Toyota Prius, W6 (EU)
Coolant capacity & service interval
Toyota Prius, W6 (EU) coolant capacity ranges from 1,6 to 6,1 liters. Service intervals include checks at 30000 km and changes at 90000 km or 150000 km. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Prius 2.0 Plug-in Hybrid (2023- ) |
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| Prius 2.0 Plug-in Hybrid (2023- ) |
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Additional Notes
- The Toyota Prius W6 (EU) 2.0 Plug-in Hybrid, introduced from 2023, carries two separate coolant circuits: a main cooling system with a 6.1-liter capacity and a dedicated inverter cooling system holding 1.6 liters.
- The 6.1-liter figure for the main cooling system represents a full system fill, accounting for the engine, heater core, and associated passages typical of a hybrid powertrain layout.
- The inverter cooling circuit's 1.6-liter capacity is notably smaller, reflecting a self-contained loop designed specifically to regulate the power electronics rather than the combustion engine.
- Both the main cooling system and the inverter cooling system share the same check interval of 30,000 km, regardless of use condition.
- Under normal use conditions, both cooling circuits carry a change interval of 90,000 km.
- A first-change-only condition extends the initial coolant change interval to 150,000 km for both the main cooling system and the inverter circuit, after which the 90,000 km normal interval applies.
- The 150,000 km first-change interval under the first-change-only condition is 60,000 km longer than the 90,000 km interval specified under normal use, indicating a distinction between the factory-fill fluid and subsequent service fills.