Maintenance / 2021 Civic 4Dr · Automatic (variable gear ratios) · 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 engine coolant at Maintenance Minder item 5. Check the reserve-tank level whenever refueling, with the engine and radiator cool. No fixed replacement distance/time is stated here.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 VerifiedDo not add straight antifreeze or water. For sustained temperatures below -35 C (-31 F), consult a dealer about the required concentration.
- Engine coolant capacity
- 5.4 US qt VerifiedPublished change capacity includes the 0.75 L (0.2 US gal) remaining in the reserve tank; do not interpret it as a top-up or additional amount to pour into an unemptied reservoir.
- 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.