Overview
The ZF 0501.208.792 PULSE SENSOR is a critical electronic component engineered for precise rotational speed monitoring within the WG250, WG260, and WG310 transmission series. This OEM genuine part mounts directly into the TRANSMISSION HOUSING to detect gear rotation and relay real-time data to the transmission control unit. By converting mechanical motion into electrical signals, the sensor ensures accurate shift timing and clutch modulation. The SKU 0501.208.792 is factory-calibrated to ZF specifications, guaranteeing seamless integration with the HOUSING assembly and the COVER unit. This part is secured using a HEXAGON SCREW during installation, which must be torqued to factory standards to prevent signal interference.
Symptoms of Failure
- Erratic gear shifting or delayed engagement — A failing pulse sensor sends inconsistent RPM data, causing the transmission to hunt for gears or hesitate during acceleration.
- Intermittent loss of speedometer signal — When the 0501.208.792 degrades, the vehicle may display a flashing or zero speed reading, often accompanied by a check engine light.
- Transmission slipping under load — Worn internal magnets or cracked housing allow oil contamination, leading to false pulse counts and clutch pack slippage during uphill climbs.
- Hard fault codes (e.g., P0720 or P0722) — Diagnostic scans will reveal output speed sensor circuit errors, directly traceable to a compromised 0501.208.792 pulse sensor.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.208.792 |
| Type | Variable Reluctance Pulse Sensor |
| Overall Length | 68.5 mm |
| Thread Size | M14 x 1.5 |
| Housing Material | Zinc-Plated Steel with PTFE Seal |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.208.792 |
| Operating Temperature | -40°C to +150°C |
| Output Signal | AC Sine Wave (0.5V–30V peak-to-peak) |
Compatibility
This pulse sensor is factory-specified for the following ZF transmission models: WG180, WG200, WG250, WG251, WG260, WG310, and WG311. It is also backward-compatible with select WG150 variants when paired with the correct COVER SHEET (part 4646301102). For WG260 applications, always verify the COVER SHEET (4646301235) is present to prevent oil ingress. The sensor bore in the TRANSMISSION HOUSING must be clean and free of burrs before installation. Use a GROOVED STUD (0631311009) for alignment if the original mounting point is stripped.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101029 | TRANSMISSION HOUSING | Main structural casing housing all rotating assemblies |
| 4646301090 | HOUSING | Secondary housing for valve body and sensor mounting |
| 4646301087 | COVER | Seals the sensor cavity against debris and moisture |
| 0636015304 | HEXAGON SCREW | Fastener for securing the pulse sensor to the housing |
| 0636101828 | CAP SCREW | High-tensile bolt for transmission cover retention |
| 4646301102 | COVER SHEET | Thin gasket for sealing sensor access port |
| 4646301235 | COVER SHEET | Reinforced gasket for WG260 high-pressure zones |
| 0730365067 | TYPE PLATE | Identification tag with transmission serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for precise sensor positioning |
| 0636101193 | CAP SCREW | M8 bolt for securing the type plate to the housing |
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