BMW X3, F25 (EU)

Manual transmission fluid capacity & service interval

BMW X3, F25 (EU) models require manual transmission fluid with a capacity of 1,2 liters. The data covers 5 configurations.

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

Type	Specifications
X3 sDrive18d (2014-2017)	Use: Normal Capacity 1,2 liter Code: ZF GS6-45BZ/DZ 6/1
X3 xDrive20d (2014-2017)	Use: Normal Capacity 1,2 liter Code: ZF GS6-45BZ/DZ 6/1
X3 sDrive18d (2012-2014)	Use: Normal Capacity 1,2 liter Code: ZF GS6-45BZ/DZ 6/1
X3 xDrive20i (2011-2017)	Use: Normal Capacity 1,2 liter Code: ZF GS6-45BZ/DZ 6/1
X3 xDrive20d (2010-2014)	Use: Normal Capacity 1,2 liter Code: ZF GS6-45BZ/DZ 6/1

Across all listed configurations of the BMW X3 F25 (EU), the manual transmission fluid capacity is 1.2 liters, a figure consistent with a service fill rather than a full overhaul or dry-fill volume, which would typically be higher.
The 1.2-liter capacity applies uniformly under normal use conditions across every variant in the specifications, meaning the figure reflects standard operating service rather than a severe-duty or first-change scenario.
The sDrive18d variant carries the 1.2-liter manual transmission fluid capacity across two consecutive production periods, 2012-2014 and 2014-2017, with no variation in the specified amount between those periods.
The xDrive20d similarly spans two production periods, 2010-2014 and 2014-2017, and maintains the same 1.2-liter capacity across both, indicating no change in transmission fluid volume despite the generational split in the specification records.
The xDrive20i, covering 2011-2017 as a single continuous entry, shares the same 1.2-liter capacity as the diesel variants, suggesting a common manual gearbox unit or at least a shared fluid volume specification across petrol and diesel drivetrains in the F25 lineup.
A 1.2-liter service fill is a relatively modest volume, characteristic of compact manual gearboxes where the sump capacity is limited by the physical dimensions of the transmission housing rather than by the number of gear sets serviced.