Audi A4, S4, RS 4, 8E / B7 (USA)

Differential fluid capacity & service interval

Audi A4, S4, RS 4, 8E / B7 (USA) differential fluid capacity ranges from 0,9 to 1,5 liters. Service intervals include checks at 15000 miles/12 months or 20000 miles/12 months. The data covers 28 configurations.

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

TypeSpecifications
  • RS 4 4.2 V8 quattro (309 kW) (2006-2008)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Check 20000 miles/ 12 months
  • Code: 0AR
  • RS 4 4.2 V8 quattro (309 kW) (2006-2008)
  • Rear
  • Use: First check only
  • Capacity 0,9 liter
  • Check 15000 miles/ 12 months
  • Code: 0AR
  • A4 2.0 T (147 kW) (2005-2008)
  • CVT
  • Use: Normal
  • Capacity 1,3 liter
  • Check 20000 miles/ 12 months
  • A4 2.0 T (147 kW) (2005-2008)
  • CVT
  • Use: First check only
  • Capacity 1,3 liter
  • Check 15000 miles/ 12 months
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • From automatic
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • Code: 01R
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months
  • Code: 01R
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Check 20000 miles/ 12 months
  • Code: 08V
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 1 liter
  • Check 15000 miles/ 12 months
  • Code: 08V
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Check 20000 miles/ 12 months
  • Code: 0AR
  • A4 2.0 T quattro (147 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 0,9 liter
  • Check 15000 miles/ 12 months
  • Code: 0AR
  • A4 3.2 (188 kW) (2005-2008)
  • Front
  • Use: Normal
  • Capacity 1,3 liter
  • Check 20000 miles/ 12 months
  • A4 3.2 (188 kW) (2005-2008)
  • Front
  • Use: First check only
  • Capacity 1,3 liter
  • Check 15000 miles/ 12 months
  • A4 3.2 quattro (188 kW) (2005-2008)
  • From automatic
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
  • A4 3.2 quattro (188 kW) (2005-2008)
  • From automatic
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • Code: 01R
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months
  • Code: 01R
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Check 20000 miles/ 12 months
  • Code: 08V
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 1 liter
  • Check 15000 miles/ 12 months
  • Code: 08V
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Check 20000 miles/ 12 months
  • Code: 0AR
  • A4 3.2 quattro (188 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 0,9 liter
  • Check 15000 miles/ 12 months
  • Code: 0AR
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Front
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Front
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 miles/ 12 months
  • Code: 01R
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Rear
  • Use: First check only
  • Capacity 1,5 liter
  • Check 15000 miles/ 12 months
  • Code: 01R
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Check 20000 miles/ 12 months
  • Code: 0AR
  • S4 4.2 V8 quattro (253 kW) (2005-2008)
  • Rear
  • Use: First change only
  • Capacity 0,9 liter
  • Check 15000 miles/ 12 months
  • Code: 0AR

Additional Notes

  • The Audi A4 2.0 T (147 kW) CVT differential holds 1.3 liters of fluid. A CVT, or continuously variable transmission, uses a differential unit that is serviced separately from the main transmission assembly, which accounts for the dedicated capacity figure listed here.
  • Across all configurations in the 2005-2008 A4, S4, and RS 4 lineup, the standard check interval for differential fluid is every 20,000 miles or 12 months under normal use conditions. The first-check-only interval is shorter, set at 15,000 miles or 12 months, reflecting the practice of an earlier inspection after initial break-in of new gear oil and mechanical components.
  • The A4 2.0 T quattro (147 kW) lists three distinct rear differential capacities: 1.5 liters, 1.0 liter, and 0.9 liter. These figures correspond to different rear differential unit variants that may be fitted to the same engine and drivetrain combination, each with its own housing volume.
  • The front differential on the A4 3.2 (188 kW) non-quattro holds 1.3 liters, the same capacity as the CVT differential on the 2.0 T. In a front-wheel-drive layout, the front differential is integrated with the transaxle and handles all driven-axle torque distribution.
  • The A4 3.2 quattro (188 kW) and A4 2.0 T quattro (147 kW) share identical differential capacities across all three differential positions: 1.1 liters from the automatic, and 1.5, 1.0, or 0.9 liters at the rear. The same rear differential unit variants appear across both engine displacements in the quattro configuration.
  • The S4 4.2 V8 quattro (253 kW) front differential holds 1.1 liters, which matches the "from automatic" differential capacity listed for the quattro four-cylinder variants. The rear differential on the S4 is listed at either 1.5 liters or 0.9 liters, indicating two possible rear differential unit fitments for the 2005-2008 model years.
  • The RS 4 4.2 V8 quattro (309 kW), covering 2006-2008, lists only a rear differential capacity of 0.9 liters. No front differential or center differential entry appears in the specifications for the RS 4, distinguishing its listed service data from the S4 and quattro A4 entries.
  • The 1.5-liter rear differential capacity is the largest rear differential figure across all configurations in the 2005-2008 range. A larger housing volume generally indicates a heavier-duty or physically larger differential unit, and the 1.5-liter figure appears in the quattro A4 variants and the S4 but not in the RS 4 specifications.

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