Subaru Solterra (USA / CAN)

Coolant capacity & service interval

The Subaru Solterra (USA / CAN) uses coolant with capacities of 4 liter and 7.4 liter depending on the configuration. Two configurations are covered in the data.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • Solterra (160 kW) AWD (2022- )
  • Inverter
  • Use: Normal
  • Capacity 7,4 liter
  • Solterra (160 kW) AWD (2022- )
  • Heater
  • Use: Normal
  • Capacity 4 liter

Additional Notes

  • The Subaru Solterra (160 kW) AWD carries two separate coolant circuits, each with its own capacity figure, reflecting the thermal management architecture common in battery electric vehicles where drive electronics and cabin heating are handled independently.
  • The inverter cooling system holds 7.4 liters, a notably larger volume than the heater circuit, consistent with the higher heat rejection demands placed on power electronics during traction motor operation.
  • The heater cooling circuit carries 4 liters, a capacity typical of a dedicated thermal loop serving the cabin heating function rather than high-load power electronics.
  • Both the inverter and heater cooling systems on the 160 kW AWD configuration are specified under normal use conditions, meaning the listed capacities apply to standard operating environments without a separate severe-duty interval distinction.
  • The combined coolant volume across both circuits totals 11.4 liters, which is a meaningful figure when planning a full-system service, since each circuit requires individual attention rather than a single drain-and-fill procedure.

Other Systems