Acura RDX, TC1, TC2 (USA / CAN)

Additional Notes

• Across all four configurations of the Acura RDX 2.0 i-VTEC, the cooling system overhaul capacity is rated at 8.7 liters, which reflects the total volume of the entire cooling circuit when fully drained and refilled, including the engine block, heater core, and all associated passages.
• The service fill capacity of 5.5 liters is notably lower than the overhaul figure, indicating that a routine coolant service does not evacuate the full system volume and leaves residual fluid in portions of the circuit that are not fully purged during a standard drain procedure.
• The 3.2-liter difference between the 8.7-liter overhaul capacity and the 5.5-liter service fill capacity is consistent across both the FWD and AWD variants, as well as across both the USA and CAN market configurations, for the 2.0 i-VTEC engine.
• Service intervals for all four configurations are governed by a flexible schedule tied to the on-board maintenance system, meaning coolant replacement is not triggered by a fixed mileage or time interval but rather by the vehicle's own monitoring logic.
• The CAN and USA market versions of the RDX 2.0 i-VTEC share identical cooling system capacities at both the overhaul and service fill levels, with no regional variation in the specified figures.
• The AWD configurations carry the same 8.7-liter overhaul and 5.5-liter service fill capacities as the FWD versions, indicating the addition of the all-wheel-drive system does not alter the cooling circuit volume for the 2.0 i-VTEC engine.