BMW X4, F26 (USA)

Coolant capacity & service interval

BMW X4, F26 (USA) coolant capacity ranges from 7.5 to 9.6 liters depending on configuration. The data covers 7 configurations.

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

TypeSpecifications
  • X4 M40i (2015-2018)
  • As of prod. date 01-07-2018
  • Use: Normal
  • Capacity 9,6 liter
  • X4 M40i (2015-2018)
  • Up to prod. date 30-06-2018
  • Use: Normal
  • Capacity 9,6 liter
  • X4 xDrive28i (2015-2018)
  • As of prod. date 01-07-2018
  • Use: Normal
  • Capacity 7,5 liter
  • X4 xDrive28i (2015-2018)
  • Up to prod. date 30-06-2018
  • Use: Normal
  • Capacity 7,5 liter
X4 xDrive28i (2014-2015)
  • Use: Normal
  • Capacity 7,5 liter
  • X4 xDrive35i (2014-2015)
  • As of prod. date 01-07-2018
  • Use: Normal
  • Capacity 9,6 liter
  • X4 xDrive35i (2014-2015)
  • Up to prod. date 30-06-2018
  • Use: Normal
  • Capacity 9,6 liter

Additional Notes

  • The BMW X4 F26 coolant system capacity splits clearly along engine lines, with the xDrive28i rated at 7.5 liters and both the xDrive35i and M40i rated at 9.6 liters, reflecting the larger thermal load of the six-cylinder engines in the latter two variants.
  • A 9.6-liter cooling system capacity is a full-system service fill figure, meaning the volume accounts for the entire circuit including the engine block, radiator, expansion tank, and associated hoses rather than a partial drain-and-refill quantity.
  • The xDrive28i carries the same 7.5-liter capacity across both the 2014-2015 and 2015-2018 production spans, indicating no change in cooling system volume between those two specification entries despite the different production date notations.
  • The xDrive35i and M40i share an identical 9.6-liter capacity, which places both six-cylinder variants in the same service fill category regardless of the performance difference between the standard and M Performance tuning.
  • Several variants carry dual specification entries distinguished by production date cutoffs of 30-06-2018 and 01-07-2018. Both entries within each variant list the same capacity, meaning the production date notation in those rows does not correspond to a change in coolant volume.
  • The xDrive35i specifications are listed only for the 2014-2015 model years, while the xDrive28i and M40i each have entries extending into the 2015-2018 range, reflecting different production spans across the F26 lineup.
  • All coolant capacity figures across the BMW X4 F26 are listed under normal use conditions, with no separate severe-use interval or capacity variant present in the specifications for any of the covered variants.

Other Systems