Audi A8L, S8L, 4N / 4NL (USA)

Coolant capacity & service interval

Audi A8L, S8L, 4N / 4NL (USA) models require coolant with a capacity of 10 liters. Service intervals consist of checks every 20000 miles or 24 months. The data covers 5 configurations.

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

TypeSpecifications
S8L 4.0 TFSI quattro (420 kW) (2022- )
  • Use: Normal
  • Capacity 10 liter
  • Check 20000 miles/ 24 months
A8L 60 TFSI e quattro (330 kW) (2019-2022)
  • Use: Normal
  • Capacity 10 liter
  • Check 20000 miles/ 24 months
A8L 55 TFSI quattro (250 kW) (2018- )
  • Use: Normal
  • Capacity 10 liter
  • Check 20000 miles/ 24 months
A8L 60 TFSI quattro (337 kW) (2018-2022)
  • Use: Normal
  • Capacity 10 liter
  • Check 20000 miles/ 24 months
S8L 4.0 TFSI quattro (420 kW) (2018-2022)
  • Use: Normal
  • Capacity 10 liter
  • Check 20000 miles/ 24 months

Additional Notes

  • Across all listed configurations of the Audi A8L, S8L, 4N / 4NL (USA), the cooling system capacity is uniformly specified at 10 liters, a figure consistent with large-displacement, full-size luxury sedan cooling circuits that must manage heat across extended engine and transmission cooling loops.
  • The 10-liter capacity listed for each configuration represents a service fill volume, meaning the amount of coolant required when refilling or replacing fluid in a fully drained system under normal workshop conditions.
  • The A8L 60 TFSI e quattro (330 kW), covering 2019-2022, shares the same 10-liter cooling system capacity as the non-hybrid A8L variants despite incorporating a plug-in hybrid powertrain, which typically adds separate thermal management circuits for the battery and electric motor.
  • The S8L 4.0 TFSI quattro (420 kW) appears under two separate entries, one covering 2018-2022 and another starting from 2022, both specifying an identical 10-liter capacity and the same check interval of 20,000 miles or 24 months.
  • The service interval for all listed configurations is a coolant check at 20,000 miles or 24 months under normal use conditions, rather than a full coolant replacement, indicating a monitoring-based maintenance approach rather than a fixed drain-and-fill schedule at that interval.
  • The 20,000-mile or 24-month check interval applies uniformly across the A8L 55 TFSI quattro (250 kW), A8L 60 TFSI quattro (337 kW), A8L 60 TFSI e quattro (330 kW), and both S8L 4.0 TFSI quattro (420 kW) entries, with no variation tied to engine output or configuration type.

Other Systems