Audi A4, S4, 8D / B5 (USA)

Differential fluid capacity & service interval

Audi A4, S4, 8D / B5 (USA) differential fluid capacity ranges from 0,8 to 1,9 liters. Service intervals include checks at 10000 miles or 12 months and 15000 miles or 12 months. The data covers 10 configurations.

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

TypeSpecifications
  • S4 2.7 Bi-turbo V6 quattro (187 kW) (1999-2001)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • S4 2.7 Bi-turbo V6 quattro (187 kW) (1999-2001)
  • Rear
  • Use: Normal
  • Capacity 1,9 liter
  • Check 15000 miles/ 12 months
  • A4 1.8 T 5V (110 kW) (1997-2001)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 10000 miles/ 12 months
  • A4 1.8 T 5V quattro (110 kW) (1997-2001)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 10000 miles/ 12 months
  • A4 1.8 T 5V quattro (110 kW) (1997-2001)
  • Rear
  • Use: Normal
  • Capacity 1,9 liter (Initial fill)
  • Capacity 1,8 liter (Refill)
  • Check 10000 miles/ 12 months
  • Code: 01H
  • A4 2.8 V6 (142 kW) (1997-2001)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A4 2.8 V6 quattro (142 kW) (1997-2001)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A4 2.8 V6 (128 kW) (1996-1997)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A4 2.8 V6 quattro (128 kW) (1996-1997)
  • From automatic
  • Use: Normal
  • Capacity 0,8 liter
  • Check 15000 miles/ 12 months
  • A4 2.8 V6 quattro (128 kW) (1996-1997)
  • Rear
  • Use: Normal
  • Capacity 1,9 liter (Initial fill)
  • Capacity 1,8 liter (Refill)
  • Check 15000 miles/ 12 months
  • Code: 01H

Additional Notes

  • The front differential capacity tied to the automatic transmission measures 0.8 liter across all engine variants in the Audi A4 and S4 B5 lineup, from the 1.8 T through the 2.8 V6 and the S4 2.7 Bi-turbo. A capacity at this scale is typical of a compact integrated differential housing rather than a standalone unit.
  • Rear differential entries carry separate initial fill and refill capacities for several quattro variants. The A4 1.8 T 5V quattro and both A4 2.8 V6 quattro (128 kW) configurations list an initial fill of 1.9 liters against a refill value of 1.8 liters. The 0.1-liter difference reflects fluid retained in passages and bearing surfaces during a partial drain, which is a standard characteristic of refill versus overhaul fill figures.
  • The S4 2.7 Bi-turbo V6 quattro rear differential lists a single capacity value of 1.9 liters without a separate refill figure, in contrast to the A4 quattro rear differential entries that distinguish between initial and refill amounts.
  • The A4 1.8 T 5V variants carry a check interval of 10,000 miles or 12 months under normal use conditions, applying to both the front differential from automatic and the rear differential on quattro models.
  • All 2.8 V6 configurations, including the non-quattro A4 2.8 V6 (128 kW) from 1996-1997, the higher-output 142 kW version from 1997-2001, and the corresponding quattro variants, share a check interval of 15,000 miles or 12 months under normal use. The S4 2.7 Bi-turbo V6 quattro follows the same 15,000-mile or 12-month interval.
  • The A4 2.8 V6 appears in two distinct output ratings across the B5 generation. The 128 kW version covers 1996-1997, while the 142 kW version spans 1997-2001. Both share identical differential fluid capacities and check intervals despite the difference in power output.
  • All differential fluid service entries across the full range of A4 and S4 B5 configurations are designated for normal use conditions. No severe-use interval variants appear in the specifications for any of the listed engine and drivetrain combinations.

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