BMW 8 series, E31 (EU)

Power steering fluid capacity & service interval

BMW 8 series, E31 (EU) uses power steering fluid with a capacity of 2.4 liters. The data covers 3 configurations.

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

TypeSpecifications
  • 840Ci (1995-1999)
  • System, power steering/brake booster/levelling
  • Use: Normal
  • Capacity 2,4 liter
  • 850Ci (1994-1999)
  • System, power steering/brake booster/levelling
  • Use: Normal
  • Capacity 2,4 liter
  • 850CSi (1994-1997)
  • System, power steering/brake booster/levelling
  • Use: Normal
  • Capacity 2,4 liter

Additional Notes

  • All three variants listed — the 840Ci, 850CSi, and 850Ci — share an identical hydraulic system capacity of 2.4 liters.
  • The 2.4-liter figure represents the total fluid volume for a combined hydraulic circuit that serves power steering, the brake booster, and the self-leveling suspension simultaneously, rather than a dedicated power steering reservoir alone.
  • A shared hydraulic circuit of 2.4 liters across three distinct engine variants indicates a common platform architecture for the E31's hydraulic system, regardless of the drivetrain fitted.
  • The BMW 8 Series E31 (EU) 840Ci carries a model year range of 1995-1999 within the specifications, making it the latest-starting variant among the three listed.
  • The 850CSi covers model years 1994-1997, giving it the narrowest production window of the three variants in the specifications.
  • All capacity values are listed under normal use conditions, meaning the 2.4-liter figure applies to standard operating environments rather than severe-duty or first-change scenarios.

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