BMW 8 series Convertible, G14 / F91 (EU)
Automatic transmission fluid capacity & service interval
BMW 8 series Convertible, G14 / F91 (EU) uses automatic transmission fluid with a capacity of 9,35 liters. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 840d xDrive Convertible DPF (235 kW) (2019-2020) |
|
| M850i xDrive Convertible PF (2019- ) |
|
| 840d xDrive Convertible DPF (235 kW) (2018-2019) |
|
| M850i xDrive Convertible PF (2018-2019) |
|
Additional Notes
- Across all listed configurations of the BMW 8 Series Convertible G14 / F91, the automatic transmission fluid capacity is 9.35 liters under normal use conditions.
- A 9.35-liter figure for an automatic transmission is consistent with a full service fill, meaning the volume accounts for fluid retained within the torque converter and valve body in addition to the transmission sump.
- The 840d xDrive Convertible DPF rated at 235 kW carries the same 9.35-liter capacity across both the 2018-2019 and 2019-2020 model year entries, indicating no change in transmission fluid volume between those production periods.
- The M850i xDrive Convertible PF, despite housing a petrol engine rather than the diesel unit found in the 840d, shares the identical 9.35-liter automatic transmission fluid capacity, pointing to the use of the same transmission unit across both powertrains.
- All four rows specify normal use conditions, meaning the listed 9.35-liter capacity applies to standard operating environments rather than severe-duty or first-change-only scenarios.
- The overlap year of 2019 appears in both the 840d xDrive entries as well as both M850i entries, reflecting a mid-cycle production transition rather than a specification change, since the fluid capacity remains unchanged at 9.35 liters throughout.