Dial in cabin comfort with the Four Seasons HVAC Blend Door Actuator (MPN 73703) — a direct-fit 1999-2003 Acura TL blend door actuator that also installs on the 1999-2003 Acura CL. This motor-driven actuator positions the blend door inside the HVAC case to control how much air is routed across the heater core, managing your temperature and airflow mix.
- Includes: lever arm, gear, cam gear hardware and linkage as applicable.
- Internal build: quality internal motor, drive gears, electronics and connections.
- Tested: checked for function, durability and longevity.
- Fit: meets or exceeds OE specifications for fit and function.
Signs the original may need replacing include a clicking or knocking noise behind the dash, temperature stuck on hot or cold, or inconsistent temperature blending. If a failed blend door actuator is the cause, this FOUR SEASONS blend door actuator replaces it. Diagnose the cause before ordering, since these symptoms can also come from the blend door, wiring, or HVAC control head.
Fits the 1999-2003 Acura CL and 1999-2003 Acura TL. See the "Vehicles it fits" section for the full engine-level application details.
Interchange: 79160S0KA01 · ACT2052IM · BDAH1099 · DA1641
This part cross-references / interchanges with the following part numbers:
79160S0KA01, ACT2052IM, 73703, BDAH1099, DA1641
Frequently Asked Questions
What does the Four Seasons 73703 blend door actuator do?
It's a motor-driven actuator that positions the blend door in the HVAC case, controlling how much air passes across the heater core to set your cabin temperature and airflow mix.
Does this fit my 1999-2003 Acura TL?
Yes. This actuator is a direct-fit application for the 1999-2003 Acura TL, and also fits the 1999-2003 Acura CL. Check the "Vehicles it fits" section to confirm your exact vehicle.
What comes with the actuator?
It includes the lever arm, gear, cam gear hardware and linkage as applicable, along with a quality internal motor, drive gears, electronics and connections.
What are the signs of a failing blend door actuator?
Common signs include clicking or knocking behind the dash, temperature stuck on hot or cold, or inconsistent blending. These can have other causes, so diagnose before replacing.
What part numbers does the 73703 replace?
It cross-references 79160S0KA01, ACT2052IM, BDAH1099, and DA1641. Compare your original number and confirm fitment for your vehicle before ordering.
