Overview
The ZF 0501.209.351 SPEED SENSOR is an OEM genuine component engineered for the WG100, WG130, and WG131 transmission series. This precision sensor monitors the rotational speed of the output shaft, sending critical data to the transmission control unit to regulate shift timing and torque converter lockup. As a direct replacement for the original factory part, the SKU 0501.209.351 ensures accurate signal transmission and seamless integration with your existing electronics. The sensor mounts directly into the 2095101022: TRANSMISSION HOUSING or the 2095301025: TRANSMISSION HOUSING, where it interfaces with the gear train to deliver real-time feedback.
Symptoms of Failure
When the 0501.209.351 speed sensor begins to degrade, operators often notice erratic shifting or delayed engagement between gears. A common failure symptom is the transmission slipping out of gear under load, particularly during uphill climbs or heavy hauling. Another frequent issue is a complete loss of speedometer or tachometer function, as the sensor fails to relay rotational data to the dashboard. Additionally, you may experience harsh or abrupt downshifts, which can accelerate wear on the 4475280150: SCREW PLUG and 0634304731: O-RING seals if left unaddressed. If your vehicle exhibits any of these issues, inspect the sensor and its mounting point in the transmission housing immediately.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0501.209.351 |
| Sensor Type | Inductive (Variable Reluctance) |
| Housing Material | Stainless Steel with Thermoplastic Overmold |
| Overall Length | 72.5 mm |
| Thread Size | M14 x 1.5 |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +150°C |
| Output Signal | Sine Wave (AC) |
| Sealing Method | Integrated O-Ring (Replaces 0634304731: O-RING) |
Compatibility
This speed sensor is specifically validated for ZF WG100, WG130, and WG131 transmission models. It is also compatible with the WG180 and WG200 series when used in output shaft speed monitoring applications. Always verify the sensor port location on your specific transmission housing—the 2095101022: TRANSMISSION HOUSING and 2095301025: TRANSMISSION HOUSING are the two primary variants that accept this sensor. For installations requiring a new seal, pair this sensor with the 0634304731: O-RING to prevent fluid ingress.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095101022 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 2095301025 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4475280150 | SCREW PLUG | Seals access ports in the housing |
| 0634304731 | O-RING | Provides hydraulic seal for sensor and plugs |
| 0636011207 | HEXAGON SCREW | Fastens housing sections together |
| 0636011188 | HEXAGON SCREW | Secures valve body and cover plates |
| 0730365280 | TYPE PLATE | Identification tag for transmission model |
| 0501337897 | SPEED SENSOR | Alternate sensor variant for input shaft |
| 0636101027 | CAP SCREW | Closes hydraulic circuit ports |
| 0631306155 | CYLINDRICAL PIN | Aligns housing halves during assembly |
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