Audi A4, S4, 8W (USA)

Differential fluid capacity & service interval

Audi A4, S4, 8W (USA) differential fluid capacity ranges from 0,67 to 1 liter. Service intervals require checks every 20000 miles or 24 months. The data covers 16 configurations.

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

TypeSpecifications
  • A4 40 TFSI quattro (150 kW) (2020- )
  • Rear
  • Use: Normal
  • Capacity 0,96 liter
  • Check 20000 miles/ 24 months
  • Code: 0BO
  • A4 40 TFSI quattro (150 kW) (2020- )
  • Rear
  • Use: Normal
  • Capacity 0,67 liter
  • Check 20000 miles/ 24 months
  • Code: 0DB
  • A4 45 TFSI quattro (195 kW) (2020- )
  • Rear
  • Use: Normal
  • Capacity 0,96 liter
  • Check 20000 miles/ 24 months
  • Code: 0BO
  • A4 45 TFSI quattro (195 kW) (2020- )
  • Rear
  • Use: Normal
  • Capacity 0,67 liter
  • Check 20000 miles/ 24 months
  • Code: 0DB
  • A4 45 TFSI quattro (185 kW) (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 0,96 liter
  • Check 20000 miles/ 24 months
  • Code: 0BO
  • A4 45 TFSI quattro (185 kW) (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 0,67 liter
  • Check 20000 miles/ 24 months
  • Code: 0DB
  • S4 3.0 TFSI quattro (260 kW) (2018- )
  • From automatic
  • Use: Normal
  • Capacity 1 liter (Dry fill)
  • Capacity 0,9 liter (Service fill)
  • Check 20000 miles/ 24 months
  • S4 3.0 TFSI quattro (260 kW) (2018- )
  • Rear
  • Use: Normal
  • Capacity 0,95 liter
  • Check 20000 miles/ 24 months
  • Code: 0D3
  • S4 3.0 TFSI quattro (260 kW) (2018- )
  • Rear
  • Use: Normal
  • Capacity 0,85 liter
  • Check 20000 miles/ 24 months
  • Code: 0G2
  • S4 3.0 TFSI quattro (260 kW) (2018- )
  • Rear, outer sections
  • Use: Normal
  • Capacity 0,93 liter
  • Check 20000 miles/ 24 months
  • Code: 0D3
  • A4 2.0 TFSI quattro (185 kW) (2016-2018)
  • Rear
  • Use: Normal
  • Capacity 0,96 liter
  • Check 20000 miles/ 24 months
  • Code: 0BO
  • A4 2.0 TFSI quattro (185 kW) (2016-2018)
  • Rear
  • Use: Normal
  • Capacity 0,67 liter
  • Check 20000 miles/ 24 months
  • Code: 0DB
  • S4 3.0 TFSI quattro (260 kW) (2016-2018)
  • From automatic
  • Use: Normal
  • Capacity 1 liter (Dry fill)
  • Capacity 0,9 liter (Service fill)
  • Check 20000 miles/ 24 months
  • S4 3.0 TFSI quattro (260 kW) (2016-2018)
  • Rear
  • Use: Normal
  • Capacity 0,95 liter
  • Check 20000 miles/ 24 months
  • Code: 0D3
  • S4 3.0 TFSI quattro (260 kW) (2016-2018)
  • Rear
  • Use: Normal
  • Capacity 0,85 liter
  • Check 20000 miles/ 24 months
  • Code: 0G2
  • S4 3.0 TFSI quattro (260 kW) (2016-2018)
  • Rear, outer sections
  • Use: Normal
  • Capacity 0,93 liter
  • Check 20000 miles/ 24 months
  • Code: 0D3

Additional Notes

  • Every configuration listed carries a check interval of 20,000 miles or 24 months under normal use conditions, applying uniformly across all A4 and S4 variants in the specifications.
  • The Audi A4 2.0 TFSI quattro (185 kW) rear differential lists two separate capacities — 0.96 liter and 0.67 liter — a pairing that recurs identically across the A4 40 TFSI quattro (150 kW) and A4 45 TFSI quattro variants, indicating two distinct fill points or chambers within the rear differential assembly rather than a single unified sump.
  • The smaller 0.67-liter figure across all A4 quattro rear differential entries represents a notably low volume, consistent with a secondary or auxiliary differential cavity rather than a primary gear housing.
  • The A4 45 TFSI quattro was offered in two output states within the covered period: 185 kW for 2018-2020 and 195 kW from 2020 onward. Despite the power difference, both share identical rear differential capacities of 0.96 liter and 0.67 liter, along with the same check interval.
  • The S4 3.0 TFSI quattro (260 kW) introduces a third differential location not present in A4 entries: a front differential described as "from automatic," referring to a differential unit integrated with or driven from the automatic transmission.
  • For the S4 3.0 TFSI quattro front differential sourced from the automatic transmission, a dry fill capacity of 1.0 liter and a service fill capacity of 0.9 liter are both specified. The 0.1-liter difference reflects residual fluid retained in the housing during a routine drain, which is a standard distinction between a fully disassembled overhaul fill and a standard fluid change.
  • The S4 rear differential specifications include three separate capacity values — 0.95 liter, 0.85 liter, and 0.93 liter — with the 0.93-liter figure specifically attributed to the outer sections. The outer sections designation points to side bearing carriers or end caps that hold fluid independently from the central differential cavity.
  • The S4 3.0 TFSI quattro (260 kW) rear differential capacities of 0.95 liter, 0.85 liter, and 0.93 liter are notably higher than the A4 quattro rear differential figures, which aligns with the S4 carrying a larger, higher-torque rear differential unit suited to the 260 kW output of the supercharged 3.0-liter engine.
  • The S4 3.0 TFSI quattro specifications are split into two entries — 2016-2018 and 2018 onward — yet all differential capacities and the 20,000-mile/24-month check interval remain unchanged between the two periods, indicating no mechanical revision to the differential system at that model year boundary.

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