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Four Seasons 37479 Engine Cooling Fan Temperature Switch
| Brand | Four Seasons 37479 |
|---|---|
| Connector Shape | Round |
| Terminal Quantity | 2 |
| Connector Gender | Male |
| Description | Switch-temp /eng/rad mount |
| Meets / Exceeds OEM? | Yes |
| Mnt Sys Loc | Eng/rad mounted |
| Style | Temperature |
| Temperature On | 185 |
| Type | Cooling fan |
| Product line | Temperature Switch |
| Fits | Audi and Volkswagen · 37 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable cooling control.
Temperature switch. Turns the cooling fan on at 185 degrees for precise operation.
Round connector. Male 2-terminal design for a straightforward electrical connection.
Cross-references Four Seasons 37479, A03879 and SW1799 for the same application. See all 3.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Engine Cooling Fan Temperature Switch Overview
Four Seasons 37479 is an engine cooling fan temperature switch for engine or radiator mounting applications. It uses a round male connector with 2 terminals and switches the cooling fan on at 185 degrees for direct temperature-based fan control.
Compatible with select Audi and Volkswagen applications, including Audi 80, Audi 80 Quattro, Audi 100, Audi 100 Quattro, Audi Coupe Quattro, Audi 5000 Quattro, Audi 4000, Audi 4000 Quattro, Audi Coupe, and Volkswagen Quantum.
Key Features
- Four Seasons Temperature Switch line
- Part number 37479
- Engine cooling fan temperature switch
- Round connector shape with male terminals
- 2-terminal electrical connection
- Engine/radiator mounted design
- Temperature on point: 185 degrees
- Meets or exceeds OEM requirements
Product Details
This Four Seasons temperature switch is built for temperature-triggered cooling fan operation in older Audi and Volkswagen cooling systems. It is used in cylinder head-mounted and engine/radiator-mounted locations depending on application, and the fitment data includes Audi 80 and 80 Quattro from 1988-1992, Audi 100 and 100 Quattro from 1989-1991, Audi Coupe Quattro from 1990-1991, Audi 5000 Quattro from 1987-1988, Audi 4000 and 4000 Quattro from 1985-1987, Audi Coupe from 1981-1983 and 1984-1987, and Volkswagen Quantum from 1987-1988. Four Seasons 37479 is a direct-fit style replacement for vehicles that use a 185-degree fan switch signal.
This part cross-references A03879 and SW1799 for the same application.
What It Helps Resolve
- Cooling fan not switching on at the correct temperature
- Fan cycling issues caused by a failed temperature switch
- Overheating concerns related to delayed fan activation
- Intermittent fan operation from worn electrical contacts
- Temperature signal loss at the cylinder head or radiator mount
Installation Notes and Tips
- Verify connector shape, terminal count, and mounting location before installation.
- Confirm the vehicle uses a 185-degree fan switch specification.
- Check the cylinder head or radiator mounting point for thread and sealing condition.
- Inspect the cooling fan circuit and related wiring if the original switch failed from electrical damage.
- Use the exact vehicle fitment listing for Audi and Volkswagen applications before ordering.
Quality Assurance
Four Seasons lists this temperature switch as meeting or exceeding OEM requirements, making it a specification-based replacement for the listed Audi and Volkswagen cooling fan applications.
| Year | Make | Model | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1992 | Audi | 80 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1992 | Audi | 80 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1991 | Audi | 100 | — | — | — | N/A | Temperature Switch |
| 1991 | Audi | 100 Quattro | AWD | — | — | N/A | Temperature Switch |
| 1991 | Audi | 80 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1991 | Audi | 80 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1991 | Audi | Coupe Quattro | — | — | — | N/A | Temperature Switch |
| 1990 | Audi | 100 | — | — | — | N/A | Temperature Switch |
| 1990 | Audi | 100 Quattro | AWD | — | — | N/A | Temperature Switch |
| 1990 | Audi | 80 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1990 | Audi | 80 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1990 | Audi | Coupe Quattro | — | — | — | N/A | Temperature Switch |
| 1989 | Audi | 100 | — | — | — | N/A | Temperature Switch |
| 1989 | Audi | 100 Quattro | AWD | — | — | N/A | Temperature Switch |
| 1989 | Audi | 80 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1989 | Audi | 80 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1988 | Audi | 5000 Quattro | AWD | 2.3L | L5 | N/A | Temperature Switch |
| 1988 | Audi | 5000 Quattro | AWD | 2.2L | L5 | N/A | 2 Term.; Located in Cylinder Head; Temperature Switch |
| 1988 | Audi | 80 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1988 | Audi | 80 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1988 | Volkswagen | Quantum | — | — | — | N/A | Temperature Switch |
| 1987 | Audi | 4000 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1987 | Audi | 4000 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1987 | Audi | 5000 Quattro | AWD | 2.3L | L5 | N/A | Temperature Switch |
| 1987 | Audi | 5000 Quattro | AWD | 2.2L | L5 | N/A | 2 Term.; Located in Cylinder Head; Temperature Switch |
| 1987 | Audi | Coupe | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1987 | Volkswagen | Quantum | — | — | — | N/A | Temperature Switch |
| 1986 | Audi | 4000 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1986 | Audi | 4000 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1986 | Audi | Coupe | — | — | — | N/A | White; Located in Cylinder Head; Temperature Switch |
| 1985 | Audi | 4000 | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1985 | Audi | 4000 Quattro | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1985 | Audi | Coupe | — | — | — | N/A | White; Located in Cylinder Head; Temperature Switch |
| 1984 | Audi | Coupe | — | — | — | N/A | White; Located in Cylinder Head; Temperature Switch |
| 1983 | Audi | Coupe | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1982 | Audi | Coupe | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
| 1981 | Audi | Coupe | — | — | — | N/A | Located in Cylinder Head; Temperature Switch |
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