2018 Honda Accord

I own a 2018 Honda Accord Sport 2.0T that has been consistently maintained through authorized Honda dealerships. On July 30, 2026, at 135,968 miles, I took my vehicle to Nalley Honda for a Blind Spot Information System warning and maintenance. The dealership performed a multi-point inspection and documented the spark plugs, cooling-system hoses, and fluid leaks as PASSING. I authorized approximately $1,231 in repairs and maintenance. Only days and approximately 202 miles later, multiple warning lights appeared. I returned to the same dealership. At 136,170 miles, Honda documented DTC P0302 (Cylinder #2 Misfire). The injectors passed an air-fuel test. The technician then noted pressure releasing from the cooling system despite low coolant temperature. A head-gasket leak test was performed and FAILED. Honda diagnosed a blown cylinder head gasket and recommended approximately $4,906 in repairs, including spark plugs that had passed inspection only days earlier. I am concerned about the sudden failure of a major engine component in a well-maintained vehicle, particularly so soon after a Honda dealership inspection. I have learned that other Honda Accord 2.0T owners have reported premature head-gasket failures. A failed head gasket can result in misfires, coolant loss, overheating, reduced engine performance, and potential engine damage while driving. I am requesting that NHTSA review this complaint along with similar complaints involving Honda Accord 2.0T head-gasket failures to determine whether a defect trend exists and whether an investigation is warranted.

There is a hole in the engine block and it happed while I was driving, people could’ve been hurt on the road because of this mechanical failure. Vehicle has only been inspected by a private mechanic who found the problem. There was no warning of this besides a add air to tire warning.

Car went into limp mode and was struggling to accelerate, went and got it diagnosed and was notified that my spark plugs needed to be replaced. Car began running fine but a few months went by and the issue came back. I was told I needed my spark plugs changed again. After the third time, I went and had my car diagnosed again and was told I needed a battery for the car because it was drained. Then I got the Turbo replaced and still the issue remains. All lights on the dashboard are on, car overheats and goes into limp mode, sometimes not accelerating over 20 MPH. My car went into limp mode on the highway, this scared me, so I haven't drove it since. Ive seen countless comments of users with the same make and model, experiencing the same issue. Its sad that Honda, known to be a trustworthy and reliable brand for years would do their customers like this, especially considering the state of the economy at the moment.

The contact owns a 2018 Honda Accord. The contact stated that while driving at an undisclosed speed, the AC evaporator became inoperable and was blowing hot air. The contact stated that the failure had been occurring since the vehicle was purchased in 2018. The contact stated that the evaporator was leaking. The dealer confirmed the failure. The manufacturer was notified of the failure. The vehicle was not repaired.

On August 29th 2026 at 1:28PM (13:28) 148,320 mi. on odometer During interstate driving and topping the Sunshine Skyway Bridge on Interstate 275 Northbound (27.617863, -82.653639) the vehicle detected both road departure and engaged the emergency automated braking due to the shadow generated by the superstructure of the Skyway Bridge falling on the road surface. The vehicle attempted to correct the "road departure" by steering the vehicle away from the perceived problem and violently engaged the brakes nearly causing a collision as it has done numerous times before. In this particular event, it was an extraordinarily dangerous situation given the location that it occurred (190ft in the air on a walled in 2 lane interstate highway). I have reported this to NHTSA and American Honda on multiple previous occasions and await a repair or even an acknowledgement of this extremely dangerous issue. Honda has opened a case on this but have had 12+ months and no response has been issued.

I purchased my 2018 Honda Accord Sport from CarMax on January 16, 2026, and I have had several serious problems with the vehicle since purchasing it. Every warning light on the dashboard has come on, my radar system will not stay calibrated, and I have been told that my fuel injectors need to be replaced. In addition, the relay module was already broken when I received the vehicle, which causes the interior lights in my car not to work properly. These issues have caused serious concerns about my safety and the safety of others because I cannot depend on the vehicle’s safety systems or know when another component may fail. The vehicle and affected components are available for inspection upon request. I have attempted to get these problems addressed, but I have not been able to get a satisfactory resolution. The issues have been identified/diagnosed, and I am seeking further inspection to determine the full extent of the problems. I have not had the vehicle inspected by the police or an insurance representative, but I am trying to get the manufacturer/dealer involved so these issues can be properly documented and addressed. I am especially concerned because I have only had this vehicle since January 16, 2026, and I have already put a significant amount of money into it while still owing a substantial amount on the loan. I was also informed that the vehicle could potentially be considered a total loss within the next couple of months. I do not believe it is reasonable for me to be left responsible for a vehicle that I recently purchased from CarMax and that has developed or revealed so many serious problems. I am requesting assistance in determining whether these issues can be properly repaired, whether the vehicle is safe and reliable to drive, and what options are available to me for a resolution given the amount of money I have already invested and the remaining balance on my vehicle loan.

