Overview
The ZF 4616.125.012 INDUCTIVE SENSOR is a precision electronic component engineered for the WG 65 Series transmission. This OEM genuine part monitors rotational speed and position of the drivetrain components, sending critical data to the transmission control unit (TCU) for precise shift timing and clutch modulation. Located within the valve body or housing assembly, the sensor detects ferrous targets on rotating shafts without physical contact. The SKU 4616.125.012 ensures exact fitment and signal integrity, preventing erratic shifting or transmission limp mode. When paired with a properly sealed TRANSMISSION HOUSING, this sensor maintains reliable operation under high-vibration conditions.
Symptoms of Failure
- Erratic or delayed gear engagement: A failing inductive sensor sends inconsistent speed signals, causing the TCU to hesitate or skip gears during acceleration.
- Transmission stuck in limp mode: When the sensor fails completely, the system defaults to a single gear (often 3rd) to protect internal components, triggering a warning light.
- Harsh or clunky shifting: Incorrect input data leads to abrupt clutch application, producing noticeable jolts during upshifts or downshifts.
- Intermittent loss of reverse gear: A worn sensor may cause the transmission to momentarily lose reverse function, especially after prolonged operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.125.012 |
| Type | Inductive Proximity Sensor (2-wire) |
| Operating Voltage | 10–30 VDC |
| Output Signal | Frequency / Pulse (NPN NO) |
| Housing Material | Stainless Steel / Brass |
| Thread Size | M12 x 1.0 |
| Overall Length | 45 mm |
| Weight | 0.04 kg (approx.) |
| OEM Reference | ZF 4616.125.012 |
| Sealing | IP67 Rated |
Compatibility
This inductive sensor is specifically designed for the ZF WG 65 Series transmissions, including models such as WG180, WG200, WG210, and WG250. It is also compatible with certain variants of the Ecomat 4HP and 5HP series that share the same sensor interface. Always verify the mounting thread and electrical connector configuration before installation. The sensor integrates with the HOUSING (part 4616301307) and HOUSING (part 4616301309) to ensure proper alignment and sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Encloses gear sets and valve body |
| 0636011118 | HEXAGON SCREW | Secures sensor to housing |
| 4616301307 | HOUSING | Mounting bracket for sensor |
| 4616301309 | HOUSING | Alternate sensor housing variant |
| 0636011038 | HEXAGON SCREW | Fastener for housing assembly |
| 0636016015 | HEXAGON SCREW | Mounting bolt for valve body |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for sensor bracket |
| 0634313118 | O-RING | Seals sensor-to-housing interface |
| 0636304019 | SCREW PLUG | Closes unused sensor ports |
| 0634801152 | SEALING RING | Prevents oil leakage at sensor base |
