Overview
The ZF 4616.125.004 INDUCTIVE SENSOR is a precision electronic component engineered specifically for the WG 65 series transmission. This OEM genuine part monitors rotational speed and position of internal shafts by generating a magnetic field that detects metallic targets without physical contact. Mounted directly into the TRANSMISSION HOUSING, the sensor sends critical data to the transmission control unit to manage shift timing and clutch engagement. The SKU 4616.125.004 is the direct replacement for the original factory-installed sensor, ensuring exact electrical characteristics and thread fitment for reliable operation.
Symptoms of Failure
- Erratic shifting or gear hunting – When the inductive sensor fails, the transmission control unit loses accurate speed data, causing the transmission to shift unpredictably or constantly search for the correct gear.
- Delayed engagement or harsh shifts – A worn 4616.125.004 sensor can produce intermittent signals, leading to delayed clutch pack engagement and jarring gear changes during acceleration.
- Transmission warning light and limp mode – Faulty sensor readings trigger diagnostic trouble codes, forcing the transmission into a protective limp-home mode with reduced power and limited gear availability.
- No start condition or stalled output – Complete sensor failure prevents the control unit from detecting shaft rotation, which can inhibit engine start or cause the transmission to lose drive power entirely.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.125.004 |
| Type | Inductive Proximity Sensor |
| Thread Size | M12 x 1.5 |
| Housing Material | Stainless Steel / Nickel-Plated Brass |
| Operating Voltage | 10–30 V DC |
| Output Type | PNP Normally Open (NO) |
| Switching Frequency | ≤ 5 kHz |
| Protection Rating | IP67 |
| Weight | 0.04 kg (40 g) |
| OEM Reference | ZF 4616.125.004 |
Compatibility
This inductive sensor is primarily designed for the ZF WG 65 series, but its mounting pattern and electrical specifications also suit several other ZF off-highway transmissions. Compatible models include the WG65, WG80, WG100, WG120, WG150, WG180, and WG200 series. The sensor interfaces directly with the OUTPUT shaft assembly and the OUTPUT FLANGE to provide precise rotational feedback. Always verify the thread pitch and connector type against your transmission’s housing before installation. The sensor is secured using a HEXAGON SCREW that must be torqued to factory specifications to prevent oil seepage.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Main structural casing for internal components |
| 0636011038 | HEXAGON SCREW | Fastens sensor and housing components |
| 0636011118 | HEXAGON SCREW | Secures output flange to shaft |
| 0636016015 | HEXAGON SCREW | Mounts transmission housing sections |
| 0631306085 | CYLINDRICAL PIN | Aligns housing and flange during assembly |
| 0634313118 | O-RING | Seals sensor bore against oil leakage |
| 0732611049 | FILTER INSERT | Traps debris in hydraulic circuit |
| 0634303718 | O-RING | Seals output flange connection |