In September 2025, all dashboard lights came on while driving down the road. I immediately pulled over and turned the car off. When turning the car back on, all lights remained on and I drove to the nearest repair shop, where at this time it was beginning to run hot. I was told at this point that the head gasket had blown and this would need to be replaced. I replaced the head gasket for $4100.00. After that, in October 2025, I had to replace the fuel injectors and coil packs. In February 2026, driving down the road, the car was not running hot but all lights came on the dash again and it went into limp mode. The car had to be towed to a repair shop where it was stated that coil packs needed to be changed again. In August 2026, the turbo had to be replaced, resulting in an additional $2500.00

The car dashboard Is lit up and loose power out of nowhere when driving .

I am reporting a suspected head gasket/engine defect involving my 2018 Honda Accord Sport. My vehicle experienced multiple engine-related problems before ultimately requiring head gasket replacement and cylinder head repair. On July 27, 2024, at approximately 161,480 miles, the turbocharger was replaced. In September 2025, at 207,539 miles, my vehicle was serviced at Joe Morgan Honda, an authorized Honda dealership. During that visit, the Honda technician documented that the cooling system fluid level was low and that no external leaks were found. The technician documented that they suspected the head gasket was causing internal coolant loss over time. I was instructed to monitor the vehicle and was provided an estimate of approximately $4,400 plus tax for head gasket replacement. I specifically asked the Honda service advisor whether the head gasket could be repaired at that time or whether anything could be done to prevent the suspected problem from progressing. I was told there was nothing that could be done at that point other than monitor the vehicle. Within weeks, multiple warning lights illuminated on my dashboard and the vehicle began experiencing significant drivability problems, including hesitation, misfiring, and loss of acceleration. The loss of acceleration was particularly concerning because the vehicle did not respond or accelerate normally while being driven. I took the vehicle to Integrity Automotive on September 25, 2025, at 208,583 miles. The engine was checked, and the ignition coils and spark plugs were replaced. Despite those repairs, the vehicle ultimately required major engine repairs on November 8, 2025, at 210,230 miles. The cylinder head gasket was replaced and the cylinder head was serviced/repaired. The fuel injectors, spark plugs, and serpentine belt were also replaced, and the cooling system and drivability/performance were checked. Only approximately 2,691 miles elapsed between the Honda dealership documenting the suspected i

The contact owns a 2018 Honda Accord. The contact stated that while driving at an undisclosed speed, several unknown warning lights were illuminated, and the vehicle went into LIMP Mode, and the vehicle failed to exceed 5 MPH with the accelerator pedal depressed. The vehicle was taken to a dealer where it was diagnosed and determined that the turbo boost and head gasket needed to be replaced. The vehicle was repaired; however, the failure persisted. The failure had occurred on several occasions. The vehicle was towed to an independent mechanic where it was diagnosed and determined that the engine needed to be replaced. The manufacturer was notified of the failure. The failure mileage was approximately 100,000.

