Toyota Prius, W3 (EU)

Additional Notes

• The Toyota Prius W3 (EU) carries two separate cooling circuits: one serving the combustion engine and one serving the electric drive system, each with its own capacity and service interval specifications.
• The combustion engine cooling system on the Prius W3 (2009-2011 and 2012-2016) holds either 6.5 liters or 7.2 liters depending on whether the exhaust recirculation system is fitted, making equipment level a direct factor in the correct service fill volume.
• The Prius Plug-in Hybrid W3 (2012-2016) combustion engine cooling system specifies a fixed 7.2-liter capacity with no variant figure, unlike the standard Prius W3 which lists two capacity values tied to equipment.
• The electric drive cooling system across all W3 configurations holds 2.1 liters, a notably smaller volume that reflects the more compact thermal management circuit associated with the hybrid drive components rather than a combustion engine.
• All configurations specify a coolant check interval of 30000 km regardless of cooling circuit or use condition, while change intervals vary considerably depending on whether the service is a first change or a subsequent normal-schedule change.
• Under normal use conditions, the combustion engine cooling system change interval is 90000 km across all W3 variants, while the first change only condition extends that initial interval to 150000 km, indicating a longer-life fill used at the factory or at the first service.
• The electric drive cooling system under normal use conditions specifies a 90000 km change interval, but under the first change only condition, the interval extends to 240000 km, a substantially longer figure than the equivalent first-change interval on the combustion engine circuit.
• The 240000 km first-change interval on the electric drive cooling system applies identically to the standard Prius W3 across both the 2009-2011 and 2012-2016 model year ranges, as well as to the Prius Plug-in Hybrid W3 2012-2016.