Audi A6, S6, RS 6, 4A2 / 4A5 (USA)

Automatic transmission fluid capacity & service interval

Audi A6, S6, RS 6, 4A2 / 4A5 (USA) models utilize automatic transmission fluid with a capacity range of 3,5 to 8,6 liters. Service intervals include a check every 20000 miles or 24 months and a change every 40000 miles. The data covers 9 configurations.

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

TypeSpecifications
RS 6 Performance TFSI quattro (463 kW) (2023- )
  • Use: Normal
  • Capacity 8,6 liter (Dry fill)
  • Capacity 3,6-4 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Code: 0D6 8/1
  • A6 45 TFSI quattro (195 kW) (2021- )
  • Clutch part
  • Use: Normal
  • Capacity 4,35 liter (Dry fill)
  • Capacity 3,5 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Change 40000 miles
  • Code: 0CJ (DL382)
  • A6 45 TFSI quattro (195 kW) (2021- )
  • Transmission part
  • Use: Normal
  • Capacity 3,8 liter
  • Check 20000 miles/ 24 months
  • Code: 0CJ (DL382) 7/1
RS 6 TFSI quattro (441 kW) (2021-2023)
  • Use: Normal
  • Capacity 8,6 liter (Dry fill)
  • Capacity 3,6-4 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Code: 0D6 8/1
S6 TFSI quattro (331 kW) (2019- )
  • Use: Normal
  • Capacity 8,6 liter (Dry fill)
  • Capacity 3,6-4 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Code: 0D5 8/1
  • A6 45 TFSI quattro (185 kW) (2018-2021)
  • Clutch part
  • Use: Normal
  • Capacity 4,35 liter (Dry fill)
  • Capacity 3,5 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Change 40000 miles
  • Code: 0CJ (DL382)
  • A6 45 TFSI quattro (185 kW) (2018-2021)
  • Transmission part
  • Use: Normal
  • Capacity 3,8 liter
  • Check 20000 miles/ 24 months
  • Code: 0CJ (DL382) 7/1
  • A6 55 TFSI quattro (250 kW) (2018- )
  • Clutch part
  • Use: Normal
  • Capacity 3,5 liter (Dry fill)
  • Capacity 4,35 liter (Service fill)
  • Check 20000 miles/ 24 months
  • Change 40000 miles
  • Code: 0HL
  • A6 55 TFSI quattro (250 kW) (2018- )
  • Transmission part
  • Use: Normal
  • Capacity 3,8 liter (Dry fill)
  • Check 20000 miles/ 24 months
  • Code: 0HL 7/1

Additional Notes

  • The Audi A6 45 TFSI quattro uses a semi-automatic transmission divided into two separate fluid circuits: a clutch part and a transmission part, each with its own capacity and service specifications.
  • For the A6 45 TFSI quattro (185 kW, 2018-2021) and the 195 kW variant, the clutch part carries a dry fill capacity of 4.35 liters, while the service fill capacity drops to 3.5 liters. The lower service fill figure reflects the volume needed when residual fluid remains in the circuit during a routine fluid exchange, rather than a complete drain of a dry unit.
  • The A6 55 TFSI quattro (250 kW) reverses the clutch part capacity values relative to the 45 TFSI variants, listing a dry fill of 3.5 liters and a service fill of 4.35 liters. This inversion is a notable difference between the two engine configurations within the same model line.
  • The transmission part of the semi-automatic unit across the A6 45 TFSI quattro (185 kW, 2018-2021), the 195 kW variant, and the 55 TFSI quattro all share a 3.8-liter capacity. The 55 TFSI specification labels this value as a dry fill, while the 45 TFSI entries list it without that qualifier.
  • The clutch part of the semi-automatic transmission across the A6 45 TFSI quattro (185 kW), the 195 kW variant, and the 55 TFSI quattro all carry a fluid change interval of 40,000 miles under normal use conditions. No change interval is listed for the transmission part in any of these configurations.
  • All semi-automatic transmission circuits across the A6 45 TFSI quattro and 55 TFSI quattro share a fluid check interval of 20,000 miles or 24 months, whichever comes first, under normal use conditions.
  • The RS 6 TFSI quattro (441 kW, 2021-2023) and the RS 6 Performance TFSI quattro (463 kW, starting 2023) both use a conventional automatic transmission with a dry fill capacity of 8.6 liters. This figure is substantially higher than the semi-automatic clutch and transmission part capacities listed for the A6 variants, consistent with the larger fluid volume typical of a torque-converter automatic gearbox.
  • The S6 TFSI quattro (331 kW, starting 2019) shares the same automatic transmission dry fill capacity of 8.6 liters and the same service fill range of 3.6 to 4.0 liters as both RS 6 configurations. The service fill range rather than a fixed value reflects variability in the amount of fluid retained after draining.
  • No fluid change interval is specified for the automatic transmission in the RS 6 TFSI quattro, RS 6 Performance TFSI quattro, or S6 TFSI quattro. All three list only a check interval of 20,000 miles or 24 months under normal use conditions.

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