BMW 1 series, E82 (USA)

Power steering fluid capacity & service interval

BMW 1 series, E82 (USA) uses power steering fluid with a capacity range between min and max. The data covers 5 configurations.

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

TypeSpecifications
  • M CoupĂ© (2011-2013)
  • Separate system (ATF cap)
  • Use: Normal
  • Between min and max.
  • 135i, N55 (2010-2013)
  • Separate system (ATF cap)
  • Use: Normal
  • Between min and max.
  • 128i, N51 (2008-2013)
  • Separate system (ATF cap)
  • Use: Normal
  • Between min and max.
  • 128i, N52 (2007-2013)
  • Separate system (ATF cap)
  • Use: Normal
  • Between min and max.
  • 135i, N54 (2007-2010)
  • Separate system (ATF cap)
  • Use: Normal
  • Between min and max.

Additional Notes

  • The BMW 1 Series E82 (USA) power steering system across all listed configurations carries no fixed fill volume. The specification reads "between min and max," which refers to the fluid level window marked on the reservoir rather than a measured capacity.
  • Because no discrete capacity figure is given, servicing involves a visual level check against the reservoir's minimum and maximum markings rather than adding a predetermined quantity of fluid.
  • All five configurations share the same reservoir cap designation noted as an ATF cap, meaning the reservoir accepts automatic transmission fluid rather than a dedicated power steering fluid.
  • Each configuration runs a separate power steering system, meaning the hydraulic circuit is independent and not integrated with another fluid system on the vehicle.
  • The 128i is covered by two distinct engine variants across the same model years. The N51 applies to 2008-2013 and the N52 applies to 2007-2013, yet both share identical power steering fluid specifications.
  • The 135i is similarly split between two engine variants. The N54 covers 2007-2010 and the N55 covers 2010-2013, with 2010 representing the transition year between the two engines.
  • The M CoupĂ©, spanning 2011-2013, follows the same power steering specification as the standard 128i and 135i variants, with no differentiation in fluid type or reservoir fill method.
  • All listed configurations carry a normal use condition designation, meaning the specifications do not account for a separate severe-use interval or an alternative fluid level procedure under more demanding operating conditions.

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