BMW X4, F26 (EU)

Transfer case fluid capacity & service interval

The BMW X4, F26 (EU) uses transfer case fluid with a capacity of 0.7 liter for dry fill and 0.6 liter for service fill. The data covers 4 configurations.

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

TypeSpecifications
X4 M40i (2016-2018)
  • Use: Normal
  • Capacity 0,7 liter (Dry fill)
  • Capacity 0,6 liter (Service fill)
  • Code: ATC 45L
X4 xDrive20i (2014-2018)
  • Use: Normal
  • Capacity 0,7 liter (Dry fill)
  • Capacity 0,6 liter (Service fill)
  • Code: ATC 45L
X4 xDrive28i (2014-2018)
  • Use: Normal
  • Capacity 0,7 liter (Dry fill)
  • Capacity 0,6 liter (Service fill)
  • Code: ATC 45L
X4 xDrive35i (2014-2018)
  • Use: Normal
  • Capacity 0,7 liter (Dry fill)
  • Capacity 0,6 liter (Service fill)

Additional Notes

  • The BMW X4 F26 (EU) transfer case carries a dry fill capacity of 0.7 liter across all listed variants, including the X4 M40i, xDrive20i, xDrive28i, and xDrive35i. A dry fill figure applies when the unit is completely empty, such as during a full overhaul or component replacement.
  • The service fill capacity across all four variants is 0.6 liter. A service fill represents the amount of fluid needed when some residual fluid remains in the transfer case after a standard drain, which is the typical condition during a routine fluid change.
  • The 0.1 liter difference between the dry fill and service fill values reflects the small volume of fluid that typically remains in the transfer case passages and housing after draining, meaning a service fill does not fully evacuate the unit.
  • All four variants share identical transfer case fluid capacities for both dry and service fill, despite spanning different engine configurations ranging from the four-cylinder xDrive20i to the performance-oriented M40i. This uniformity suggests a common transfer case unit is used across the F26 lineup.
  • The X4 M40i carries a narrower model year range of 2016-2018 compared to the xDrive20i, xDrive28i, and xDrive35i, all of which span 2014-2018, yet the transfer case fluid specifications remain the same across all of them.
  • All specifications listed are designated for normal use conditions, meaning the stated 0.6 liter service fill and 0.7 liter dry fill values apply under standard operating circumstances rather than severe or heavy-duty driving conditions.

Other Systems