Keep cabin airflow and temperature blending under proper control with the Four Seasons HVAC Blend Door Actuator (MPN 73708). This compact electric actuator drives the blend/air door inside the HVAC case, moving it to the commanded position so the climate system can direct and mix cabin air as designed. It installs as a direct-fit replacement for the 2017-2022 Hyundai Ioniq, 2017-2022 Kia Niro, and 2019-2022 Kia Niro EV, serving the auxiliary door position on the listed applications.
Four Seasons builds this hvac blend door actuator to match the fit and function of the original unit, so it drops into the factory location, and it's backed by decades of mobile A/C experience.
- Quality internals: internal motor, drive gears, electronics and connections.
- Includes: lever arm, gear, cam gear hardware and linkage as applicable.
- Tested: checked for function, durability and longevity.
Signs the original actuator may need replacing include a clicking or knocking noise behind the dash, air that won't change temperature, or a door that won't move to the commanded setting — if a failed actuator is the cause, this replaces it.
Interchange: ACT2057IM · BDAD1391 · 97124G2000 · DA1646
This part cross-references / interchanges with the following part numbers:
ACT2057IM, 73708, BDAD1391, 97124G2000, DA1646
Frequently Asked Questions
What does the Four Seasons 73708 do?
It's an electric actuator that drives the HVAC blend/air door inside the climate-control case, moving it to the commanded position so the system can direct and mix cabin air.
Which vehicles does this actuator fit?
It's a direct-fit replacement for the 2017-2022 Hyundai Ioniq, 2017-2022 Kia Niro, and 2019-2022 Kia Niro EV. Check the "Vehicles it fits" section to confirm your vehicle.
What are the signs this actuator may need replacing?
Common signs include a clicking or knocking noise behind the dash, air that won't change temperature, or a blend door that won't move to the selected setting.
What's included with this 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.
Where is this actuator located?
This is the auxiliary door actuator position for the listed applications; consult the vehicle service information for its exact location before installing.
