3C0-907-521F Radiator Fan Control Module for VOLKSWAGEN GOLF GTI
Item: Radiator Fan Control Module
Product Reference: 6604021
Primary Part Number: 3C0-907-521F
Listed Application: AUDI A3 | AUDI Q7 | VOLKSWAGEN GOLF GTI | VOLKSWAGEN JETTA | VOLKSWAGEN PASSAT
Configuration: Supplied in the photographed product configuration
Selection Features: Provide VIN data and diagnostic context when multiple fan control modules are listed for the same model.
Pre-Shipment Check: The module receives a visible configuration check; internal vehicle operation must be verified after correct installation.
MOQ: From 5 pieces
Packaging: Neutral or customized packaging available
Typical Delivery: 30–45 days, subject to quantity and destination
Fitment Check: Provide VIN data and diagnostic context when multiple fan control modules are listed for the same model.
AUDI A3 | AUDI Q7 | VOLKSWAGEN GOLF GTI | VOLKSWAGEN JETTA | VOLKSWAGEN PASSAT Radiator Fan Control Module
For global auto-parts procurement, this Radiator Fan Control Module is supplied with OE or application review based on the available catalogue evidence.
Part-Reference Snapshot
- Component: Radiator Fan Control Module
- Primary OE: 3C0-907-521F
- Cross references: No additional confirmed cross-reference is listed.
- Application: AUDI A3 | AUDI Q7 | VOLKSWAGEN GOLF GTI | VOLKSWAGEN JETTA | VOLKSWAGEN PASSAT
- YoonShan product no.: 6604021
- Configuration: Match the product photographs on this page
Before You Place an Order
Provide VIN data and diagnostic context when multiple fan control modules are listed for the same model.
Check vehicle year, engine or equipment variant and production information together with the original module reference.
System-Service Context
Cooling-fan control depends on the module working with sensors, wiring, relays, power supply and the vehicle command network.
Electronic components should not be replaced solely from visual appearance or a single symptom.
Intermittent operation may be caused by connector corrosion, loose terminals or harness movement, so inspect the full circuit.
Product and Installation Verification
Dispatch control focuses on label reference, plug keying, casing and installation features visible without opening the module.
Confirm connectors are fully locked and wiring is routed away from the fan, exhaust heat and sharp edges.
Product Technical Specifications
| Product type | Radiator Fan Control Module |
|---|---|
| Primary OE reference | 3C0-907-521F |
| Cross-reference numbers | No additional confirmed cross-reference |
| Internal item code | 6604021 |
| Vehicle brand | VOLKSWAGEN |
| Vehicle model | GOLF GTI |
| Model year | Confirm by vehicle application |
| Installation position | Vehicle cooling-fan control circuit / specified mounting location |
| Product function | Controls or switches cooling-fan operation within the compatible vehicle electrical system |
Packaging, MOQ and Delivery
Neutral packaging is available, while qualified custom packing can be discussed for suitable order volumes.
A 12-month warranty applies under agreed supply terms, with packaging and dispatch details stated before the order proceeds.
Buyer Questions
Why should the fan motor be tested first?
A seized or high-current motor can overload the control circuit and damage replacement electronics.
What is checked before shipment?
Reference, connector, pins, casing and visible mounting condition are reviewed before packing.
What should I provide for a quotation?
Send OE number, module label photos, vehicle details, quantity and destination.
Is professional diagnosis recommended?
Yes. Cooling-fan controllers operate in high-current, vehicle-specific electrical systems.
Request a Quote: Submit the parts list and destination for consolidated sourcing assistance.
