Overview
The ZF 4661.125.005 INDUCTIVE SENSOR is a precision electronic component engineered for the WG 94 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 relays critical data to the 6073003014: CONTROL UNIT to regulate shift timing and torque converter lockup. The SKU 4661.125.005 ensures exact fitment and signal accuracy for WG94 gearboxes, replacing worn units that compromise drivetrain performance.
Symptoms of Failure
- Erratic gear engagement or slipping: A failing 4661.125.005 sensor sends intermittent or false speed signals, causing the control unit to misjudge shift points. Drivers may notice harsh upshifts or delayed downshifts under load.
- Transmission warning light illumination: When the inductive sensor fails to detect shaft rotation, the system logs a fault code. This often triggers a dashboard warning and forces the transmission into limp-home mode.
- No start or stall conditions: If the sensor provides no signal, the control unit may prevent engine start or cause stalling at low speeds, as it cannot confirm the transmission is in neutral.
- Incorrect speedometer or tachometer readings: Since the sensor feeds data to the vehicle’s instrumentation, a degraded unit can cause erratic gauge behavior, especially during deceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.125.005 |
| Type | Inductive Proximity Sensor |
| Housing Material | Nickel-Plated Brass |
| Thread Size | M12 x 1.5 |
| Overall Length | 55 mm |
| Weight | 0.04 kg |
| Operating Voltage | 10–30 V DC |
| Output Type | PNP Normally Open |
| OEM Reference | ZF 4661.125.005 |
| Protection Rating | IP67 |
Compatibility
This sensor is specifically designed for the ZF WG 94 series, including models WG94, WG180, and WG200. It is also used in select WG150 and WG250 variants where the same inductive pickup configuration is employed. Always verify the mounting thread and connector orientation against your existing unit before installation. The sensor interfaces directly with the 4661101033: HOUSING and 4661301096: HOUSING components that secure it within the transmission case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656183202 | LOOSE PARTS | Hardware kit for sensor mounting |
| 6073003014 | CONTROL UNIT | Processes sensor signals for shift logic |
| 4661101033 | HOUSING | Front housing section for sensor installation |
| 4661301096 | HOUSING | Rear housing section for sensor alignment |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for sensor bracket |
| 0769123894 | TYPE PLATE | Identification label for transmission series |
| 0750100022 | SCREW PLUG | Seals unused sensor port |
| 4660201008 | SCREW PLUG | Oil drain plug for housing |
| 0636100117 | SCREW PLUG | Threaded plug for pressure port |
| 0501211384 | VALVE | Modulates hydraulic pressure to clutch packs |
