2021 Honda Civic Engine for Sale — Naturally Aspirated & Type R
We currently have 8 used 2021 Honda Civic engines for sale in grade A condition, with mileage ranging from 5,084 to 63,415 miles and prices starting at $1,734. Every unit ships free to commercial addresses anywhere in the USA and is backed by our 4-year / 40,000-mile warranty — the strongest coverage available on used auto parts, included at no extra cost.
About the 2021 Honda Civic Engine
The 2021 Honda Civic is the final model year of the 10th generation platform (2016–2021), and it arrives with four distinct engine configurations covering everything from a fuel-efficient daily driver to a 306-horsepower front-wheel-drive performance machine. Understanding which engine your specific 2021 Civic uses is critical before ordering a replacement — the differences between configurations are significant and not interchangeable.
Why Is 2021 Honda Civic Engine Replacement Demand High?
The 2021 Civic's most requested replacement engine is the 1.5L Turbo L15B7, and the primary reason is a well-documented oil dilution problem that affects 2019–2022 Civic models with this engine. The 2021 model year falls under an active class action lawsuit alleging that Honda was aware of the defect before production and failed to issue a proper recall.
Real-world oil analysis reports from 2021 Civic owners using full-synthetic oil show fuel dilution levels exceeding 5% after 8,000-mile intervals in cold-climate driving — well above the 2–3% threshold considered acceptable. The practical implication is that 2021 Civic L15B7 owners in cold-weather states who use their vehicle primarily for short trips are at statistically elevated risk of premature engine wear, making used low-mileage replacement engines from warmer climates an attractive solution.
Additional known issues on the L15B7 include carbon buildup on intake valves (a consequence of direct injection bypassing the intake valves with fuel wash), spark plug fouling requiring replacement every 25,000–30,000 miles rather than the typical 60,000-mile interval, and occasional head gasket failure in high-boost driving conditions. None of these issues affect the K20C2 base engine, which uses port injection and does not experience fuel dilution.
Why Buy Your 2021 Honda Civic Engine from Moon Auto Parts?
Every used 2021 Honda Civic engine in our inventory is sourced from our network of 5,000+ vetted salvage yards and certified auto recyclers across the United States. Each unit is mileage-verified against donor vehicle records, compression-tested, and graded before listing. We only stock Grade A engines — any unit that does not pass our inspection is rejected, not sold.
Your 2021 Civic engine ships free to any commercial address in the USA and is covered by our 4-year / 40,000-mile warranty, significantly stronger than the industry standard 3-year coverage. Our certified technicians are available Monday through Friday, 9 AM to 7 PM CST, at (888) 777-0769 to help confirm the correct engine code for your VIN before purchase.
