Audi A6, C4 (USA)

Automatic transmission fluid capacity & service interval

Audi A6, C4 (USA) automatic transmission fluid capacity is 7 liter. Service intervals include checking at 15000 miles or 24 months and changing at 45000 miles. The data covers 4 configurations.

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

TypeSpecifications
A6 2.8 V6 (128 kW) (1996-1997)
  • Use: Normal
  • Capacity 7 liter
  • Check 15000 miles/ 24 months
  • Code: 01K 4/1
A6 2.8 V6 Wagon (128 kW) (1996-1997)
  • Use: Normal
  • Capacity 7 liter
  • Check 15000 miles/ 24 months
  • Change 45000 miles
  • Code: 01K 4/1
A6 2.8 V6 (128 kW) (1994-1996)
  • Use: Normal
  • Capacity 7 liter
  • Code: 01K 4/1
A6 2.8 V6 Wagon (128 kW) (1994-1996)
  • Use: Normal
  • Capacity 7 liter
  • Code: 01K 4/1

Additional Notes

  • Across all listed configurations of the Audi A6 C4 (USA), the automatic transmission fluid capacity is uniformly 7 liters, which is consistent with a service fill volume rather than a full overhaul or dry fill, as those typically require a higher quantity to account for fluid retained in the torque converter and valve body.
  • The 2.8 V6 sedan in its 1994-1996 form carries no interval specification alongside the 7-liter capacity, while the 1996-1997 variant of the same engine adds a check interval of 15,000 miles or 24 months under normal use conditions.
  • The Wagon body style follows a parallel pattern: the 1994-1996 A6 2.8 V6 Wagon lists only the 7-liter capacity with no interval data, whereas the 1996-1997 Wagon adds both a check interval of 15,000 miles or 24 months and a change interval of 45,000 miles under normal use.
  • The 45,000-mile change interval appears exclusively in the 1996-1997 A6 2.8 V6 Wagon specification, making it the only configuration among the listed entries to carry a fluid replacement interval rather than just a fluid level check interval.
  • The check interval of 15,000 miles or 24 months is structured as a dual condition, meaning the interval is triggered by whichever threshold is reached first, whether mileage or time elapsed.
  • The overlap year of 1996 appears in both the 1994-1996 and 1996-1997 specification rows for both the sedan and Wagon, indicating that 1996 model year vehicles may correspond to either specification set depending on production timing or market introduction of the updated service schedule.

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