Acura RDX, TB1, TB2 (USA / CAN)

Coolant capacity & service interval

Acura RDX, TB1, TB2 (USA / CAN) models utilize coolant with capacities ranging from 6,3 to 9,1 liters. The data covers 4 configurations.

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

TypeSpecifications
RDX 2.3 Turbo (2011-2012)
  • Use: Normal
  • Capacity 9,1 liter (Dry fill)
  • Capacity 6,3 liter (Service fill)
RDX 2.3 Turbo SH-AWD (2011-2012)
  • Use: Normal
  • Capacity 8,4 liter (Dry fill)
  • Capacity 7 liter (Service fill)
RDX 2.3 Turbo (2007-2010)
  • Use: Normal
  • Capacity 9,1 liter (Dry fill)
  • Capacity 6,3 liter (Service fill)
RDX 2.3 Turbo SH-AWD (2007-2010)
  • Use: Normal
  • Capacity 9,1 liter (Dry fill)
  • Capacity 6,3 liter (Service fill)

Additional Notes

  • The Acura RDX TB1/TB2 2.3 Turbo cooling system carries a dry fill capacity of 9.1 liters, which represents the total volume required when filling a fully drained or rebuilt system from empty.
  • The service fill capacity of 6.3 liters on the 2.3 Turbo (2007-2010) reflects the amount of coolant needed during a routine drain-and-refill, where residual fluid remains in the block, heater core, and hoses after draining.
  • The 2007-2010 and 2011-2012 non-SH-AWD 2.3 Turbo configurations share identical dry fill and service fill figures of 9.1 liters and 6.3 liters respectively, indicating no cooling system capacity change between those model year groups.
  • The RDX 2.3 Turbo SH-AWD (2011-2012) carries a dry fill capacity of 8.4 liters, which is 0.7 liters lower than the 9.1-liter dry fill specified for the 2007-2010 SH-AWD variant of the same engine.
  • The service fill capacity on the 2011-2012 SH-AWD configuration rises to 7.0 liters, compared to 6.3 liters on the 2007-2010 SH-AWD, meaning a routine coolant service on the later SH-AWD model requires approximately 700 ml more fluid.
  • On the 2011-2012 SH-AWD variant, the gap between dry fill and service fill narrows to 1.4 liters, whereas the 2007-2010 SH-AWD shows a wider gap of 2.8 liters between the two capacity figures, reflecting a difference in how much coolant is retained after a standard drain.
  • All four configurations list a normal use condition, meaning the capacity figures apply to standard operating environments without a separate severe-duty interval or capacity distinction.

Other Systems