Audi A6 Allroad, 4B (EU)

Differential fluid capacity & service interval

Audi A6 Allroad, 4B (EU) differential fluid capacity ranges from 0,5 to 1,5 liters. Service intervals include checks at 30000, 35000, 60000, and 70000 km. The data covers 7 configurations.

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

TypeSpecifications
  • A6 Allroad 2.5 TDI (120 kW) (2003-2005)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 35000 km
  • A6 Allroad 4.2 V8 (2003-2005)
  • From automatic
  • Use: Normal
  • Capacity 0,5 liter
  • Check 60000 km
  • A6 Allroad 4.2 V8 (2003-2005)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 30000 km
  • A6 Allroad 2.5 TDI (132 kW) (2000-2005)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 70000 km
  • A6 Allroad 2.5 TDI (132 kW) (2000-2005)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 35000 km
  • A6 Allroad 2.7 V6 (2000-2005)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 60000 km
  • A6 Allroad 2.7 V6 (2000-2005)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 30000 km

Additional Notes

  • The rear differential fluid capacity is 1.5 liters across all engine variants in the Audi A6 Allroad 4B, covering the 2.5 TDI (120 kW), 2.5 TDI (132 kW), 2.7 V6, and 4.2 V8 configurations.
  • The front differential (noted as "from automatic") shows more variation in capacity, ranging from 0.5 liters in the 4.2 V8 to 0.8 liters in both the 2.5 TDI (132 kW) and 2.7 V6.
  • The 4.2 V8 front differential capacity of 0.5 liters is notably lower than the 0.8-liter figure shared by the diesel and 2.7 V6 variants, reflecting a difference in the automatic differential unit used in that engine pairing.
  • Rear differential check intervals differ between engine families under normal use conditions. The 2.5 TDI variants specify a 35,000 km interval, while the 2.7 V6 and 4.2 V8 share a shorter 30,000 km interval.
  • The front differential check interval for the 2.5 TDI (132 kW) is 70,000 km under normal use, which is the longest interval listed across all configurations in the A6 Allroad 4B differential specifications.
  • Both the 2.7 V6 and 4.2 V8 share a 60,000 km front differential check interval under normal use conditions, despite differences in displacement and the lower fluid capacity of the V8 unit.
  • The 2.5 TDI in its 120 kW output variant covers only the 2003-2005 period and carries no front differential entry, with only a rear differential specification of 1.5 liters at a 35,000 km check interval.

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