general problems of the 2018 Honda Accord - part 1

While driving, my vehicle began shaking/rough running and the check-engine light came on. Multiple warning lights and system warnings appeared on the dashboard, including the brake system, steering, traction control, and tpms warnings. The vehicle experienced noticeable shaking and reduced/abnormal performance. I am concerned that this may be a safety-related defect because multiple vehicle systems are being affected.

I am reporting a safety concern involving my 2018 Honda Accord. I purchased my vehicle used in January 2024 at approximately 90,000 miles and have kept up with the recommended maintenance during my ownership. At approximately 120,000 miles, a Honda dealership diagnosed head-gasket failure with coolant intrusion involving cylinders 3 and 4. Before diagnosis, the vehicle experienced rising engine temperature while idling, coolant loss, jerking during acceleration, numerous warning lights, and severely reduced acceleration. The problem progressed to loss of power and stalling while driving and slowing/stopping, requiring me to place the vehicle in park and restart the engine to continue driving. The vehicle also developed unstable rpms and engine surging while in park. Honda performed a cooling-system pressure test and borescope inspection and confirmed coolant intrusion. Head-gasket replacement cost approximately $5,000. I contacted american Honda (case #16533411), but goodwill assistance was denied because the vehicle is outside warranty and Honda stated it had no Honda-dealership service history. I am reporting this because the head-gasket failure resulted in loss of propulsion and stalling while operating the vehicle, creating a serious safety concern.

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.

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.

At 92,156 miles, my 2018 Honda Accord touring (1. 5l turbo) suffered a catastrophic structural head gasket failure that caused dangerous engine instability while driving. The failure first manifested with a sudden eruption of multiple warning lights across the dashboard while the vehicle was in motion. Following a subsequent startup after a doctor's appointment, the vehicle began shaking violently due to immediate engine misfires. Driving a vehicle that is actively shaking and suffering from cylinder misfires in live traffic creates an unpredictable stall risk and an immediate safety hazard to myself and surrounding motorists. A certified technician at ourisman Honda of woodbridge pressurized the cooling system and physically confirmed that engine coolant is actively leaking directly onto the engine cylinder walls (cylinders 1 and 2) due to a structural head gasket failure. This is a severe design defect that causes unexpected powertrain disruption on public roads.

Major safety issue will lead to loss power and visual hazard for cars on road. 2018 Accord 1. 5 has a coolant leak in cylinder 2 and three via scope verified , shop said it needs a headgasket. It had misfire codes on scanner and shakes when start up. This will be potentially big issue if motor blows up on free way from overheating. Honda corporation won’t do a replacement for the good faith because the car has not been to “Honda” for service.

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.

The contact owns a 2018 Honda Accord. The contact stated that upon starting the vehicle, the engine and tpms warning lights illuminated. The message that the vehicle should not be driven was displayed. The lane assist feature was inoperable. The contact disconnected the battery, and the warning light disappeared. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 55,000.

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.

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.

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.

My 2018 Honda Accord ex's transmission failed after just 88,000 miles. I have owned 3 Hondas and I never had this experience. All bought a Honda world in westminster, California. I did some research and spoke to a private transmission service company, leon's transmissions, and they told me that in 2018, Honda replaced the old transmission they were using with a cvt transmission. They said that clients who bought Honda Accords in 2018 have had the transmission fail on them between 80,000 - 100,000 miles. They also said that Honda knew that the cvt in 2018 was a bad transmission but instead of alerting clients, they "chose" to work on improving the cvt transmission for future vehicles. I have taken in my Honda regularly for service which is about 3 times a year. I just had it serviced on may 29, 2026 with an oil and lube, a new air and cabin filter, and brakes. Two months later, July 7, 2026 I discovered a "shimmy, grunting" sound when I started it. No warning lamps, messages on my dashboard. I took it into my dealership that I have used since 2002. They told me the transmission had failed, that the warranty was only up to 60,000 miles and that to replace it would cost me $9000. 00 dollars. No discounts, no loyalty help, nothing. I am a retired senior and I cannot afford this cost. My dealership said that the car is not safe to drive, but to take it to carmax and see if I can get anything for the car. What nerve. I believe I should be given some compensation or a new transmission for this gross negligence on Honda. I took in my car for regular service, did not put too many miles on the car in the last 8 years (just 88,000) and feel that they should have checked the transmission each time I serviced the car or alerted me via a recall about the transmission early on.

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.

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.

Blown head gasket.

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.

At roughly 83,000 miles, my 2018 Honda Accord 1. 5lt experienced a major engine failure caused by a blown head gasket. At the time of the failure, I was driving on a major road. While accelerating, the vehicle had "bucked" forward, which triggered the engine light to flash at which time the vehicle had no longer responded to me pushing on the gas pedal. This caused a major safety issue as I then had to get off of the road to avoid collisions with other vehicles. I immediately brought the car to a Honda dealership, who confirmed that the head gasket needed to be replaced. There were no prior indications that the vehicle had any issues.

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.

