BMW Z4 Roadster, E85 (EU)

Automatic transmission fluid capacity & service interval

BMW Z4 Roadster, E85 (EU) uses automatic transmission fluid with a capacity range of 8,9 to 9,5 liters. The data covers 6 configurations.

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

TypeSpecifications
Z4 2.5i (2006-2008)
  • Use: Normal
  • Capacity 9-9,5 liter
  • Code: ZF 6HP19 6/1
Z4 2.5si (2006-2008)
  • Use: Normal
  • Capacity 9-9,5 liter
  • Code: ZF 6HP19 6/1
Z4 3.0si (2004-2008)
  • Use: Normal
  • Capacity 9-9,5 liter
  • Code: ZF 6HP19 6/1
Z4 2.2i (2002-2006)
  • Use: Normal
  • Capacity 8,9 liter
  • Code: ZF 5HP19 (A5S325Z) 5/1
Z4 2.5i (2002-2006)
  • Use: Normal
  • Capacity 8,9 liter
  • Code: ZF 5HP19 (A5S325Z) 5/1
Z4 3.0i (2002-2006)
  • Use: Normal
  • Capacity 8,9 liter
  • Code: ZF 5HP19 (A5S325Z) 5/1

Additional Notes

  • The BMW Z4 Roadster E85 automatic transmission fluid capacity falls into two distinct values across the model range: 8.9 liters for earlier configurations and a range of 9 to 9.5 liters for later ones.
  • The 8.9-liter capacity applies to the Z4 2.2i, Z4 2.5i, and Z4 3.0i variants produced between 2002 and 2006, indicating a shared transmission unit across those three engine displacements during that period.
  • The 9 to 9.5-liter capacity range, rather than a fixed single value, reflects a service fill tolerance common in automatic transmissions where the final accepted level depends on fluid temperature and the drain-and-fill method used during servicing.
  • The Z4 2.5i saw a capacity increase from 8.9 liters to the 9 to 9.5-liter range when the 2006-2008 production period began, coinciding with the introduction of the Z4 2.5si as a separate variant also carrying the higher capacity figure.
  • The Z4 3.0si, spanning 2004-2008, carries the 9 to 9.5-liter specification, while the earlier Z4 3.0i covering 2002-2006 retains the lower 8.9-liter figure, showing a capacity difference between the two 3.0-liter variants despite their shared displacement.
  • All six configurations listed carry a normal use condition, meaning the stated capacities apply to standard operating environments rather than severe-duty cycles such as frequent towing or extreme temperature exposure.

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