Honda Grace GM4: Coolant, cooling-system service & fitment
Keep engine and hybrid/power-electronics cooling circuits separate and tied to the exact vehicle evidence.
1verified facts
1fitment references
1service references
0step-by-step guides
Before you buy or service: Cooling systems may be pressurized and hybrid vehicles can have multiple circuits. Follow the manufacturer procedure and never open a hot pressurized system.
Use Honda Ultra e-Coolant 50%; the owner-manual specification is approximately 3.83 L including the 0.44 L reservoir.
The cited specification does not establish the replacement interval here. Follow the applicable Honda maintenance note and confirm drivetrain/production period.
CarFactBook keeps manufacturer evidence, fitment notes and service caveats attached to the exact model code. This page is a reference layer, not proof of the condition or equipment of an individual used vehicle.