MINI Mini, R50, R53 (USA)

Power steering fluid capacity & service interval

MINI Mini, R50, R53 (USA) models utilize 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
  • MINI Cooper S John Cooper Works GP (160 kW), R53 (2005-2006)
  • Electro-Hydraulic (CHF cap)
  • Use: Normal
  • Between min and max.
  • MINI Cooper (85 kW) (2004-2006)
  • Electro-Hydraulic (CHF cap)
  • Use: Normal
  • Between min and max.
  • MINI Cooper S (125 kW) (2004-2006)
  • Electro-Hydraulic (CHF cap)
  • Use: Normal
  • Between min and max.
  • MINI Cooper (85 kW) (2001-2004)
  • Electro-Hydraulic (CHF cap)
  • Use: Normal
  • Between min and max.
  • MINI Cooper S (120 kW) (2001-2004)
  • Electro-Hydraulic (CHF cap)
  • Use: Normal
  • Between min and max.

Additional Notes

  • All five configurations across the MINI Mini R50/R53 (USA) lineup share the same power steering fluid fill specification: the reservoir level is to be maintained between the minimum and maximum marks, with no fixed volume stated.
  • The "between min and max" specification is a level-check standard rather than a measured fill quantity, meaning fluid is added only to bring the reservoir within the marked range rather than to a precise measured amount.
  • Every configuration in the R50/R53 range uses an electro-hydraulic power steering system, which combines an electric motor to drive a hydraulic pump rather than relying on engine-driven hydraulic pressure.
  • The CHF cap designation noted across all configurations indicates the reservoir is marked for Central Hydraulic Fluid, a specific synthetic fluid type used in electro-hydraulic systems and not interchangeable with conventional power steering fluids.
  • The Cooper variant saw a power output revision from 85 kW across two distinct production spans, 2001-2004 and 2004-2006, yet the power steering fluid specification remained unchanged between the two.
  • The Cooper S similarly transitioned from 120 kW (2001-2004) to 125 kW (2004-2006), and again the power steering fluid type and fill method remained consistent across the output change.
  • The John Cooper Works GP at 160 kW, produced for the R53 in 2005-2006, carries the highest output rating among the listed configurations and still shares the identical CHF-based electro-hydraulic fluid specification as the standard Cooper and Cooper S variants.
  • All specifications are listed under normal use conditions, with no separate severe-use interval or fill variation defined for any configuration in the range.

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