehicle suffered a sudden, severe structural head gasket failure causing coolant to flood the combustion chambers. This results in violent engine stalling, limp mode, and complete loss of propulsion while driving at highway speeds, creating a severe traffic hazard. The manufacturer is actively tracking this conjoined cylinder failure but refusing to issue a safety recall for the defective engine block layout while their local dealerships dangerously misdiagnose the problem and leave customers with unreliable and unsafe vehicles.

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At 157000 miles I am being forced to replace my fuel injectors and a blown head gasket on my 2018 Honda Accord. As I am sure you are aware, this is an ongoing issue with this model specifically, and yet no recalls have been issued. Please understand that this was a sudden failure as I had no signs there was an engine issue before being forced into limp mode while driving on the freeway. I also had my mother in the car when all of a sudden, my car could not go above 25 mph while in traffic. Thankfully we could pull over safely and were not hurt or killed. All the lights/warning messages on the dash became illuminated before finally settling on an “emissions problem.” All other warning symbols remained lit. My thermostat started to rise dangerously high especially while idling. I cannot stress how terrifying or dangerous this was. After a diagnostic last week at a Honda dealership, I was told I have a cylinder 3 misfire and that after they pressurized the system, they found a coolant leak which is due to the head gasket. I was also told my fuel injectors (which were just replaced in Sept. 2025) are already in need of replacement as well, but that I would only be charged parts for this repair as it would be included with the labor of having to tear down the engine. Despite this, I was still provided an estimate with the full cost of the fuel injectors as well at nearly $1600. My grand total for these repairs came to $6895. I was told at most it would be $6300 – not that that is much of a discount on an issue that should have been recalled. Again, this is a known design flaw and NOT a result of my neglect.

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Blown Head Gasket

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2018 Honda Accord EX-L with the 2.0L turbocharged engine. At approximately 113,000 miles the head gasket failed, allowing engine coolant to leak into cylinders 2 and 3. Symptoms included repeated cold-start engine misfires (diagnostic codes P0302, P0303, P0300), illuminated check-engine light, intermittent loss of power / limp mode, and gradual loss of coolant with no visible external leak. The failure was confirmed by an independent mechanic as a blown head gasket between cylinders 2 and 3. This matches a widely reported design defect in Honda's 1.5L and 2.0L turbocharged engines (2016–2022 Accord, Civic, CR-V, Acura RDX/TLX) that is the subject of federal class-action litigation. The sudden power loss this defect can cause while driving presents a safety risk. Repair cost approximately $6,000, paid out of pocket, with no recall in effect. Requesting NHTSA investigate a potential design defect and recall.

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While on the highway, going approximately 60-65mph, lights on my dashboard suddenly lit up and turned right back off as my car began to decelerate on its own. After I was able to get my car off to the side of the highway, I had to have it towed home as it was inoperable. I had it towed to my preferred auto shop and they discovered the engine had failed at only 84,000 miles. The total cost was approximately $8,600. After a bit of research, it seems this is a known issue for this engine model from Honda and nothing has come of it so far.

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Bad engine, and Honda knows it, and they will not fix my car. I have reported this to Honda America and Honda Japan. Cylinder 2 and the head gasket went bad at 77,000 miles. I am disabled and a full-time student. This was diagnosed at Honda Autonation in Columbus Ga. I even asked whether they would take it as a trade-in. They said no, so my next step is to file a class action lawsuit against Honda when they should have just accepted responsibility and fixed my car. There is a forum on Reddit and Facebook with 1000s of people with the same problem. [XXX] [XXX] Mailing address: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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Head gasket blew, COMMIN PROBLEM AMONG ALL THESE ACCORDS

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Two premature blown head gaskets and warped cylinder heads, the first at 95,000 miles, while driving on the freeway the car started to shake and all warnings lights came on, luckily I was not far from the dealership and took it right in. The second at 137,000 miles. The first repair was done at Honda of Concord dealership and was covered under the extended warranty. Warranty has since expired and the issue has happened again. This time Honda is recommending that I replace the engine, while denying my request for a goodwill repair. The dealership quoted me $10,000 for repair, and my car is maybe worth only $13,000. Honda knows that there's a design flaw with the 1.5L engines, but won't take any accountability for it.

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My vehicle will NOT drive past 20 MPH,it randomly goes into limp mode with traveling ! I’ve have it tested multiple times and no one seems to know what the issue is !

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I own a 2018 Honda Accord. While driving 30 MPH the vehicle experienced head gasket failure/engine failure-trouble. The vehicle lost automotive power and decelerated to 5 MPH. I was able to drive safely. The engine light was illuminated as well as all dashboard lights were illuminated. The vehicle was taken to the local mechanic immediately, where it was diagnosed with a misfire in cylinders #2 a computer code malfunction, and then taken to dealer immediately from there. Dealer ran and found same code. found a blown head gasket. (Charging me a diagnostic code for same reading.) The vehicle was repaired privately as dealer wanted more than $1000. more to do the work. The manufacturer was contacted and assisted with the cost of the repair. The manufacturer confirmed there was no warranty coverage on the vehicle. I am out $4524.66 in repairs due to an issue that Honda is aware of and had done nothing to rectify.

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