In July 2026, our 2018 Honda Accord required a head gasket replacement. Prior to the diagnosis, the vehicle began experiencing rough starts and engine misfires. While driving, the car suddenly lost power and would not accelerate beyond approximately 10 mph. After returning home and restarting the vehicle, its performance temporarily returned to normal; however, the engine continued to idle roughly. We had the vehicle scanned, and the diagnostic result indicated a misfire in cylinder 3. The vehicle was taken to our local Honda dealership, where we were informed the head gasket failed and needed to be replaced. Given that the vehicle has fewer than 140,000 miles, we do not believe such a major engine repair should be necessary. Over the past 25 years we have owned multiple Honda vehicles, including Accords, civics and cr-vs well over 200,000 miles with our current 2008 Honda cr-v having more than 344,000 miles. None of these vehicles have ever experienced a head gasket failure or similar engine issue. We have never had such a significant costly repair, over $6,000. We are extremely disappointed that our 2018 Accord required such a significant repair at relatively low mileage. We have also learned of allegations in ongoing litigation bissell v american Honda motor CO, involving similar head gasket issues affecting Honda vehicles. Based on our experience and the number of reported complaints, we believe Honda should issue a recall, provide warranty coverage or reimburse affected owners for repair costs whichever benefits the customer. We respectfully request that Honda review our case and consider reimbursement or goodwill assistance for this unexpected and expensive repair.

At approximately 44,000 miles, multiple warning lights illuminated on the dashboard of my 2018 Honda Accord (1. 5l turbocharged engine), including brake system, electric power steering, and driver-assistance/collision-mitigation warnings, accompanied by a rough start and an engine misfire. I took the vehicle to an authorized Honda dealer, which performed a diagnostic scan and a borescope inspection. The dealer confirmed engine coolant leaking internally into cylinder 3, a confirmed cylinder 3 misfire (code p0303), and a low coolant reservoir, and advised that the vehicle was not safe to drive. The diagnostic scan also returned fault codes across multiple safety systems, including abs/vsa stability control, electric power steering, the electric brake booster (low-voltage power circuit fault), and the driver-assistance/collision-mitigation system. This is a head gasket failure allowing coolant to enter the cylinders — a failure mode widely reported on this engine — and it occurred at low mileage, creating a risk of engine misfire, stalling, and loss of power. No crash, fire, or injury has occurred. The dealer's repair order documenting these findings is available on request. I have reported this to the Honda corporate, and they are not responding and stalling the delivery or any update on the case. It has been 3 weeks, and it is causing prolonged inconvience and safety issue to me and my family.

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.

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.

My vehicle started stalling and shaking right before all of the warning lights on my dashboard came on and the safety features stopped working (brake assist, brake hold etc). After checking, the spark plugs were all burnt out so I changed it along with the coil pack and this remedied the issue temporarily until it happened again a few weeks later. This time, I was on the highway going at around 55mph when the car suddenly started stalling and the speed dropped to 10mph. Luckily, I was in the right lane and had no cars behind me because it would've caused an accident. I pulled over to the side of the highway, shut the car off for 15 minutes and then took the nearest exit with my hazard lights on, going at around 10 mph. I took my car to the dealership and they stated that I need a new head gasket which will cost me from $5,000 to $9,000. After doing research, there are hundreds of other Honda's which are experiencing this same issue. Currently, the condition is worsening as the car is shaking abruptly and I am not able to drive over 30mph. I also experienced a burning smell.

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

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.

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.

I own a 208 Honda Accord sport 1. 5l turbo that I purchased new. At approximately 69,000 miles, the vehicle experienced a cylinder head gasket failure, allowing coolant to enter the engine. The vehicle was diagnosed by Honda dealership, which recommended replacing the cylinder head gasket, cylinder head bolts and spark plug at an estimated cost $6,500. Prior to this failure, the vehicle began overheating and warning indicators appeared. The failure resulted in the vehicle becoming unsafe to operate because continued driving could have caused severe engine damage or an unexpected loss of power. The vehicle has been maintained throughout my ownership and I have retained maintenance records. I was also informed by Honda dealership that they have seen multiple 2018 Honda Accords 1. 5l turbo vehicles come in with the same head gasket issue. Based in my experience, I believe this may represent a recurring defect affecting this model.

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.

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.

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

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.

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.

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.

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.

While driving on the highway at approximately 65 mph with my child in the vehicle during rush-hour on may 21, 2026, my 2018 Honda Accord hybrid touring (105,746 miles) suddenly dropped speed, and began backfiring and stopped responding to the gas pedal. The check engine light flashed and the vehicle ran rough. I activated emergency flashers and drove slowly to the shoulder. Sunnyvale Honda (sunnyvale, CA) diagnosed coolant intrusion into one of the cylinders and head gasket failure. The vehicle had never overheated and showed no prior warning signs. All maintenance was performed at Honda dealerships per the maintenance minder schedule. The dealership performed a head gasket repair costing $7,500+ out of pocket. On the first highway drive after pickup, again with my children in the vehicle, the identical failure occurred: backfiring, complete loss of throttle response, vehicle unable to exceed 48 mph with the accelerator fully depressed. The repair did not resolve the defect. The vehicle is currently back at the dealership for further investigation. This failure created an immediate safety hazard on both occasions: sudden loss of speed on highway with no warning. Honda customer service denied goodwill assistance. I am aware of numerous similar complaints involving coolant leak and head gasket failure on 2018-2022 Accord including complaints documenting the same failure on the Accord hybrid 2. 0l engine. Nhtsa should investigate this as a potential safety-related defect affecting multiple Honda engine variants.