2021 Honda Accord — Known Issues & Recalls

Your car suddenly developed a severe misfire in cylinder 2, causing rough idling, multiple warning lights including a flashing check engine light, and loss of power while driving — forcing you to coast to safety. A mechanic initially replaced the coil and spark plug, but the problem returned. The dealership diagnosed a faulty head gasket between cylinder 2 and the water jacket, quoting $5,998 for repairs. The fix will require removing the cylinder head and replacing the faulty head gasket.

Your car's warning lights all came on and it wouldn't accelerate properly. The dealership diagnosed a blown head gasket, which they said is a known issue affecting 1.5-liter turbocharged Honda vehicles. You also mentioned two additional known problems with these cars that Honda hasn't addressed. Fixing a blown head gasket typically requires removing the engine head and replacing the gasket seal.

When you start your car in cold weather, you immediately notice rough, shaky engine operation along with a flashing check engine light. You've also noticed some coolant loss and white smoke coming from the engine. A diagnostic scan revealed a cylinder #2 misfire code, which means that cylinder isn't firing properly. This will likely require spark plug replacement, ignition coil inspection, or fuel injector service to restore proper engine operation.

Your head gasket failed at 100,000 miles while you were driving on the highway, causing your car to lose power and slow down from 65 mph to 35 mph. A blown head gasket allows coolant and oil to leak internally, reducing engine performance and potentially causing overheating. The repair will require removing the cylinder head and replacing the gasket, along with checking for any additional engine damage.

Your engine's timing chain has stretched and required replacement at 86,000 miles, costing $2,400. This is reported to be a common issue in 1.5T engines. The timing chain controls the synchronization of your engine's internal components, and when it stretches, it can cause the engine to run poorly or fail entirely.

Your infotainment screen is registering phantom touches 4 out of 5 times you drive, randomly opening menus, changing settings, or switching radio stations without you touching it. When using the navigation app, these ghost touches redirect your map away from your route, forcing you to repeatedly tap the recenter button—and sometimes the screen won't respond to your actual touches, keeping your attention off the road during critical moments. The manufacturer's only solution is a system restart (which doesn't work) or a full screen replacement (often not covered by warranty), leaving you forced to use your phone by hand instead, which creates a distracted driving hazard.

Water leaked into your tail light assembly, causing electrical shorts that triggered multiple warning lights including brake system, ABS, VSA, and Honda Sensing alerts. Your car also lost power and went into a reduced-power "limp mode," making it dangerous to drive. The dealership replaced the entire tail light assembly for over $800, which resolved all the warnings and performance issues.

Your car is experiencing a rough idle when starting, and you're seeing multiple check engine codes on the dashboard. After paying $3,000 for a fuel injector replacement, the problem returned within days, and the dealership said they couldn't find anything wrong without an active error code. Over the following weeks, you've noticed the rough idle continues regularly and your fuel efficiency has dropped by about 6 miles per gallon.

Your engine's head gasket has failed, which is a seal that keeps oil and coolant from leaking into the combustion chamber. You may notice coolant leaks, overheating, or white smoke from the exhaust. The dealership has confirmed this is a known issue with your vehicle generation, but without an official recall, they're charging the full repair cost of approximately $7,000 to replace the head gasket and related components.

While driving on the highway with four children in the car, your dashboard warning lights came on and white smoke appeared from the tailpipe. Your check engine light blinked rapidly, indicating a misfire in cylinder 4 caused by a failing head gasket—at only 81,000 miles. The situation was dangerous as you had to merge lanes suddenly to safety. Honda has quoted nearly $4,400 to repair the head gasket, and you've found that Honda is aware of premature head gasket failures in 1.5L engines but hasn't addressed the issue. The repair will likely involve removing the cylinder head and replacing the failed gasket.

After having your CVT transmission serviced at a dealership, your car began making unusual noises, vibrating, and driving harshly. A second dealership found that the transmission fluid was overfilled during the service, which caused internal transmission damage. Your transmission likely needs to be replaced, which could cost over $10,000, and the original dealership has refused to help cover the cost.

While driving at highway speeds (50-70 mph), your car randomly loses the ability to accelerate, forcing you to lift off the gas pedal and restart. In a second incident, you lost all acceleration ability entirely—nearly all dashboard warning lights came on (power steering, emissions, powertrain problems), the car wouldn't move except in EV mode at very low speeds, creating a serious safety hazard in traffic. The issue appears to be related to the electrical, speed control, or braking systems, and may require diagnostic testing or component replacement to identify why the engine is losing power.

Your car's automatic braking system is randomly activating and applying the brakes without any vehicles or obstacles nearby, causing the brake warning light to flash on your dashboard. This happens frequently at unpredictable times, even on highways, and you cannot stop it once it starts. The issue removes your control over the braking system and creates a safety hazard. The fix will likely involve diagnosing the forward collision sensor system and potentially recalibrating or replacing the automatic emergency braking components.

Your Accord has had ongoing electrical problems since you bought it, causing intermittent issues with buttons, lights, and safety features that sometimes activate on their own—including the automated braking system. You've experienced head injuries from unexpected brake engagement, and the vehicle's false danger alerts contributed to an accident. The electrical malfunctions appear briefly on the screen before occurring.

Your car's Body Control Module has failed, which has disabled all of your advanced safety features like forward collision avoidance, along with other key car functions. This is a critical electrical system failure that affects multiple vehicle systems at once. The fix will likely require replacement or reprogramming of the Body Control Module by a dealer.

Your 2021 Honda Accord's engine is losing coolant rapidly — you need to refill it every two weeks. You've already had the head gasket and cylinder head repaired at a Honda dealership, but the coolant loss continues. The dealership is still investigating the issue, but this could lead to engine overheating, which is a serious safety risk. The repair will likely involve diagnosing and fixing the cooling system, possibly including another head gasket replacement or engine work.

Your car's fuel pressure dropped unexpectedly, causing the engine to stall and stop running. This could happen while driving or at a stop, leaving you stranded until the engine restarts or is restarted manually. The issue likely involves the fuel pump, fuel pressure regulator, or fuel filter not maintaining proper pressure to the engine.

Your 2021 Honda Accord started shaking and struggling to accelerate around 78,000 miles, with warning lights on the dashboard. A mechanic found a misfire in cylinder 3 and replaced the spark plug and ignition coil, but the same shaking and power loss returned shortly after. You're concerned this could cause a safety risk when merging on highways, and you've found similar complaints from other owners online. The issue may require engine diagnostics, potential spark plug and ignition coil replacement again, or further inspection for internal engine problems like a head gasket failure.

Your car's automatic braking system (accident mitigation braking) is activating unexpectedly when you drive under bridges in your town, causing sudden braking due to dark shadows on the road. This creates a safety hazard because other drivers around you may not have time to stop, and you nearly caused an accident when another vehicle almost hit you after your brakes engaged. The system is designed to prevent collisions with actual vehicles, but it's mistakenly reacting to shadows instead. Honda is requesting a diagnostic fee of several hundred dollars to investigate the issue.

Your car was difficult to start, and once it did start, all the warning lights came on. You got a trouble code P0087 (which relates to fuel pressure), and the car kept stalling when you tried to drive it in the parking lot. This happened after your car sat all day, even though it ran fine earlier.