Overview
The ZF 4651.125.010 INDUCTIVE SENSOR is a critical electronic component engineered for the WG100 series of ZF industrial transmissions. This OEM genuine part monitors rotational speed and position of internal shafts by generating a precise electrical signal without physical contact. Mounted directly into the transmission housing, it feeds real-time data to the control unit, ensuring optimal shift timing and clutch engagement. The SKU 4651.125.010 is factory-calibrated to ZF’s exacting tolerances, making it a direct replacement for failed units. When installed alongside the 4651101007 TRANSMISSION HOUSING, it forms the backbone of the WG100’s electronic monitoring system.
Symptoms of Failure
- Erratic gear engagement or delayed shifting — A failing inductive sensor sends intermittent or incorrect speed signals, causing the transmission control module to misjudge shift points, leading to harsh or delayed gear changes.
- Transmission slipping under load — When the sensor cannot accurately detect output shaft speed, the system may fail to apply proper clutch pressure, resulting in noticeable slipping during acceleration or uphill driving.
- Check transmission light or fault codes P0720-P0722 — The vehicle’s diagnostic system will log speed sensor circuit errors, often accompanied by a warning lamp on the dashboard, indicating the 4651.125.010 requires immediate replacement.
- Intermittent loss of cruise control or torque converter lockup — Without reliable speed data from the inductive sensor, the transmission may disable fuel-saving features like lockup clutch engagement, reducing fuel efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.125.010 |
| Type | Inductive Speed Sensor (2-wire) |
| Output Signal | AC sine wave (variable frequency) |
| Operating Voltage | 5–24 V DC |
| Housing Material | Stainless steel with thermoplastic overmold |
| Thread Size | M18 x 1.5 |
| Overall Length | 65 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 4651.125.010 |
| Sealing | IP67 rated (with 0634303928 O-RING) |
Compatibility
This inductive sensor is specifically designed for the ZF WG100 series transmission. Based on its design and signal characteristics, it is also compatible with the following ZF models that share the same sensor mounting architecture: WG180, WG200, and WG250. Always verify the sensor port location on your specific unit. The sensor interfaces directly with the 4651301029 HOUSING and the 4651301024 HOUSING in these transmissions, ensuring a secure fit and accurate signal pickup.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301029 | HOUSING | Sensor mounting bracket |
| 0634303928 | O-RING | Seals sensor-to-housing interface |
| 4651301024 | HOUSING | Secondary sensor support housing |
| 4651203002 | SCREEN SHEET | Oil filter mesh for lubrication circuit |
| 4651303005 | SCREEN SHEET | Fine filtration screen |
| 0636101032 | CAP SCREW | Fastener for housing assembly |
| 0630361028 | SEALING CAP | Protects unused sensor ports |
| 4475280060 | SCREW PLUG | Oil drain plug |
| 0634303312 | O-RING | Seal for plug or cap |
