BMW i8, I12 (EU)

Automatic transmission fluid capacity & service interval

BMW i8, I12 (EU) models utilize automatic transmission fluid with a capacity of 5,5 liters. The data covers 2 configurations.

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

TypeSpecifications
i8 (2018-2021)
  • Use: Normal
  • Capacity 5,5 liter
  • Code: GA6F21AW (Aisin) 6/1
i8 (2014-2018)
  • Use: Normal
  • Capacity 5,5 liter
  • Code: GA6F21AW (Aisin) 6/1

Additional Notes

  • The BMW i8 (I12) automatic transaxle holds 5.5 liters of fluid, a figure that reflects a full system fill rather than a partial drain-and-refill service quantity.
  • Both the 2014-2018 and 2018-2021 model year configurations share an identical 5.5-liter capacity, indicating no change to the transaxle unit's fluid volume across the production span covered by these specifications.
  • The capacity listed applies under normal use conditions, meaning the 5.5-liter figure is associated with standard operating environments rather than severe-duty or first-change-only service scenarios.
  • The transaxle designation in both configurations reflects the integrated placement of the transmission and axle assembly, a layout common in rear- or mid-engine vehicles where the gearbox and drive axle share a common housing and, consequently, a shared fluid volume.