Overview
The ZF 0501.340.271 SPEED SENSOR is a critical electronic component designed to monitor rotational speed within the WG100, WG130, and WG131 transmission series. This OEM genuine part precisely detects gear rotation and relays real-time data to the transmission control unit, ensuring optimal shift timing and clutch engagement. The SKU 0501.340.271 is mounted directly into the valve body or housing assembly, where it interfaces with the rotating geartrain. Without accurate speed input from this sensor, the transmission cannot maintain proper hydraulic pressure modulation. For complete system integrity, this sensor often works alongside the 4699025039 GP25 control module and the 4699101113 HOUSING that encloses the electronic assembly.
Symptoms of Failure
- Erratic gear shifting or delayed engagement — A failing 0501.340.271 sensor sends intermittent or false speed signals, causing the transmission to hunt between gears or hesitate when shifting from neutral to drive.
- Transmission stuck in limp mode — When the control unit detects no valid speed signal, it defaults to a safe mode, limiting the vehicle to a single gear (usually 2nd or 3rd) to prevent internal damage.
- Inaccurate speedometer or tachometer readings — Since the sensor feeds data to the vehicle’s instrument cluster, a worn unit can cause the speedometer to drop to zero or fluctuate wildly while driving.
- Harsh or jarring downshifts — Without precise speed data from the sensor, the transmission may apply clutch pressure too aggressively during deceleration, resulting in noticeable jolts.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0501.340.271 |
| Sensor Type | Inductive / Hall-effect speed sensor |
| Housing Material | Reinforced thermoplastic with metal insert |
| Overall Length | 72 mm |
| Thread Size | M14 x 1.5 |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +150°C |
| Output Signal | Square wave (frequency proportional to speed) |
| Connector Type | 2-pin Deutsch DT04-2P |
| OEM Reference | ZF 0501.340.271 (genuine) |
Compatibility
This ZF 0501.340.271 speed sensor is specifically engineered for the following transmission models: WG100, WG130, and WG131. It is also compatible with select variants of the WG180 and WG200 series that share the same valve body architecture. The sensor is not interchangeable with older WG series units (WG50, WG65) due to different mounting thread patterns. When replacing this sensor, always inspect the mating 4699102157 INPUT shaft and the 4699103114 OUTPUT shaft for wear, as debris from damaged shafts can accelerate sensor failure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699025039 | GP25 | Transmission control module for shift logic |
| 4699101113 | HOUSING | Enclosure for electronic sensor and wiring |
| 4699102157 | INPUT | Input shaft assembly for torque transfer |
| 4699103114 | OUTPUT | Output shaft delivering power to driveline |
| 4699109068 | BRAKE PARTS | Internal brake components for gear holding |
| 4699301201 | HOUSING | Main transmission housing structure |
| 4699309202 | HOUSING COVER | Sealing cover for transmission housing |
| 0636101477 | CAP SCREW | Fastener for securing sensor bracket |
| 0631302221 | CYLINDRICAL PIN | Alignment pin for sensor positioning |
| 0501319149 | SCREW PLUG | Sealing plug for sensor port |
