Take control of where your cabin air goes with the Four Seasons Mode Door Actuator 73729 — the small electric motor that repositions the HVAC mode door so your climate system can route air to the vents, floor, or defrost as commanded. It drops in as a direct-fit replacement for the 2007-2012 Lexus LS460 and the 2008-2012 Lexus LS600 and LS600H, and covers the MAIN mode-door position.
When this actuator fails, airflow can get stuck on one outlet, refuse to switch modes, or produce a clicking or knocking sound behind the dash as the internal gears skip. Replacing the worn unit restores motorized movement of the mode door.
Complete drive assembly: includes the lever arm, gear, cam gear hardware, and linkage as applicable.
Quality internals: internal motor, drive gears, electronics, and connections.
Verified: tested for function, durability, and longevity.
OE-matched: made to match the original part's fit and function.
Backed by Four Seasons' decades of mobile A/C experience.
This part cross-references / interchanges with the following part numbers:
ACT2079IM, 73729, BDAA1443, 8710650400, DA1667
Frequently Asked Questions
What does this HVAC mode door actuator do?
It's the electric motor that moves the mode door inside the HVAC case, directing airflow to the vents, floor, or defrost based on signals from your climate control.
Which vehicles does the 73729 fit?
It's a direct-fit replacement for the 2007-2012 Lexus LS460 and the 2008-2012 Lexus LS600 and LS600H. See the Buyer's Guide tab to confirm your vehicle.
What position does this actuator cover?
It covers the MAIN mode-door position in the HVAC system.
What are signs this actuator may need replacing?
Airflow that won't switch between vents, floor, or defrost, air stuck on one outlet, or a repeated clicking or knocking noise behind the dash can point to a worn actuator.
What comes with the actuator?
It includes the lever arm, gear, cam gear hardware, and linkage as applicable, along with the internal motor, drive gears, electronics, and connections.
HVAC Air Door ActuatorOur products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Four...
HVAC Air Door ActuatorOur products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Four...
HVAC Air Door ActuatorOur products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Four...
Route cabin air to the right outlets and clear a fogged windshield with the Four Seasons HVAC Defrost Mode Door Actuator / HVAC Mode Door Actuator (MPN 73598). This small electric actuator drives the...
HVAC Air Door ActuatorOur products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Four...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
