BMW 6 series, E63 / E64 (USA)

Differential fluid capacity & service interval

BMW 6 series, E63 / E64 (USA) uses differential fluid with a capacity of 1.4 liters. The data covers 2 configurations.

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

TypeSpecifications
  • 650i (2005-2011)
  • Rear
  • Use: Normal
  • Capacity 1,4 liter
  • Code: 215K
  • 645Ci (2003-2005)
  • Rear
  • Use: Normal
  • Capacity 1,4 liter
  • Code: 215K

Additional Notes

  • The BMW 6 Series E63/E64 rear differential holds 1.4 liters of fluid across both the 645Ci and 650i configurations, a capacity figure that reflects a service fill level rather than a full overhaul or dry-fill volume.
  • The 645Ci, covering model years 2003-2005, shares an identical 1.4-liter rear differential capacity with the 650i, which spans 2005-2011, indicating a consistent differential housing specification between the two engine variants despite differing powerplants.
  • Both configurations list the use condition as normal, meaning the 1.4-liter capacity figure applies to standard operating and service conditions rather than severe-duty or first-change-only intervals.

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