Car losing power on the interstate and side roads Replaced spark plugs, replaced coil packs replaced fuel injectors after dealers diagnostic testing $2500 for those issues Vehicle still misfiring took in to another dealer head gasket need replacement $5200 quote

Issue 1: Faulty Collision Mitigation Braking System & Subsequent Crash Incident Details: In July of 2025, my vehicle’s automatic braking warning lights randomly activated and triggered an unprompted, emergency stop on [XXX]—despite having no vehicles ahead of me. This sudden malfunction directly caused a rear-end collision on the interstate. Documentation: A formal crash report was filed with the Georgia State Patrol. Ongoing Risk: The false automatic braking warnings continue to trigger randomly, creating an extreme safety hazard for myself and surrounding traffic. Issue 2: Premature Turbocharger Failure & Cracked Head Gasket Diagnostic Timeline: Immediately upon picking up the car from a body shop repair, every warning light on the dashboard illuminated erratically. After Ed Voyles Honda in Marietta claimed nothing was wrong, the body shop replaced a potentially loose battery cable. The issue persisted, and Shottenkirk Honda in Cartersville ultimately diagnosed a total turbocharger failure in March 2026. Out-of-Pocket Cost: Honda denied any goodwill coverage despite the widespread, documented failure of these 1.5L engines across 2018–2023 models. I paid $1,700 out of pocket to replace the turbocharger. Escalating Failures: Shortly after the turbo replacement, the head gasket cover cracked—another notorious, widely recognized defect inherent to this specific engine setup. At only seven years old, this vehicle has proven to be unreliable, dangerous, and financially burdensome. The known defects in the 1.5L powertrain warrant a widespread recall. Given my long-standing loyalty and the severe nature of these defects, I request a full reimbursement of the $1,700 turbocharger repair costs and an immediate investigation into the phantom braking issue. I expect a prompt reply outlining how Honda intends to resolve these safety issues. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Turbo has gone out and it's several thousand dollars to get fixed and will eventually affect the overall lifespan and performance of the engine if not repaired in a timely enough fashion. There is no recall for this specific issues even though thousands of Honda Accord owners are dealing with the same failure/repair and there are no offers of goodwill assistance from the dealership or manufacturer. The dealership assured that engine failure is inevitable without a turbo replacement and they can't determine the extent of the damage that's already been done to the engine since the turbo showed signs of failure.

These 9 things are on my dashboard- I’ve called Honda corporate to see if they could do something about this because I’m not the only one with this problem. My car is now barely drivable and the dash have not went away Emission system Road departure mitigation system Brake system problem Collision mitigation braking system Hill start assist problem Adaptive cruise control system Vehicle stability assist system problem Electric power steering system

turbo and the head gasket

The contact owns a 2018 Honda Accord. The contact stated that while driving, the vehicle failed to exceed 35 MPH. Several unknown warning lights were illuminated. The contact pulled over to the side of the road and restarted the vehicle; however, the failure persisted. The vehicle was taken to the dealer, where it was diagnosed with a blown head gasket. The vehicle was not repaired due to the cost. The dealer was in the process of contacting the manufacturer for assistance. The manufacturer had not yet been directly notified of the failure by the contact. The failure mileage was approximately 103,000.

A lot of warning sides are on the dash , has been coming on every since the mileage hit 100k

i have a 2018 honda accord. it used to have only wired carplay. i paid a honda dealer for the official advertised wireless carplay upgrade. over a year later suddenly the head unit doesn't work. it just shows "please insert usb drive containing valid software license file, and press ok button." many people online are reporting this issue. the honda dealer that did my original install refuses to fix this issue free of charge, and they are unable to assure me that they are aware of the issue and have a confirmed fix. i refuse to pay them to do a diagnostic just for them to tell me they can't fix it, or to give me a temporary fix that will break again later

In June of 2026 I was merging onto a busy high way trying to accelerate on while in the middle of the high way my car completely starts decelerating while next to two semis and not being able to do anything as I finally get to the side of the high way I turn my car off and back on all of my lights started coming on and appearing on my dash while this was all happening I start the car again and it is doing the same thing not accelerating and while trying it is jerking this could have killed me or others due to my faulty head gasket Honda wants me to pay $4,000 to replace this head gasket I am a college student with no money and still having to pay my car payment I have a 2018 Honda accord 1.5L turbo engine and still have not been able to drive my care due to this I have a 118,00 miles and it started acting weird before I even hit 100k miles this is not okay this could have harmed others due to these faulty issues I see it is a wide spread concern and something needs to be change and I was also denied the goodwill act due to this I start school next week 45 min away and can’t even go to my class for nursing I’m disappointed in Honda this was supposed to be a long term car

Engine making noise when start, took to dealer, it was diagnose with head gasket gone. All services done from dealer since purchased and now dealer is saying gasket replacement.