Acura RDX, TB3, TB4 (USA / CAN)

Automatic transmission fluid capacity & service interval

Acura RDX, TB3, TB4 (USA / CAN) models require automatic transmission fluid with a capacity of 3,1 liters. Service intervals include changes at 30000 miles and 60000 miles. The data covers 8 configurations.

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

TypeSpecifications
RDX 3.5 i-VTEC V6 (2015-2018)
  • Use: Severe
  • Capacity 3,1 liter
  • Change 60000 miles
  • Code: 6/1
RDX 3.5 i-VTEC V6 (2015-2018)
  • Use: Flexible (on board maintenance system)
  • Capacity 3,1 liter
  • Code: 6/1
RDX 3.5 i-VTEC V6 (2015-2018)
  • Use: Severe, first change only
  • Capacity 3,1 liter
  • Change 30000 miles
  • Code: 6/1
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Severe
  • Capacity 3,1 liter
  • Change 30000 miles
  • Code: 6/1
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Severe, first change only
  • Capacity 3,1 liter
  • Change 60000 miles
  • Code: 6/1
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Flexible (on board maintenance system)
  • Capacity 3,1 liter
  • Code: 6/1
RDX 3.5 i-VTEC V6 (2012-2015)
  • Use: Normal
  • Capacity 3,1 liter
  • Code: 6/1
RDX 3.5 i-VTEC V6 AWD (2012-2015)
  • Use: Normal
  • Capacity 3,1 liter
  • Code: 6/1

Additional Notes

  • The Acura RDX TB3/TB4 3.5 i-VTEC V6 automatic transaxle holds 3.1 liters of fluid across all listed configurations, covering both front-wheel-drive and AWD variants from 2012-2018.
  • A 3.1-liter service fill capacity is consistent with a partial drain-and-refill procedure rather than a full overhaul flush, which would typically require a significantly larger volume to account for fluid retained in the torque converter and valve body passages.
  • For the 2015-2018 RDX 3.5 i-VTEC V6 AWD under severe use conditions, the first change is due at 30,000 miles, with subsequent changes following at 60,000-mile intervals, indicating a more aggressive initial flush schedule before settling into a longer recurring cycle.
  • The non-AWD 2015-2018 RDX 3.5 i-VTEC V6 under severe use conditions carries a 60,000-mile change interval, while the AWD variant under the same severe condition specifies 30,000 miles for ongoing changes after the first service, reflecting a shorter recurring interval for the AWD drivetrain.
  • The flexible interval tied to the on-board maintenance system applies to both the FWD and AWD 2015-2018 variants, with no fixed mileage figure listed, meaning the vehicle's monitoring system determines when a fluid change is due rather than a predetermined schedule.
  • No change interval is listed for the 2012-2015 RDX 3.5 i-VTEC V6 and 2012-2015 AWD variants under normal use conditions, with only the 3.1-liter capacity recorded in the specifications for those configurations.
  • The split between a 30,000-mile first change and a 60,000-mile subsequent interval for the 2015-2018 AWD severe use condition is a common practice in transmission service schedules, as the initial interval removes any residual manufacturing debris or early wear particles from the fluid circuit.

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