Audi A4, S4, 8K / B8 (USA)

Brake fluid capacity & service interval

Audi A4, S4, 8K / B8 (USA) models utilize brake fluid with a capacity of 1 liter. Service intervals include checks at 5000 miles or 12 months, 10000 miles or 12 months, and a fluid change every 24 months. The data covers 20 configurations.

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

TypeSpecifications
A4 2.0 TFSI (162 kW) (2013-2016)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 2.0 TFSI (162 kW) (2013-2016)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 2.0 TFSI quattro (162 kW) (2013-2016)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 2.0 TFSI quattro (162 kW) (2013-2016)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 Avant quattro 2.0 TFSI (162 kW) (2013-2016)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 Avant quattro 2.0 TFSI (162 kW) (2013-2016)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
S4 (245 kW) (2013-2016)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
S4 (245 kW) (2013-2016)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 2.0 TFSI quattro (155 kW) (2010-2013)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 2.0 TFSI quattro (155 kW) (2010-2013)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 Avant quattro 2.0 TFSI (155 kW) (2010-2013)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 Avant quattro 2.0 TFSI (155 kW) (2010-2013)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
S4 (245 kW) (2009-2013)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
S4 (245 kW) (2009-2013)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 2.0 TFSI (155 kW) (2008-2013)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 2.0 TFSI (155 kW) (2008-2013)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 2.0 TFSI quattro (155 kW) (2008-2010)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 2.0 TFSI quattro (155 kW) (2008-2010)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months
A4 Avant quattro 2.0 TFSI (155 kW) (2008-2010)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 miles/ 12 months
  • Change 24 months
A4 Avant quattro 2.0 TFSI (155 kW) (2008-2010)
  • Use: First check only
  • Capacity 1 liter
  • Check 5000 miles/ 12 months

Additional Notes

  • A 1-liter brake fluid capacity applies uniformly across all configurations in the Audi A4, S4, 8K / B8 (USA) range covered here, spanning the 2.0 TFSI variants in both front-wheel-drive and quattro all-wheel-drive forms, the A4 Avant quattro, and the S4. In brake system servicing, a 1-liter figure represents the total fluid volume held within the hydraulic circuit, including the master cylinder reservoir, brake lines, and calipers.
  • Every configuration carries a dual-interval structure for brake fluid checks. Under normal use conditions, the brake system is checked at 10,000 miles or every 12 months, whichever comes first. A separate first-check-only interval shortens the initial inspection to 5,000 miles or 12 months, applying exclusively to the first service event after the vehicle enters service.
  • The first-check-only interval at 5,000 miles reflects standard practice for new vehicles, where an early inspection confirms that the brake fluid has not absorbed moisture or shown contamination during the initial break-in period. After that single early check, subsequent inspections revert to the 10,000-mile or 12-month normal schedule.
  • A fluid change interval of 24 months is specified under normal use conditions across all configurations. No mileage trigger accompanies the change interval, meaning the 24-month calendar period alone governs replacement regardless of distance traveled. Brake fluid is hygroscopic and absorbs moisture over time, which lowers its boiling point, making time-based replacement intervals standard practice in the industry.
  • The A4 2.0 TFSI is listed in two distinct output variants for the B8 generation: 155 kW covering 2008-2013 and 162 kW covering 2013-2016. Despite the difference in engine output, both share identical brake fluid capacity and service interval specifications, with 1 liter capacity, a 10,000-mile or 12-month check under normal use, and a 24-month change interval.
  • The A4 2.0 TFSI quattro at 155 kW appears as two separate sub-ranges, 2008-2010 and 2010-2013, with no difference in brake fluid specifications between them. Both sub-ranges carry the same 1-liter capacity, 10,000-mile or 12-month normal check, and 24-month change interval, along with the 5,000-mile first-check-only entry.
  • The A4 Avant quattro body style, which denotes the wagon variant with all-wheel drive, shares the same brake fluid specifications as the sedan quattro configurations across all three power output and year range combinations listed. The 155 kW variant spans 2008-2010 and 2010-2013 as separate entries, while the 162 kW variant covers 2013-2016, all with 1-liter capacity and the same check and change intervals.
  • The S4 at 245 kW, representing the higher-performance variant of the B8 platform, carries the same brake fluid capacity and service intervals as the A4 configurations. The S4 is listed across two sub-ranges, 2009-2013 and 2013-2016, with no deviation from the 1-liter capacity, 10,000-mile or 12-month normal check, 24-month change, and 5,000-mile first-check-only schedule.

Other Systems