Audi A7, S7, RS 7, 4KA (USA)

Transfer case fluid capacity & service interval

Audi A7, S7, RS 7, 4KA (USA) transfer case fluid capacity ranges from 0,8 to 1 liter. Service intervals include a check every 20000 miles or 24 months. The data covers 3 configurations.

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

TypeSpecifications
  • RS 7 Performance TFSI quattro (463 kW) (2023- )
  • From automatic
  • Use: Normal
  • Capacity 0,8-1 liter
  • RS 7 TFSI quattro (441 kW) (2021-2023)
  • From automatic
  • Use: Normal
  • Capacity 0,8-1 liter
S7 TFSI quattro (331 kW) (2019- )
  • Use: Normal
  • Capacity 1 liter (Initial fill)
  • Capacity 0,8 liter (Refill)
  • Check 20000 miles/ 24 months

Additional Notes

  • The Audi A7, S7, RS 7 4KA transfer case fluid capacities fall within a narrow range across all listed configurations, spanning 0.8 to 1 liter depending on the variant and fill type.
  • The S7 TFSI quattro (331 kW) starting from 2019 distinguishes between an initial fill of 1 liter and a refill capacity of 0.8 liter, reflecting the difference between a dry fill during overhaul or assembly and a top-up during routine service when residual fluid remains in the unit.
  • The RS 7 TFSI quattro (441 kW) covering 2021-2023 and the RS 7 Performance TFSI quattro (463 kW) starting from 2023 both carry a capacity range of 0.8-1 liter under normal use conditions, without a separate initial fill figure, meaning the range accounts for variation rather than a defined overhaul-versus-service distinction.
  • All three configurations specify the transfer case fluid as sourced from the automatic transmission, noted as "from automatic," which indicates the transfer case shares fluid type with the connected automatic gearbox rather than using a standalone specification.
  • The S7 TFSI quattro (331 kW) carries a stated service interval of 20,000 miles or 24 months under normal use conditions, tying the check interval directly to a time-and-distance dual threshold rather than a single criterion alone.
  • The RS 7 variants do not carry a listed service interval in the specifications, whereas the S7 TFSI quattro (331 kW) is the only configuration among the three with an explicit 20,000-mile or 24-month check interval defined.

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