Audi A6 Allroad, 4B (USA)

Differential fluid capacity & service interval

Audi A6 Allroad, 4B (USA) differential fluid capacity ranges from 0,8 to 1,9 liters. Service intervals include checks at 15000 miles or 12 months and 20000 miles or 12 months. The data covers 16 configurations.

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

TypeSpecifications
  • A6 Allroad 4.2 5V quattro (221 kW) (2003-2005)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad 4.2 5V quattro (221 kW) (2003-2005)
  • From automatic
  • Use: First check only
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad 4.2 5V quattro (221 kW) (2003-2005)
  • Rear
  • Use: Normal
  • Capacity 1,9 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad 4.2 5V quattro (221 kW) (2003-2005)
  • Rear
  • Use: First check only
  • Capacity 1,9 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (169 kW) (2002-2005)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (169 kW) (2002-2005)
  • From automatic
  • Use: First check only
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (169 kW) (2002-2005)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (169 kW) (2002-2005)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2002-2004)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2002-2004)
  • From automatic
  • Use: First check only
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2002-2004)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2002-2004)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2000-2002)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2000-2002)
  • From automatic
  • Use: First check only
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2000-2002)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • A6 Allroad Bi Turbo 2.7 5V quattro (187 kW) (2000-2002)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months

Additional Notes

  • The Audi A6 Allroad, 4B (USA) 4.2 5V quattro (221 kW) carries a rear differential fluid capacity of 1.9 liters, which is notably larger than the 1.5-liter rear differential capacity found across all 2.7 5V quattro variants in the same generation.
  • The front differential fluid capacity tied to the automatic transmission measures 0.8 liters across every engine variant in the lineup, covering the 4.2 5V quattro (221 kW) and all 2.7 5V quattro output levels.
  • Under normal use conditions, the differential fluid check interval for all listed configurations is set at 20,000 miles or 12 months, whichever comes first.
  • A first check only interval of 15,000 miles or 12 months applies to both the front and rear differentials across all variants, reflecting an earlier inspection point during the initial service period before the standard 20,000-mile cadence takes over.
  • The 2.7 5V quattro in 169 kW form, covering 2002-2005, shares identical differential fluid capacities with the 187 kW versions: 0.8 liters at the front differential from automatic and 1.5 liters at the rear differential.
  • The 187 kW version of the 2.7 5V quattro appears across two separate year ranges, 2000-2002 and 2002-2004, both carrying the same 0.8-liter front and 1.5-liter rear differential capacities with identical check intervals under both normal and first check only conditions.

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