Audi A4, S4, 8E / B6 (USA)

Brake fluid capacity & service interval

Audi A4, S4, 8E / B6 (USA) models require 2 liters of brake fluid. Service intervals include checks at 5000 miles or 12 months, 10000 miles or 12 months, and fluid changes every 24 months. The data covers 10 configurations.

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

TypeSpecifications
S4 4.2 quattro (253 kW) (2003-2005)
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
S4 4.2 quattro (253 kW) (2003-2005)
  • Use: First check only
  • Capacity 2 liter
  • Check 5000 miles/ 12 months
A4 1.8 T (125 kW) (2001-2005)
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 1.8 T (125 kW) (2001-2005)
  • Use: First check only
  • Capacity 2 liter
  • Check 5000 miles/ 12 months
A4 1.8 T quattro (125 kW) (2001-2005)
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 1.8 T quattro (125 kW) (2001-2005)
  • Use: First check only
  • Capacity 2 liter
  • Check 5000 miles/ 12 months
A4 3.0 5V (162 kW) (2001-2005)
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 3.0 5V (162 kW) (2001-2005)
  • Use: First check only
  • Capacity 2 liter
  • Check 5000 miles/ 12 months
A4 3.0 5V quattro (162 kW) (2001-2005)
  • Use: Normal
  • Capacity 2 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 3.0 5V quattro (162 kW) (2001-2005)
  • Use: First check only
  • Capacity 2 liter
  • Check 5000 miles/ 12 months

Additional Notes

  • The brake system capacity across all listed configurations of the Audi A4, S4, 8E / B6 (USA) is 2 liters, which represents the total fluid volume held within the hydraulic brake circuit including the master cylinder reservoir and lines.
  • Under normal use conditions, the brake fluid change interval is set at 24 months for all configurations spanning 2001-2005, regardless of engine displacement or drivetrain.
  • The normal use check interval is 10,000 miles or 12 months, whichever comes first, and applies uniformly across the A4 1.8 T, A4 3.0 5V, and S4 4.2 quattro configurations.
  • A separate first check only condition is specified for all configurations, requiring an inspection at 5,000 miles or 12 months. Brake fluid is hygroscopic and absorbs moisture over time, so an earlier initial check allows for assessment of fluid condition before the standard interval cycle begins.
  • The front-wheel-drive and quattro all-wheel-drive variants of both the A4 1.8 T and A4 3.0 5V share identical brake fluid capacities and service intervals, with no differentiation in the specifications between the two drivetrain configurations.
  • The S4 4.2 quattro, covering 2003-2005, carries the same 2-liter brake fluid capacity and 24-month change interval as the lower-displacement A4 variants, despite the substantially higher output of 253 kW compared to 125 kW and 162 kW in the A4 configurations.

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