What 1,812 owners told NHTSA about the 2018 Honda Accord Plug In Hybrid

Known issue by Honda; 2018 Honda Accord Sport, 1.5L 6S Manual Transmission. Head Gasket is blown, alongside failed fuel injectors for the 1.5L motor. Vehicle has been misfiring. Not accelerating properly which is causing the vehicle to suddenly slow down in traffic, promting potential vause for accidents. Almost was involved in 2 accidents due to the sudden and complete loss of power at a decent rate of speed. CEL came on twice, which then disappeared and the vehicle acted "normal" until acceleration. Took vehicle to a Honda Dealer and was told it was the "spark plugs and the coil packs", even after explaining to them that there was engine oil on the piston heads, and low coolant. Left the dealer upset that they barely did any diagnostic work, and took it to an independant shop that actually completed a proper diagnostic performance, and confirmed the head gasket is leaking coolant, and the fuel injectors are failing. Known common issue that Honda is failing to recognize.

NHTSA ODI 11746425

The contact owns a 2018 Honda Accord. The contact stated that the vehicle was taken to the dealer for an oil change; however, after leaving the dealer, the vehicle stalled while driving 25 MPH. The contact returned to the dealer and notified the dealer of the issue. The contact was informed that the vehicle had experienced head gasket failure and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact was referred to the NHTSA Hotline for additional assistance. The failure mileage was 99,000.

NHTSA ODI 11746295

I own a 2018 Honda Accord equipped with the 1.5L turbocharged engine. At approximately 53,666 miles, the vehicle developed a rough idle, engine shaking during startup, intermittent check engine light, and a cylinder 1 misfire code (P0301). I took the vehicle to a Honda dealership for diagnosis. The dealership confirmed coolant intrusion into cylinder #1 after performing a cooling system pressure test and borescope inspection. The dealership determined that the engine has a failed head gasket and provided a repair estimate exceeding $6,000. The dealership advised that the vehicle should not be driven because coolant entering the cylinder can cause further engine damage, loss of power, engine stalling, overheating, or complete engine failure while driving. I believe this is a safety concern because the engine may misfire, lose power, or fail unexpectedly during vehicle operation. A major engine failure at only 53,666 miles is not consistent with normal wear and tear. I am submitting this complaint so that NHTSA can investigate potential defects involving coolant intrusion, head gasket failure, and cylinder misfires in Honda Accord vehicles equipped with the 1.5L turbocharged engine.

NHTSA ODI 11746020

I had a misfire on cylinder three. All vehicle lights came on. Vehicle had spark plugs and fuel injectors replaced. The problem persisted and the next code I received was a turbo burst under pressure code. So turbo and water pump were replaced. This made the problem worse because the new turbo made the head gasket leak. Now after paying $4000 in repairs I have to have the head gasket replaced for another $3000. This is a serious problem with these cars. Wish I never bought this piece of trash. I also replaced all break rotors pads and hoses. Terrible vehicle. Do not buy.

NHTSA ODI 11746022

Dashboard displayed multiple messages and icons/warnings. Steering wheel locked, acceleration was low, barely any power to drive. Engine running rough condition. OBD2 scanner P0302 and P0303 detected. Engine misfire. Honda Dealership diagnosis car. Main concerns include a head gasket blown or crack. Coolant leaking into cylinder 2 and 3. Tie rod cracked. Pressure test low. The vehicle has no prior history of cylinder head removal or head gasket replacement. Vehicle has been properly maintained through consistent oil changes.

NHTSA ODI 11745174

coolant leaks into engine components, causing overheating, loss of power, and contamination of engine oil. Head gasket failed

NHTSA ODI 11745296

Blown head gasket between cylinders 2 and 3 at only 100k miles. Leaking coolant and causing overheating

NHTSA ODI 11744947

Multiple misfires, dealer says blown head gasket after replacing coil and spark plugs. Quoted 6,500. Car still runs is not running hot no exhaust smoking. Told this is common issue after fuel pump was on recall and replaced. After fuel pump replaced car smelled of gas for 3 weeks.

