Subaru Solterra (EU)
Coolant capacity & service interval
Subaru Solterra (EU) coolant capacity ranges from 4 to 7,4 liters. Service intervals include checks every 30000 km or 24 months, and changes at 80000 km or 200000 km. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
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Additional Notes
- The Subaru Solterra (EU) 160 kW AWD, introduced in 2022, carries two separate coolant circuits: one serving the inverter and one serving the heater system, each with its own capacity and service schedule.
- The inverter cooling circuit holds 7.4 liters, a notably larger volume than the heater circuit, reflecting the thermal management demands placed on high-voltage power electronics in an electric drivetrain.
- The heater cooling circuit holds 4 liters, a capacity more typical of a compact auxiliary loop dedicated to cabin heating rather than high-load component cooling.
- Both circuits share the same inspection interval of every 30,000 km or 24 months, whichever comes first, regardless of which circuit is being serviced.
- Under normal use conditions, both the inverter and heater cooling circuits are scheduled for a fluid change at 80,000 km.
- A first-change-only interval of 200,000 km is specified for both circuits, meaning the initial factory-fill fluid in each circuit is rated to last significantly longer before the first replacement than subsequent fills under normal use intervals.