Audi A8, S8, 4D (USA)

Power steering fluid capacity & service interval

Audi A8, S8, 4D (USA) models utilize power steering fluid with a capacity range of 1,2 to 3 liters. Service intervals require a check every 7500 miles or 12 months. The data covers 10 configurations.

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

TypeSpecifications
  • S8 4.2 V8 40V quattro (265 kW) (2000-2002)
  • System, power steering/levelling
  • Use: Normal
  • Capacity 3 liter
  • Check 7500 miles/ 12 months
S8 4.2 V8 40V quattro (265 kW) (2000-2002)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 7500 miles/ 12 months
  • A8 4.2 V8 32V quattro (228 kW) (1999-2002)
  • System, power steering/levelling
  • Use: Normal
  • Capacity 3 liter
  • Check 7500 miles/ 12 months
A8 4.2 V8 32V quattro (228 kW) (1999-2002)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 7500 miles/ 12 months
  • A8 3.7 V8 32V (169 kW) (1997-1998)
  • System, power steering/levelling
  • Use: Normal
  • Capacity 3 liter
  • Check 7500 miles/ 12 months
A8 3.7 V8 32V (169 kW) (1997-1998)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 7500 miles/ 12 months
  • A8 3.7 V8 32V quattro (169 kW) (1997-1999)
  • System, power steering/levelling
  • Use: Normal
  • Capacity 3 liter
  • Check 7500 miles/ 12 months
A8 3.7 V8 32V quattro (169 kW) (1997-1999)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 7500 miles/ 12 months
  • A8 4.2 V8 40V quattro (220 kW) (1997-1999)
  • System, power steering/levelling
  • Use: Normal
  • Capacity 3 liter
A8 4.2 V8 40V quattro (220 kW) (1997-1999)
  • Use: Normal
  • Capacity 1,2 liter

Additional Notes

  • Across all configurations in the Audi A8, S8, 4D (USA) range, the power steering fluid system is split into two distinct sub-systems, each carrying its own separate capacity figure.
  • The hydraulic system covering power steering and levelling holds 3 liters across every listed configuration, from the A8 3.7 V8 32V through to the S8 4.2 V8 40V quattro.
  • The standalone power steering sub-system carries a capacity of 1.2 liters across all configurations, a notably smaller volume that reflects the more contained circuit dedicated solely to steering assist rather than the combined steering and suspension levelling circuit.
  • The A8 4.2 V8 40V quattro (220 kW) covering 1997-1999 shares the same 3-liter and 1.2-liter capacity figures as the other configurations, but no check interval is listed for either of its sub-systems, unlike the remaining entries which specify a check at 7,500 miles or 12 months.
  • The 7,500-mile or 12-month check interval, applied under normal use conditions, means fluid level and condition are to be inspected at whichever of the two thresholds arrives first, making the interval time-sensitive as well as mileage-sensitive.
  • The S8 4.2 V8 40V quattro (265 kW) covering 2000-2002 carries the same 3-liter hydraulic system capacity and 1.2-liter power steering capacity as the A8 variants, with the same 7,500-mile or 12-month check interval applied under normal use conditions.
  • The A8 4.2 V8 32V quattro (228 kW) covering 1999-2002 represents the highest-displacement engine among the A8 variants listed, yet its fluid capacities for both sub-systems are identical to those of the lower-displacement 3.7 V8 32V, indicating capacity figures are not determined by engine displacement alone.

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