Command the airflow inside your cabin with the Four Seasons HVAC Mode Door Actuator 73728, the small electric motor that drives the mode door to direct air toward the vents, floor, or defrost outlets on your climate-control command. Cataloged as the LEFT-position actuator, it drops in as a direct-fit replacement for the listed Lexus applications, including the 2013-2020 GS350, 2016-2020 GS F, 2014-2015 IS250, 2023-2024 IS300/IS350, 2022-2024 IS500, and 2023-2024 RC300/RC350 — see the Buyer's Guide tab for the full list of covered models and engines.
- Complete as applicable: includes the lever arm, gear, cam gear, hardware, and linkage as applicable to the application.
- Internal build: quality internal motor, drive gears, electronics, and connections.
- Function-checked: tested for function, durability, and longevity.
- Backed by experience: supported by more than 50 years of mobile A/C know-how from Four Seasons.
If a failed actuator is the cause of a mode door that won't move — stuck on one outlet, a clicking or grinding behind the dash, or air that won't switch to defrost or floor — replacing this LEFT actuator restores its function. Diagnose the cause before ordering to confirm this is the faulty unit.
Interchange: ACT2078IM · BDAA1442 · 8710630570 · DA1666
This part cross-references / interchanges with the following part numbers:
ACT2078IM, 73728, BDAA1442, 8710630570, DA1666
