Acura RDX, TB3, TB4 (USA / CAN)

Differential fluid capacity & service interval

Acura RDX, TB3, TB4 (USA / CAN) models require differential fluid with a capacity of 1,25 liters. Service intervals include normal use and flexible use via the on board maintenance system. The data covers 2 configurations.

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

TypeSpecifications
  • RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Rear
  • Use: Flexible (on board maintenance system)
  • Capacity 1,25 liter
  • RDX 3.5 i-VTEC V6 AWD (2012-2015)
  • Rear
  • Use: Normal
  • Capacity 1,25 liter

Additional Notes

  • The rear differential capacity of 1.25 liters applies to the Acura RDX TB3/TB4 3.5 i-VTEC V6 AWD across both the 2012-2015 and 2015-2018 configurations, representing a service fill volume rather than a full overhaul or dry-fill quantity.
  • For the 2012-2015 3.5 i-VTEC V6 AWD, the rear differential fluid interval is governed by a normal use condition, meaning service is performed on a fixed, time- or mileage-based schedule rather than one adjusted for driving demands.
  • Beginning with the 2015-2018 3.5 i-VTEC V6 AWD, the rear differential fluid interval shifts to a flexible condition tied to the on-board maintenance system, which calculates service needs based on actual operating data collected by the vehicle's monitoring system rather than a predetermined fixed schedule.
  • The 1.25-liter rear differential capacity is consistent across both specification rows, indicating no change in the physical unit size or fill volume between the two generation variants covered in the 2012-2018 period.

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