Valeo 509784 HVAC Air Adjustment Control Motor

Valeo HVAC Air Adjustment Control Motor

The Valeo 509784 HVAC air adjustment control motor is an OE-style replacement for BMW climate control systems that use an air inlet door actuator. It helps regulate how air moves through the HVAC case so the cabin can maintain the selected temperature and airflow settings.

Built under the Valeo OE family, this actuator is a direct-fit service part for select BMW 228i, 328i GT xDrive, 335i GT xDrive, 428i, X3, X5, X6, and related models. The part number 509784 is also referenced for several BMW OE cross numbers and Four Seasons 73085.

Key Features

• Valeo HVAC actuator for air inlet door control
• OE supplier application for select BMW vehicles
• Valeo OE family part for factory-style fit and function
• Supports precise HVAC air direction and blend control
• Cross-references Four Seasons 73085 for the same application
• Part number: 509784

Product Details

This HVAC air adjustment control motor is used in BMW climate systems to move the air inlet door and manage how outside and recirculated air enters the HVAC case. On vehicles such as the BMW 228i, X3, and X5, a worn actuator can cause inconsistent vent operation, incorrect cabin temperature control, or door movement issues inside the HVAC housing. Valeo supplies this OE-family replacement to match the original application requirements.

Compatible With: 2014-2016 BMW 228i, 2015-2016 BMW 228i xDrive, 2014-2016 BMW 328i GT xDrive, 2014-2016 BMW 335i GT xDrive, 2014-2016 BMW 428i, 2014-2016 BMW 428i xDrive, 2014-2016 BMW 435i, 2014-2016 BMW 435i xDrive, 2014-2016 BMW M235i, 2015-2016 BMW M235i xDrive, 2015-2016 BMW M3, 2015-2016 BMW M4, 2016 BMW X1, 2011-2016 BMW X3, 2015-2016 BMW X4, 2009-2016 BMW Z4, 2008-2014 BMW X6, and 2007-2013 BMW X5.

Common Issues This Part May Address

• Air inlet door not responding to HVAC control changes
• Cabin airflow stuck on one vent or recirculation setting
• Temperature control inconsistency in the BMW HVAC system
• Clicking, binding, or failed actuator movement inside the HVAC case
• Loss of proper fresh-air and recirculation door operation

Installation Notes and Tips

Verify the original actuator part number and vehicle application before installation. Access to the HVAC case can vary by model, so compare the replacement unit to the removed part and confirm connector and mounting alignment before reassembly. After installation, cycle the climate controls to allow the HVAC system to relearn door positions if required by the vehicle.

Quality Assurance

Valeo is the OE supplier for this vehicle application, and the Valeo OE family is built to match original equipment expectations for fit and function. This part cross-references Four Seasons 73085 for the same application.