Overview
The ZF 4660.125.004 INDUCTIVE SENSOR is a critical electronic component designed for the WG 98 Series transmission. This OEM genuine part monitors rotational speed and position of internal shafts by generating a magnetic field that detects ferrous targets without physical contact. Installed directly into the transmission housing, the sensor sends real-time data to the transmission control unit (TCU) to manage shift timing and clutch engagement. The SKU 4660.125.004 ensures precise signal output, making it essential for maintaining smooth gear transitions in heavy-duty applications. When paired with a robust 4660101019: TRANSMISSION HOUSING, this sensor provides reliable feedback even under high vibration and temperature extremes.
Symptoms of Failure
- Erratic gear shifting or delayed engagement: A failing inductive sensor sends inconsistent speed signals, causing the TCU to misjudge shift points. This often results in harsh or delayed gear changes, especially under load.
- Transmission slipping or loss of power: When the sensor cannot detect shaft rotation accurately, the transmission may slip out of gear or fail to hold torque, leading to reduced drivability and increased fuel consumption.
- Check engine or transmission warning light: The TCU logs fault codes (e.g., P0715 or P0720) when the sensor signal is absent or out of range. This symptom often accompanies intermittent performance issues.
- No start or limp mode activation: A complete sensor failure can prevent the TCU from confirming the transmission is in neutral, locking the vehicle in a safe mode or preventing engine start altogether.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.125.004 |
| Type | Inductive Proximity Sensor (2-wire) |
| Operating Voltage | 10–30 V DC |
| Output Signal | Frequency/ Pulse (Hall-effect compatible) |
| Housing Material | Stainless Steel (AISI 303) with PTFE seal |
| Thread Size | M12 x 1.5 |
| Overall Length | 45 mm |
| Weight | 0.035 kg |
| OEM Reference | ZF 4660.125.004 |
| Operating Temperature | -40°C to +125°C |
| Protection Rating | IP67 |
Compatibility
This inductive sensor is engineered for the ZF WG 98 Series, which includes models such as the WG180, WG200, and WG250. It is also commonly used in the WG 98-2 and WG 98-3 variants found in off-highway trucks, loaders, and agricultural machinery. The sensor mounts directly into the 4660301056: HOUSING II and is secured with a 0631306174: CYLINDRICAL PIN to prevent rotation. Always verify the 0769123894: TYPE PLATE on your transmission to confirm exact model fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101019 | TRANSMISSION HOUSING | Main structural casing that encloses all internal components |
| 4660301056 | HOUSING II | Secondary housing that supports sensor and valve assemblies |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for precise sensor positioning |
| 0769123894 | TYPE PLATE | Identification plate with model and serial number |
| 0750100022 | SCREW PLUG | Seals unused sensor ports to prevent fluid leaks |
| 4660221031 | SUCTION TUBE | Draws oil from the sump to the pump |
| 0634100317 | O-RING | Seals the sensor-to-housing interface |
| 0636103273 | CAP SCREW | Fastens the sensor retaining bracket |
| 0634306311 | O-RING | Seals the housing cover plate |
| 4660321029 | FIXING PLATE | Locks the sensor in place against vibration |