NHTSA ODI 11744957

I have been having issues with my check engine light being on for about 6 months now. Took the car to Honda to get it diagnosed and was told that I needed to get spark plugs, fuel injectors, and ignition coils. Got all of that changed and the issues still remains. Had an outside mechanic take a look and he specializes in Hondas and was told that it is the head gasket, and that would be the only way the issue will get resolved. After taking the car to Honda 2 times and paying for diagnosis with the issue still there. I was getting on the interstate and my car just started stalling, had to immediately pull over before getting hit. I was quoted $3000 to have the head gasket done. This obviously is an ongoing issue with my model Hondas, and I am already out of pocket $1000 with the issue not even being resolved.

NHTSA ODI 11743294

I have owned my Honda Accord for under a year, puchased around 100k miles. My head gasket blew at 118k miles. There was no overheating of the engine or warning lights before hand, my car was idling after work and I turned it on and then I had about 5 different warning lights on. I find out that it was a cylinder 2 misfire and took it to Joyce Koons Honda for them to inform me of a head gasket failure and quoted me for around $7,000.

NHTSA ODI 11742764

Our mechanic, Buttons Auto in [XXX], diagnosed the loss of power, misfiring engine and anti freeze in the head cylnder # 3 with code P0304 and his conclusion was a blown head gasket. We took our car to the dealer, Mansfield Motor Group. Buttons also mentioned there was a pending class action suit against Honda for head gasket failure on our model with the1.5 liter motor. Mansfield Motor Group misdiagnosed the cars issue and charge us $2100 for the repair. A couple days after we got the car back the problems continued. We took it back to the dealer and they then diagnosed the isuue as head gasket failure. We spent another $4600 to fix the headgasket repair A total of $6100 we spent. We did file a claim with Honda, #XXX, which they denied both times. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11742804

I am writing to formally lodge a complaint regarding a recurring issue I have experienced with the head gasket in my vehicle. I have owned several vehicles of this make and model, and I have observed a troubling pattern of blown head gaskets that has not been adequately addressed. Specifically, my current vehicle has suffered from this problem, resulting in significant inconvenience and additional repair costs. This issue appears to be prevalent across this year model as well, suggesting a potential design flaw or manufacturing defect that warrants further investigation. I respectfully someone to look into this matter to determine if a broader safety concern exists that needs to be addressed. Owners of vehicles affected by this issue may be at risk of serious engine damage and costly repairs. Thank you for your attention to this important issue. I look forward to your response.

NHTSA ODI 11742594

Head gasket seal broken, leading to coolant leak into the engine causing misfire

NHTSA ODI 11742005

I have owned a handful of Honda's and never had an issue with them. I own a 2018 Honda Accord Sport and when driving it all the lights on the dashboard lit up. The car left like it was stalling and wouldnt go past 2nd gear. I was almost rear ended by a car and had my 2 granddaughters ages [XXX] and [XXX] in the back seat. I took it to Honda dealership and they said the turbocharger needed replacing as well as a head gasket. My sister inlaw also owns a Honda like mine but hers is a 2021 and the same issue happen to her. It seems like this is an on going problem that Honda needs to address or assist customers with purchasing. It is not safe to continue to keep these cars with these issues on the road. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11741711

Vehicle has only 48,037 miles. Diagnosed with bad cylinders 1 and 2 . Coolant also contaminated cylinders. I took vehicle to Autonation Honda Corpus Christi twice before the diagnosis. Vehicle was running rough. When first turn on engine especially when it is cold, there's a lot of engine shakes. Same as in when on idle. Technician said he could not duplicate problem but did not perform diagnostics. Vehicle was released. New coolant was added because Tech said it was low, brake fluids flushed, new sway bars were installed and wheel alignment performed. After a week, all engine lights came on while driving at 30 mph. Stopped the vehicle and get towed to the dealership. Diagnostics: blown head gasket, bad cylinders and needed new engine. Did a research and these were the Accord problems that were never addressed by Honda. Problems also included Turbos and Fuel injectors.

NHTSA ODI 11741868

Head gasket went bad after only 107,000 miles . A lot of other Honda accord owners have the same problem . Had to get it repaired . This should be a recall . Not safe to drive .

