Maintenance / 2021 Civic 5Dr · Automatic (AV-S7) · 4 cyl · 1.5 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.
IntervalReplace when Maintenance Minder item 5 is displayed; check the reserve-tank level 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 VerifiedUse the supplied 50/50 mixture without adding straight antifreeze or water; consult a dealer for consistently colder-than -35°C conditions.
- Engine coolant capacity
- 5.2 US qt VerifiedManual change capacity includes 0.58 L already remaining in the reserve tank; not dry fill and not the amount to pour into an empty container.
- 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
- Check only with the engine and radiator cool. Use Honda Type 2 premix; do not add straight coolant concentrate or water. The transmission-specific quoted change capacity includes coolant remaining in the reserve tank and is not a dry-system amount or a guaranteed pour-in quantity.