Maintenance / 2021 Civic 5Dr · Manual 6-speed · 4 cyl · 2.0 L · Turbo

Engine coolant

Check the reservoir level with the engine cold and investigate repeated coolant loss. Coolant type and replacement procedure matter as much as capacity.

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IntervalReplace at Maintenance Minder item 5; check the reserve tank at each refueling.Verified

01 / Requirements

Configuration-specific service and fitment facts

These sourced values are shared by the specification sheet and the maintenance guides for this exact configuration.

Coolant specification: Honda Long Life Antifreeze/Coolant Type 2, premixed 50/50 Verified

Cooling-system precautions: Never open a hot pressurized cooling system. A total-system capacity is not necessarily the amount that drains during a routine change; follow the engine-specific bleeding procedure.
Service requirements: Use Honda Type 2 premix and inspect only when cold. The 2.0 L table prints 1.26 US gal (4.64 L), including 0.20 US gal (0.75 L) remaining in the reserve tank. The gallon/litre pair is inconsistent; a verified numeric service quantity is withheld until clarified. Do not choose a fill amount by converting or borrowing the 1.5 L table.