2021 Honda Civic Type R

I recently discovered that coolant has been leaking into two of my cylinders, causing an overheating issue. The Honda dealership tells me this is a known issue for their engines for that year range, so much so that an extended warranty has been added to all other engines but there is a carve out for the Type-R. The same damage is occurring and they know about it but they are failing to address it. I am a lawyer and I will also be working on putting together other owners to certify a class if this route is not successful. I first became aware of it based on a rev match error and an emissions system error being thrown at the same time, and then the engine started to overheat when it was started from cold. I could get the engine temperature to come down by manually engaging the air conditioning. This was some type of cooling system error as well, but I didn't see that on the checklist above. The dealership has confirmed the error and reproduced it. It is currently still at the dealer and is available for inspection.

NHTSA ID

11774237

Incident

Oct 19, 2026

Head Gasket failure, coolant was found while inspecting a spark plug at my local Honda dealership. Noticed spark plug in cylinder 2 was damaged. Stuck a camera down to find coolant mixed with oil.

NHTSA ID

11763354

Incident

Mar 20, 2026

While operating my 2021 Honda Civic Type R (VIN: [XXX] ) in high-ambient temperatures (approximately 95°F), the vehicle experienced a sudden and total loss of motive power during acceleration while exiting a busy intersection. This resulted in an immediate engine stall in the path of oncoming traffic, creating a severe risk of a collision. Following the stall, the vehicle was extremely difficult to restart. Once restarted, it entered a 'limp home' mode with a severely restricted RPM limit and multiple dashboard warnings, including 'Emissions System Problem' and 'Rev Match System Problem.' A diagnostic scan performed immediately after the incident revealed a DTC P0087 (Fuel Rail/System Pressure - Too Low). The symptoms—thermal-related failure, stalling under load, and the P0087 code—are identical to the documented mechanical failures of the Denso fuel pump impeller swelling defect. Although this production year and model are known to be part of the expanded fuel pump recall population, my specific VIN is not currently showing as 'remedied' or 'open' in the manufacturer's database. I am reporting this as an active, unaddressed safety defect that poses an unreasonable risk of crash or injury due to unpredictable engine failure in traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11727070

Incident

Mar 21, 2026

Misfire in cylinder 4 led to head gasket failure. The problem was diagnosed at the dealership, and there is an active TSB for this issue - however my vehicle is not covered.

NHTSA ID

11702971

Incident

Nov 24, 2025

Entertainment system turns on and off while driving suspected bad alternator.

NHTSA ID

11700828

Incident

Nov 21, 2025

The contact owns a 2021 Honda Civic Type-R. The contact stated that the vehicle in front came to a stop, and the contact did not have ample time to bring the vehicle to a stop. As a result, the contact crashed the front of the vehicle into the rear of the vehicle in front. None of the air bags deployed. The vehicle was not deemed a total loss. The vehicle was driven back to the contact's residence and then taken to an independent service center, where it remained for further investigation. The vehicle was not repaired due to costs. It was unknown if the failure was related to NHTSA Campaign Number: 24V064000 (Air Bags), which was associated with the VIN. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 48,000.

NHTSA ID

11638340

Incident

Jan 13, 2025

Mileage

48,000 mi

The contact owned a 2021 Honda Civic Type R. The contact stated that while driving at approximately 35 mph, the vehicle suddenly lost automotive power and stalled. The vehicle was towed to the local dealer who diagnosed that the transmission was faulty and needed to be replaced. The transmission was replaced and the failure was remedied. Later, while driving and making a left turn the steering wheel remained stuck in the left direction and the contact was unable to veer to the right direction causing the vehicle to crash into a tree and then catch on fire immediately. During the crash, the vehicle was destroyed and later towed away. The contact sustained a fractured right ankle and was transported to the hospital. The contact required surgeries, 16 bolts, and a plate where he was placed in bed rest for 2 years. A police report was filed. The cause of the failure was not determined. The manufacturer was notified of the failures. The failure mileage was 4,000.

NHTSA ID

11623703

Incident

Nov 1, 2021

Mileage

4,000 mi

See attached document for complaint.

NHTSA ID

11616570

Incident

Aug 9, 2024

Service Bulletin - Water could enter the hood scoop and accumulate down inside the no. 4 spark plug hole. This can corrode the ignition coil, plug tube, and spark plug, leading to a misfire to the no. 4 cylinder. If a misfire is detected, DTC P0304 is stored.

Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.

Service Bulletin - Water could enter the hood scoop and accumulate down inside the no. 4 spark plug hole. This can corrode the ignition coil, plug tube, and spark plug, leading to a misfire to the no. 4 cylinder. If a misfire is detected, DTC P0304 is stored.

Service Bulletin - Due to a new North America regulation which introduces a new refrigerant and oil requirement, the compressor shaft seal may leak. American Honda is extending the warranty on the A/C compressor shaft seal from the original 3 years to 10 years from the original date of purchase, with no mileage limitation. The new refrigerant and oil may cause swelling of the compressor shaft seal. The swelling may lead to abnormal wearing of the seal which may increase seal gaps around the compressor shaft allowing refrigerant to leak out.

Service Bulletin - American Honda is extending the warranty on the A/C condenser to 10 years from the original date of purchase with unlimited miles. This warranty extension only covers vehicles that have a defective A/C condenser from the factory. The A/C condenser was not manufactured to specification. As a result, corrosion may develop in the form of tiny holes in the condenser tube walls that allow the refrigerant to leak out.

Service Bulletin - Due to a new North America regulation which introduces a new refrigerant and oil requirement, the compressor shaft seal may leak. American Honda is extending the warranty on the A/C compressor shaft seal from the original 3 years to 10 years from the original date of purchase, with no mileage limitation. The new refrigerant and oil may cause swelling of the compressor shaft seal. The swelling may lead to abnormal wearing of the seal which may increase seal gaps around the compressor shaft allowing refrigerant to leak out.