Audi A4, S4 Cabriolet, 8H / B6 (USA)

Differential fluid capacity & service interval

Audi A4, S4 Cabriolet, 8H / B6 (USA) differential fluid capacity ranges from 0,9 to 1,9 liters. Service intervals include checks at 15000 miles or 12 months and 20000 miles or 12 months. The data covers 8 configurations.

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

TypeSpecifications
  • S4 Cabriolet (253 kW) (2003-2005)
  • Front
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
  • S4 Cabriolet (253 kW) (2003-2005)
  • Front
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
  • S4 Cabriolet (253 kW) (2003-2005)
  • Rear
  • Use: Normal
  • Capacity 0,9-1,9 liter
  • Check 20000 miles/ 12 months
  • S4 Cabriolet (253 kW) (2003-2005)
  • Rear
  • Use: First check only
  • Capacity 0,9-1,9 liter
  • Check 15000 miles/ 12 months
  • A4 Cabriolet 1.8 T (125 kW) (2002-2005)
  • Front
  • Use: Normal
  • Capacity 1,3 liter
  • Check 20000 miles/ 12 months
  • A4 Cabriolet 1.8 T (125 kW) (2002-2005)
  • Front
  • Use: First check only
  • Capacity 1,3 liter
  • Check 15000 miles/ 12 months
  • A4 Cabriolet 3.0 5V (162 kW) (2002-2005)
  • Front
  • Use: Normal
  • Capacity 1,3 liter
  • Check 20000 miles/ 12 months
  • A4 Cabriolet 3.0 5V (162 kW) (2002-2005)
  • Front
  • Use: First check only
  • Capacity 1,3 liter
  • Check 15000 miles/ 12 months

Additional Notes

  • The Audi A4 Cabriolet 1.8 T (125 kW) and 3.0 5V (162 kW) share an identical front differential fluid capacity of 1.3 liters across the 2002-2005 model years, indicating no variation between the four-cylinder turbocharged and naturally aspirated V6 configurations in terms of front differential fill volume.
  • The S4 Cabriolet (253 kW) carries a smaller front differential capacity of 1.1 liters for the 2003-2005 period, which is 0.2 liters less than the front differential capacity specified for both A4 Cabriolet engine variants.
  • A rear differential is specified exclusively for the S4 Cabriolet (253 kW), reflecting the all-wheel drive architecture of the S4 compared to the front-wheel drive layout of the A4 Cabriolet variants covered in these specifications.
  • The rear differential capacity on the S4 Cabriolet is listed as a range of 0.9 to 1.9 liters, a notably wide spread that reflects variation in the actual fluid level at the time of service rather than a fixed fill volume, which is common with differentials that are filled to a level port rather than a measured quantity.
  • Under normal use conditions, all configurations across both the A4 and S4 Cabriolet share a front differential check interval of 20,000 miles or 12 months, whichever comes first.
  • A first check only interval of 15,000 miles or 12 months applies to all configurations, meaning the initial differential fluid inspection occurs earlier than subsequent normal-use intervals, a practice associated with break-in wear debris monitoring in new or rebuilt units.
  • The rear differential on the S4 Cabriolet follows the same interval structure as the front differentials, with a first check at 15,000 miles or 12 months and normal subsequent checks at 20,000 miles or 12 months.

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