Audi Q8, SQ8, RS Q8, 4MN / 4MT (USA)

Brake fluid capacity & service interval

Audi Q8, SQ8, RS Q8, 4MN / 4MT (USA) models require 1 liter of brake fluid. Service intervals include a check every 10000 miles or 12 months and a change every 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 Q8 4.0 TFSI quattro (441 kW) (2019-2024)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
SQ8 4.0 TFSI quattro (373 kW) (2019- )
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
Q8 55 TFSI quattro (250 kW) (2018- )
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months

Additional Notes

  • The brake system capacity across the Audi Q8, SQ8, and RS Q8 lineup is 1 liter for all listed configurations, which is a typical figure for a passenger vehicle brake hydraulic circuit and reservoir combined fill.
  • The Q8 55 TFSI quattro (250 kW), the SQ8 4.0 TFSI quattro (373 kW), and the RS Q8 4.0 TFSI quattro (441 kW) all share an identical 1-liter brake fluid capacity, indicating no variation in brake system volume across the power outputs represented in these specifications.
  • A brake fluid check interval of 10,000 miles or 12 months, whichever comes first, applies to all three configurations under normal use conditions.
  • The change interval for brake fluid is set at 24 months across all listed configurations under normal use conditions, meaning fluid replacement is due on a strictly time-based schedule rather than a mileage-based one.
  • The 24-month change interval reflects the hygroscopic nature of brake fluid, which absorbs moisture from the atmosphere over time and lowers its boiling point regardless of mileage accumulated.
  • The RS Q8 4.0 TFSI quattro (441 kW) carries the same 1-liter capacity and 24-month change interval as the lower-output Q8 55 TFSI quattro (250 kW), despite the substantial difference in engine output between the two variants.

Other Systems