
Honda has issued Service Bulletin 25-062 for 2021 Civic Type R vehicles experiencing a 'Misfire No. 4 Cylinder' and diagnostic trouble code P0304. This issue is caused by water entering the hood scoop, leading to corrosion of the ignition coil, plug tube, and spark plug.

Honda Service Bulletin 25-062 details a common issue in the 2021 Honda Civic Type R where water from the hood scoop can lead to corrosion in the No. 4 spark plug hole, causing a misfire and triggering DTC P0304. This bulletin outlines inspection and repair procedures, including potential cylinder…

Honda has issued Service Bulletin 23-039, extending the warranty for A/C compressor shaft seal leaks on certain 2021 Civic models. This issue stems from new refrigerant and oil requirements, which can cause the seal to swell and leak. Owners will be notified and eligible vehicles will receive a…

Honda has issued Service Bulletin 21-014, extending the warranty for the A/C condenser on 2021 Civic Type R vehicles to 10 years/unlimited miles due to potential manufacturing defects causing refrigerant leaks.

American Honda has issued Service Bulletin 23-039, extending the warranty for the A/C compressor shaft seal on 2021 Honda Civic models. This addresses potential leaks caused by new refrigerant and oil requirements, offering a 10-year, unlimited mileage warranty from the original purchase date.

Honda has issued Service Bulletin 23-039, extending the warranty for A/C compressor shaft seal leaks on certain 2021 Civic models. This addresses potential leaks caused by new refrigerant and oil, offering a 10-year warranty from the original purchase date.

Honda is actively collecting parts from select 2021 Civic Type R models experiencing a Malfunction Indicator Light (MIL) with diagnostic trouble codes P0300 (Random Misfire Detected) or P0304 (No. 4 Cylinder Misfire Detected). This initiative aims to understand the root cause of these misfire…

Honda is actively seeking to collect specific parts from 2021 Civic Type R vehicles experiencing a Malfunction Indicator Light (MIL) with diagnostic trouble codes P0300 (Random Misfire Detected) and/or P0304 (No. 4 Cylinder Misfire Detected). This initiative aims to understand the root cause of…

American Honda Motor Co., Inc. is actively seeking specific 2017-2021 Honda Civic Type R vehicles exhibiting a Malfunction Indicator Light (MIL) with DTCs P0300 or P0304. This initiative aims to collect parts to understand the root cause of these misfire conditions.

Honda is investigating engine misfire issues in 2021 Civic Type R models, specifically those with P0300 or P0304 DTCs. The manufacturer is requesting parts from affected vehicles to understand the root cause before repairs are attempted.

Honda has issued Service Bulletin 23-039 to address A/C compressor shaft seal leaks in certain 2016-2021 Civic and Civic Type R vehicles. This issue, caused by new refrigerant and oil, can lead to abnormal seal wear and refrigerant leaks. Honda is extending the warranty for the A/C compressor…

Honda has issued Service Bulletin 23-039 extending the warranty on the A/C compressor shaft seal for certain 2021 Civic models. This addresses potential leaks caused by new refrigerant and oil, which can lead to premature seal wear and refrigerant loss.
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)
No injuries · No fire · No crash
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.
No injuries · No fire · No crash
Entertainment system turns on and off while driving suspected bad alternator.
No injuries · No fire · No crash
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.
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.