Reliability report · 2021 Honda Civic · Updated July 2026
2021 is the settled final year of the 10th-generation Civic, and it shows: 133 federal complaints, the quietest year in our Civic data. The 1.5-liter turbo's oil-dilution story is now a background maintenance item rather than a headline, and the 2.0-liter naturally-aspirated engine remains the low-drama choice.
Calm doesn't mean flawless — it means there's no expensive known pattern, so the work is confirming the free recalls were done: the brake-booster campaign (23V-458), the seat-sensor airbag (24V-064), and the fuel-pump mega-recall (23V-858). With those verified and the still-active A/C-condenser extension in your pocket, this is one of the safer used-Civic buys in the run.
Evidence: 133 NHTSA complaints · 4 recall campaigns · 6 mechanic & forum sources
Canary status
Calm
What that means: 133 total federal complaints — the lowest of any Civic year we cover, an eighth of the 2016 launch count. This is the mature, bugs-worked-out final year of the 10th generation; what remains is a handful of free recalls to verify, not an expensive failure pattern.
This status assumes the riskiest common powertrain — see the Civic engine guide.
133
Federal complaints
4
Recalls
$0
Recall inspection/repair
Ranked by the cost of ignoring them. Every claim carries its source.
The 2020–2021 brake recall applies to the 2021 as well: an improperly assembled tie-rod fastener could let the brake master cylinder separate from the booster and cause a loss of braking. Dealers inspect and repair the booster assembly free. It's the one recall on this quiet year with real braking consequences — confirm 23V-458 shows completed by VIN.
What to check
Pink and cleanServiced. Proceed.
Dark brownDamage underway.
Recall inspection/repair
$0
The front-passenger seat weight sensor can crack and short, failing to suppress or risking unintended airbag deployment. Recall 24V-064 (a phased campaign) covers the 2021 Civic hatchback among others, with a free sensor replacement; the later 26V-332 expands the same defect. Confirm by VIN which campaign applies and that it was completed.
$0
Recall sensor replacement
By the final 10th-generation year, the 1.5-liter turbo's oil-dilution reports are minimal in the federal file. The mechanism is unchanged — gasoline can thin the oil on cold-climate short trips — and 2021 is outside the software update and powertrain extension, so a turbo car relies on its maintenance record. A quick cold-dipstick check (gasoline smell, over-full level) is still worth doing. The 2.0-liter engine does not have this issue.
Sources: NHTSA complaint and recall database, 2021 Civic · Independent mechanic channel transcripts (10th-gen Civic) and Honda manufacturer-communication bulletins (A/C-condenser warranty extension)
The A/C condenser can develop factory-defect pinhole leaks. Honda's 10-year/unlimited-mile A/C-condenser extension covers 2016–2021 Civics — a 2021 is covered to roughly 2031, with plenty of runway. Out of pocket the repair runs about $1,800. Test the A/C hard; if weak, invoke the extension by VIN.
Sources: NHTSA complaint and recall database, 2021 Civic · Independent mechanic channel transcripts (10th-gen Civic) and Honda manufacturer-communication bulletins (A/C-condenser warranty extension)
$0
Under the 10-year condenser extension
~$1,800
Out of pocket if denied
The last of the 10th generation, and the numbers finally match the reputation.
Free fixes at any Honda dealer. Run the VIN — “completed” isn’t always completed.