VW / Audi 2-Pin 6.3mm Fan / Brake Pump Waterproof Connector – OEM 3B0973852A / 3B0973752A
Direct OEM-specification replacement for the Tyco / TE Connectivity 2-pin waterproof wire harness connector used on cooling fans and brake pump (ABS pump) circuits across Volkswagen and Audi platforms. Cross-references VW / Audi OEM part numbers 3B0973852A and 3B0973752A (also written as 3B0 973 852A and 3B0 973 752A). Uses the 6.3mm contact series in brown nylon housing with waterproof sealing — the 6.3mm series is the standard high-current connector for cooling fan motors and ABS brake pump motors on VW Group vehicles.
The 6.3mm 2-pin connector is used on two safety-critical circuits on VW and Audi vehicles. As a cooling fan connector, a failed connection causes the cooling fan to stop operating, leading to engine overheating and potential head gasket failure. As a brake pump (ABS pump) connector, a failed connection disables the ABS system, illuminating the ABS warning light and producing C0031–C0051 fault codes. The 6.3mm terminal is prone to fretting corrosion under vibration, causing high-resistance connections that are difficult to diagnose without connector inspection.
| OEM Number | Type | Application |
|---|---|---|
| 3B0973852A | Female (socket) housing | VW/Audi 6.3mm 2-pin female — harness side |
| 3B0973752A | Male (plug) housing | VW/Audi 6.3mm 2-pin male — component side |
| Attribute | Detail |
|---|---|
| Pin Count | 2-Pin |
| Contact Series | 6.3mm pitch (high-current series) |
| Housing Material | Nylon, brown |
| Sealing | Waterproof |
| Current Rating | High-current (fan motor and pump motor applications) |
| OEM Part Numbers | 3B0973852A / 3B0973752A |
| Applications | Cooling fan motor, ABS brake pump motor, radiator fan |
| Compatible Brands | Volkswagen, Audi (Tyco/TE 6.3mm platform) |
| Terminal Included | Yes |
Q: My VW Passat is overheating and the cooling fan is not running — could it be the connector?
A: Yes. A corroded or open 6.3mm fan connector is a common cause of cooling fan failure on VW Group vehicles. Test the fan motor directly with 12V before replacing it — if the motor runs, the fault is in the connector or wiring (OEM 3B0973852A).
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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2 Pin Connectors
