2021 Honda Civic Service and Repair Manual

This factory service and repair manual for the 2021 Honda Civic is built around the exact engine, trim and model-year combination you own, covering the L15B7, K20C2, L15BA and K20C1 engine codes stamped on Civic powerplants that year, so the specs and procedures inside are the ones Honda actually released for your car, not an approximation pulled from a nearby year.

Engines covered

• 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline
• 2.0L inline-four (122 cu in) — DOHC, naturally aspirated, gasoline
• 1.5L inline-four — DOHC, turbocharged, gasoline

Body styles covered

• 4-door hatchback
• 4-door sedan

Trims covered

• EX
• EX-L
• i-Style
• LX
• Sport
• Sport Touring
• Touring
• Type R
• Type R Limited Edition

Known issues on the 2021 Civic. Four recalls are on federal record for this model year. The first covers a tie rod fastener joining the brake booster to the brake master cylinder that may have been improperly assembled, letting the master cylinder separate from the booster and causing a loss of brake function. The second covers the front passenger seat weight sensor, which can crack and short circuit and fail to suppress the air bag as intended, risking an unintended deployment. The third covers the in-tank fuel pump, which may fail and stall the engine while driving. The fourth, issued under a separate campaign, again covers the front passenger seat weight sensor cracking and short-circuiting in a way that can trigger unintentional air bag deployment. Owners have filed 140 complaints for the year. The factory diagnostic and repair procedures behind each of those systems are here.

From a brake booster inspection to a fuel pump swap or a seat sensor check, it keeps you on the OEM procedure and the correct specification for your specific 2021 Civic.