Four Seasons 73791 HVAC Mode Door Actuator - Left

HVAC Mode Door Actuator Overview

Four Seasons 73791 is an HVAC mode door actuator built for climate control systems that use an arm-style linkage and a 5-pin electrical connection. It is a direct-fit replacement for select Audi Q7 and Volkswagen Touareg applications with floor-position fitment.

Key Features

• Arm-style door linkage for controlled HVAC air door movement.
• 5-terminal pin design for the correct electrical interface.
• 3 mounting ears for secure actuator attachment.
• HVAC air door actuator style for mode door control.
• Four Seasons part number 73791 for easy identification.

Detailed Description

Four Seasons 73791 is an HVAC mode door actuator used to control air distribution inside the climate system. It is engineered around an arm linkage, a 5-pin terminal layout, and a 3-ear mounting pattern to match the specified application. This part number 73791 is listed for 2007-2015 Audi Q7, left floor position, and 2004-2010 Volkswagen Touareg, left floor position. For buyers searching for an Audi Q7 HVAC mode door actuator or a Volkswagen Touareg HVAC air door actuator, this replacement follows the application-specific configuration needed for proper operation.

Four Seasons draws on more than 50 years of mobile A/C experience and states that its products are engineered and tested for dependable operation. If you are replacing a failed HVAC mode door actuator, 73791 provides a targeted solution for restoring air door movement in the affected climate control system.

What It Is Used For

• Restoring HVAC mode selection when air no longer routes correctly.
• Addressing inconsistent airflow between dash, floor, and defrost settings.
• Replacing a worn actuator that causes clicking or binding during operation.
• Correcting loss of response from the climate control air door system.
• Resolving actuator-related HVAC control faults in the specified vehicles.

Installation Notes and Tips

Verify the connector style, mounting ear layout, and door linkage before installation. Confirm the vehicle application and position match the listed fitment for 2007-2015 Audi Q7, left floor, and 2004-2010 Volkswagen Touareg, left floor. Compare the original actuator to part number 73791 to ensure the electrical and mechanical interfaces align before replacement.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation, backed by more than 50 years of mobile A/C experience. Part number 73791 is also referenced as 7L0907511AJ for the same application.