BMW 4 series Convertibe, G23 / G83 (USA)

Differential fluid capacity & service interval

BMW 4 series Convertibe, G23 / G83 (USA) differential fluid capacity ranges from 0,6 liter to 1 liter. The data covers 8 configurations.

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

TypeSpecifications
  • 430i Convertible (2024- )
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Code: 190AL
  • 430i Convertible (2024- )
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Code: 215 LWS SA2T4
  • 430i xDrive Convertible (2024- )
  • Rear
  • Use: Normal
  • Capacity 0,8 liter
  • Code: 190AL
  • 430i xDrive Convertible (2024- )
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Code: 215 LWS SA2T4
  • M440i Mild-Hybrid xDrive Convertible (2024- )
  • Front
  • Use: Normal
  • Capacity 0,6 liter
  • Code: 170AL
  • M440i Mild-Hybrid xDrive Convertible (2024- )
  • Front
  • Use: Normal
  • Capacity 0,6 liter
  • Code: 170AL
  • M440i Mild-Hybrid xDrive Convertible (2024- )
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • M4 Competition xDrive Convertible (2021-2024)
  • Front
  • Use: Normal
  • Capacity 0,6 liter
  • Code: 170AL

Additional Notes

  • The BMW 4 Series Convertible G23/G83 rear differential specifications list two distinct capacity values for the 430i Convertible: 0.8 liter and 1 liter. A dual-capacity listing of this kind typically reflects a service fill level versus a total overhaul or dry fill capacity, meaning the amount of fluid required depends on whether the housing is being partially or fully drained.
  • The same two rear differential capacity figures, 0.8 liter and 1 liter, appear identically for the 430i xDrive Convertible, indicating the rear differential housing carries the same fill characteristics regardless of whether the drivetrain is rear-wheel drive or all-wheel drive.
  • The M4 Competition xDrive Convertible, covering model years 2021-2024, carries a front differential with a rated capacity of 0.6 liter. A front differential is present on xDrive variants because all-wheel drive requires a separate gear assembly at the front axle to distribute torque to the front wheels.
  • The M440i Mild-Hybrid xDrive Convertible front differential capacity is also listed at 0.6 liter, matching the figure recorded for the M4 Competition xDrive Convertible front unit. Both entries share the same normal use condition.
  • The M440i Mild-Hybrid xDrive Convertible rear differential is specified at 1 liter under normal use conditions, which aligns with the higher of the two capacity values listed for the 430i rear differential, suggesting a comparable rear differential housing size across multiple G23/G83 configurations.
  • All differential fluid entries across the 4 Series Convertible G23/G83 specifications are assigned a normal use condition, with no severe-use interval or capacity variant recorded for any of the listed configurations.

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