BMW Z4 Roadster, E85 (EU)
Coolant capacity & service interval
BMW Z4 Roadster, E85 (EU) coolant capacity ranges from 8,3 to 8,8 liters. The service interval for coolant is 48 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Z4 2.0i (2004-2008) |
|
| Z4 2.2i (2002-2006) |
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| Z4 2.5i (2002-2006) |
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| Z4 3.0i (2002-2006) |
|
Additional Notes
- The Z4 2.2i (2002-2006) with a manual transmission carries a cooling system capacity of 8.3 liters, while pairing the same engine with an automatic transmission raises that figure to 8.8 liters. The additional 0.5 liters accounts for the coolant routed through the transmission oil cooler circuit integrated into the cooling system.
- The Z4 2.5i and Z4 3.0i, both covering the 2002-2006 model years, share an identical cooling system capacity of 8.3 liters, matching the manual-transmission figure of the 2.2i from the same period.
- All four configurations across the BMW Z4 Roadster E85 (EU) range carry a coolant change interval of 48 months under normal use conditions, meaning standard driving without the elevated thermal stress associated with severe-use classifications.
- The Z4 2.0i (2004-2006) specifications do not state a fixed coolant capacity in liters. Instead, the fill level is defined as between the minimum and maximum marks on the expansion tank, indicating a top-up or level-check procedure rather than a full system drain and refill with a measured volume.
- The absence of a fixed liter value for the Z4 2.0i cooling system contrasts with the explicit capacities listed for the 2.2i, 2.5i, and 3.0i variants, suggesting a different service approach is applied to the 2.0i engine configuration.