HVAC Auxiliary Mode Door Actuator

Reliable Airflow Control for 2007–2013 Acura MDX and 2009–2015 Honda Pilot

Restore the functionality of your rear climate control system with this premium HVAC Auxiliary Mode Door Actuator. Specifically engineered for the secondary heater box in Acura and Honda SUVs, this motor controls the distribution of air between the rear vents and floor ducts. If your rear passengers are unable to change where the air is blowing, or if you hear a persistent clicking sound from the rear quarter panel area, the internal gears of the original unit have likely failed.

This actuator is constructed with a high-torque electric motor and reinforced plastic housing to withstand the constant cycling of the climate control system. It is a direct-fit replacement designed to communicate seamlessly with the factory HVAC control module, ensuring your auxiliary system performs exactly as it did when it left the showroom.

Fitment Verification and Vehicle Applications

This actuator is designed for the Auxiliary (Rear) Mode Door position on the following models:

• Acura MDX: 2007, 2008, 2009, 2010, 2011, 2012, 2013.

• Honda Pilot: 2009, 2010, 2011, 2012, 2013, 2014, 2015.

• Critical Placement Note: This unit is for the Auxiliary/Rear HVAC unit. It is typically located behind the interior trim in the rear cargo area or center console (depending on specific model configuration) and is not interchangeable with the main dash-mounted mode actuators.

Technical Specifications and Attributes

• Function: Auxiliary Mode Door (Rear Airflow Distribution).

• Terminal Quantity: 7-Pin Configuration.

• Terminal Gender: Male.

• Terminal Type: Pin.

• Housing Material: High-Strength Composite Plastic.

• Fitment Type: Direct Replacement.

What’s in the Box

• (1) HVAC Auxiliary Mode Door Actuator Assembly

Industry Cross-Reference Numbers

• Honda / Acura: 79260STXA01, 79260-STX-A01

• Dorman - OE Solutions: 604-871

• Standard Motor Products: ADR4297 / ADS4297

• Four Seasons: 73308

• A-Premium: APBDA0316

• BWD: ADS4297

Installation and Technical Tips

• Diagnostic Verification: Before replacing, verify that the rear climate control panel is sending a signal. If the rear vents do not respond to commands but you can hear the motor "searching" or clicking, the actuator is the confirmed point of failure.

• Linkage Alignment: When removing the old unit, take note of the position of the plastic "arm" or cam. Ensure the vent door linkage on the HVAC box moves freely by hand. If the vent door is jammed, the resistance will quickly strip the gears of the new actuator.

• Calibration Process: Once the new actuator is plugged in, turn the vehicle to the "ON" position. Use the rear climate controls to cycle the airflow from floor to ceiling. This allows the HVAC module to learn the "stop" points of the new motor, preventing it from over-extending and damaging the internal gears.

• Electrical Connection: Inspect the 7-pin connector for any signs of corrosion or "pin fit" issues. A loose connection can cause the actuator to move erratically or fail to hold its position.