BMW 8 series Coupé, G15 / F92 (USA)

Automatic transmission fluid capacity & service interval

BMW 8 series Coupé, G15 / F92 (USA) models utilize automatic transmission fluid with a capacity range of 9,28 to 9,35 liters. The data covers 6 configurations.

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

TypeSpecifications
M8 Competition Coupé xDrive (2020- )
  • Use: Normal
  • Capacity 9,35 liter
  • Code: ZF GA8HP76X 8/1
840i Coupé (2019- )
  • Use: Normal
  • Capacity 9,28 liter
  • Code: ZF GA8HP51Z 8/1
840i xDrive Coupé (2019- )
  • Use: Normal
  • Capacity 9,28 liter
  • Code: ZF GA8HP51X 8/1
M8 xDrive Coupé (2019- )
  • Use: Normal
  • Capacity 9,35 liter
  • Code: ZF GA8HP76X 8/1
M850i xDrive Coupé (2019- )
  • Use: Normal
  • Capacity 9,35 liter
  • Code: ZF GA8HP76X 8/1
M850i xDrive Coupé (2018-2019)
  • Use: Normal
  • Capacity 9,35 liter
  • Code: ZF GA8HP76X 8/1

Additional Notes

  • The BMW 8 Series Coupé automatic transmission fluid capacities fall into two distinct values across the lineup: 9.28 liters for the 840i variants and 9.35 liters for the M8, M8 Competition, and M850i xDrive variants.
  • The 9.28-liter capacity applies to both the 840i Coupé and 840i xDrive Coupé, indicating that the addition of xDrive all-wheel drive hardware does not alter the automatic transmission fluid volume in those configurations.
  • The higher 9.35-liter capacity shared by the M8 xDrive Coupé, M8 Competition Coupé xDrive, and M850i xDrive Coupé reflects the larger transmission units paired with higher-output engines in those models.
  • All six configurations carry a normal use condition designation, meaning the listed capacities apply to standard operating environments rather than severe-duty or special-case service scenarios.
  • The M850i xDrive Coupé appears under two separate year entries, 2018-2019 and 2019 onward, both specifying the same 9.35-liter capacity, indicating no change in fluid volume between those production periods.
  • Automatic transmission fluid capacities of this magnitude, in the 9.28-9.35 liter range, are characteristic of a full service fill, which accounts for fluid retained within the torque converter and valve body in addition to the main sump.

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