NHTSA ODI 11741436

Turbo Charger is failing. Dealer ran the codes and confirmed. All warning lights are cycling through.

NHTSA ODI 11741325

All of my dash lights are on.

NHTSA ODI 11741402

Car seem to misfire alot , having a lot of head gaskets issues aswell as turbo issues, 10s of 1000s of people like me are experiencing these common problems, taking so much money out of our pockets when its should be handle the correct way

NHTSA ODI 11740790

I am writing to file a formal complaint regarding my 2018 Honda Accord [VIN# [XXX] ] concerning what I believe to be a defective cylinder head or head gasket — an issue I have since learned is widely reported within the Honda owner community and is currently the subject of active class action litigation. Beginning at approximately 89,000 miles, my vehicle began experiencing episodes of engine rumbling followed by sudden shutoff. These episodes occurred two to three times before I brought the vehicle to an authorized Honda dealership at approximately 99,000–105,000 miles for diagnosis. At the dealership, I paid for a diagnostic inspection. I was informed that the technicians could not identify the root cause without performing a full engine pull and internal inspection, which they estimated would cost several thousand dollars — with an additional cost of $5,000–$8,000 if the diagnosis confirmed a cracked cylinder head or failed head gasket. Unable to absorb this expense, I did not authorize the repair. In an effort to keep the vehicle operational, I worked with independent mechanics and took the following corrective measures: replacement of spark plugs and ignition coils, replacement of the electric water pump, regular oil changes, maintenance of proper coolant levels, and avoidance of high or sudden acceleration. These measures allowed me to operate the vehicle for approximately one additional year without a recurrence of the shutoff events. Last summer, the vehicle failed to start entirely and could not be made operable. I was required to have it towed approximately 60 miles to its destination. The vehicle has not been operable since. Upon opening the hood, I observed coolant splashed across the engine cover consistent with a catastrophic head gasket failure. This failure occurred despite the vehicle being well maintained throughout my ownership. I believe this represents a known and systemic defect in Honda engine design for this model year. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11740669

While driving the car it went in to limp mode, restricting the ability to maintain normal driving. It did this because the head gasket needs to replaced because coolant is leaking into # 3 cylinder. My wife and others were put at risk when she had to pull over in an area that was unsafe according to a Summerville police officer who came to her aid and helped her get the car to a safe area.

NHTSA ODI 11740417

I own a 2018 Honda Accord with approximately 108,000 miles. My vehicle has experienced ongoing fuel system and drivability issues connected to the fuel pump recall. It took over two years for Honda to complete the recall repair due to delays and lack of available parts. During that time, my vehicle developed additional issues including failed fuel injectors that required replacement. Even after those repairs, the vehicle continues going into limp mode, causing loss of power and creating a serious safety concern while driving. When I brought the vehicle to Honda for diagnosis, I was charged approximately $180 just to scan the vehicle and then quoted nearly $4,000 in additional repairs. In addition, my vehicle experiences what many Honda owners refer to as the “Christmas lights” issue, where multiple warning lights suddenly illuminate across the dashboard at the same time. This appears to be a widespread complaint among owners of this model and is often associated with ongoing fuel system, electrical, or sensor-related problems. Honda vehicles are marketed as reliable, yet many owners of this model have reported similar problems related to the fuel system, injectors, limp mode, and dashboard warning light failures after the recall issues. I believe the prolonged delay in addressing the recall contributed to further damage to my vehicle. Honda should take responsibility for these known issues and provide assistance to affected customers.

NHTSA ODI 11740478

The head gasket malfunctioned/ broke. It has been confirmed by the Honda dealer where I currently have my vehicle. There were no messages or symptoms prior to failure. My safety and others were put at risk because my vehicle began to turn off as I was driving up a hill with no warning. The vehicle began to decelerate.

NHTSA ODI 11739832

The head gasket was blown on highway even though the car was functioning perfectly fine and was well maintained.

NHTSA ODI 11739192

- the car's automated systems randomly applies severe breaking at improper times - the cars head gasket has blown and in turn has blown the radiator and thermostat

NHTSA ODI 11738708