BMW 7 series, E38 (USA)

Differential fluid capacity & service interval

BMW 7 series, E38 (USA) differential fluid capacity ranges from 1.2 to 1.6 liters. The data covers 4 configurations.

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

TypeSpecifications
  • 740i (1996-2001)
  • Rear
  • Use: Normal
  • Capacity 1,2 liter
  • 740i (1996-2001)
  • Rear, with differential lock
  • Use: Normal
  • Capacity 1,2 liter
  • 740i (1994-1996)
  • Rear
  • Use: Normal
  • Capacity 1,6 liter
  • 740i (1994-1996)
  • Rear, with differential lock
  • Use: Normal
  • Capacity 1,6 liter

Additional Notes

  • The BMW 7 Series E38 (USA) 740i produced from 1994 to 1996 carries a rear differential fluid capacity of 1.6 liters, whether the unit is equipped with a differential lock or not.
  • From 1996 onward, the 740i rear differential capacity drops to 1.2 liters, representing a reduction of 0.4 liters compared to the earlier 1994-1996 specification.
  • The 1.6-liter figure associated with the 1994-1996 740i is a relatively generous fill volume for a rear differential, suggesting a larger or differently designed housing compared to the unit used in later production years.
  • The 1.2-liter capacity on the 1996-2001 740i applies equally to the standard rear differential and to the variant fitted with a differential lock, meaning the locking mechanism does not alter the fluid volume requirement in either generation.
  • All four configurations across both production periods carry a normal use condition designation, meaning the listed capacities and service intervals are not adjusted for severe driving cycles such as towing or sustained high-load operation.

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