Audi A4, S4, RS 4, 8E / B7 (USA)

Transfer case fluid capacity & service interval

Audi A4, S4, RS 4, 8E / B7 (USA) models utilize transfer case fluid with a capacity of 0,55 liter. Service intervals include checks at 20000 miles/ 12 months and 15000 miles/ 12 months. The data covers 6 configurations.

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

TypeSpecifications
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 0,55 liter
  • Check 20000 miles/ 12 months
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • From automatic
  • Use: First check only
  • Capacity 0,55 liter
  • Check 15000 miles/ 12 months
  • A4 3.2 quattro (188 kW) (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 0,55 liter
  • Check 20000 miles/ 12 months
  • A4 3.2 quattro (188 kW) (2005-2008)
  • From automatic
  • Use: First check only
  • Capacity 0,55 liter
  • Check 15000 miles/ 12 months
S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Use: Normal
  • Capacity 0,55 liter
  • Check 20000 miles/ 12 months
S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Use: First check only
  • Capacity 0,55 liter
  • Check 15000 miles/ 12 months

Additional Notes

  • Across all listed configurations of the Audi A4, S4, RS 4 8E/B7 (USA) for 2005-2008, the transfer case fluid capacity is 0.55 liter, a figure consistent with the compact, single-speed transfer boxes commonly found in longitudinally mounted quattro drivetrains of that era.
  • The A4 2.0 T quattro (147 kW) transfer box is noted specifically as sourced from an automatic transmission assembly, a detail that distinguishes the fluid service context from a standalone transfer case unit.
  • The A4 3.2 quattro (188 kW) shares the same 0.55 liter transfer case capacity and the same automatic-sourced transfer box notation as the 2.0 T quattro, meaning the two engines do not differ in transfer case fluid volume despite their displacement gap.
  • The S4 4.2 V8 quattro (253 kW) carries the same 0.55 liter transfer case capacity as both A4 variants, though its specifications carry no automatic-sourced notation, indicating a different transfer case assembly context.
  • For the A4 2.0 T quattro and A4 3.2 quattro, the first check only interval is set at 15,000 miles or 12 months, which is 5,000 miles shorter than the 20,000-mile normal interval, reflecting a tighter initial inspection window tied to early fluid conditioning in a new or recently serviced unit.
  • The normal use interval across all listed configurations, including the S4 4.2 V8 quattro, is 20,000 miles or 12 months, with the 12-month time limit applying regardless of mileage accumulation within that period.
  • The S4 4.2 V8 quattro also carries a first check only interval of 15,000 miles or 12 months, aligning with the same shortened initial service window applied to the A4 variants despite the differing transfer case assembly notation.

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