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Four Seasons 73751 HVAC Mode Door Actuator - Right
| Brand | Four Seasons 73751 |
|---|---|
| Position | Right |
| Door Linkage | Cam |
| Mounting Ear Qty. | 4 |
| Style | Hvac air door actuator |
| Terminal Pin Qty. | 7 |
| Fits | INFINITI · 19 vehicles |
Cam linkage. Supports controlled HVAC air-door movement with a direct-fit actuator design.
7-pin connection. Uses a 7-terminal electrical layout for the correct system interface.
Four Seasons 73751. Backed by more than 50 years of mobile A/C experience.
Cross-references Four Seasons 73751, 277311ME0A and MT18982 for the same application. See all 3.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
HVAC Mode Door Actuator Overview
Four Seasons 73751 is an HVAC mode door actuator for select INFINITI applications. It is built around a cam-style door linkage and a 7-pin electrical connection for controlled air-door movement in the climate system.
Key Features
- Cam-style HVAC air door actuator design
- 7-terminal pin configuration for the electrical connection
- 4 mounting ears for secure installation
- Direct replacement part number 73751
- Cross-references 277311ME0A and MT18982 for the same application
Detailed Description
This Four Seasons HVAC mode door actuator, part number 73751, is used to control air-door position inside the heating and air conditioning system. It is listed for select INFINITI Q70, Q70L, M35h, M37, and M56 applications, including right-side and lower-position fitments shown in the catalog data. The cam linkage and 7-pin layout support precise actuator operation where the original unit matches this configuration.
Four Seasons 73751 is a practical replacement for vehicles that need restored HVAC air distribution control. If your INFINITI Q70 or M56 has inconsistent vent direction, this actuator is the type of component used to restore proper mode-door movement.
What It Is Used For
- Restoring air direction control between dash, floor, and defrost outlets
- Addressing HVAC systems that stay stuck on one vent setting
- Replacing a worn actuator that no longer responds correctly
- Correcting irregular or delayed mode-door movement
Installation Notes and Tips
Verify the connector style, mounting ear layout, and door linkage type before installation. Confirm the catalog-listed position and notes for your exact vehicle application, since this part is shown for both right-side and lower-position use cases. Match the original actuator configuration to the vehicle’s HVAC housing before replacement.
Quality Assurance
Four Seasons states that its products are engineered and tested for long service life, backed by more than 50 years of mobile A/C experience.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2019 | INFINITI | Q70 | Right | — |
| 2019 | INFINITI | Q70L | Right | — |
| 2018 | INFINITI | Q70 | Right | — |
| 2018 | INFINITI | Q70L | Right | — |
| 2017 | INFINITI | Q70 | Right | — |
| 2017 | INFINITI | Q70L | N/A | Lower |
| 2016 | INFINITI | Q70 | N/A | Lower |
| 2016 | INFINITI | Q70L | N/A | Lower |
| 2015 | INFINITI | Q70 | N/A | Lower |
| 2015 | INFINITI | Q70L | N/A | Lower |
| 2014 | INFINITI | Q70 | Right | — |
| 2013 | INFINITI | M35h | Right | — |
| 2013 | INFINITI | M37 | Right | — |
| 2013 | INFINITI | M56 | N/A | Lower |
| 2012 | INFINITI | M35h | Right | — |
| 2012 | INFINITI | M37 | N/A | Lower |
| 2012 | INFINITI | M56 | Right | — |
| 2011 | INFINITI | M37 | N/A | Lower |
| 2011 | INFINITI | M56 | N/A | Lower |
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