Overview
The ZF 4657.125.002 INDUCTIVE SENSOR is a precision electronic component engineered for the WG190 and related heavy-duty transmission series. This OEM genuine part monitors rotational speed and position within the gearbox, transmitting critical data to the transmission control unit. Mounted directly into the transmission housing, the sensor ensures accurate shift timing and clutch engagement. The SKU 4657.125.002 is the direct factory replacement for maintaining OEM-level performance in ZF drivelines.
Symptoms of Failure
- Erratic gear shifting or delayed engagement: A failing inductive sensor sends inconsistent signals, causing the transmission to hunt for gears or hesitate during acceleration.
- Transmission warning light on dashboard: The ECU detects missing or implausible speed signals, triggering a fault code and warning indicator.
- Loss of cruise control functionality: Without accurate speed data from the 4657.125.002, the system cannot maintain set vehicle speed.
- Intermittent limp mode activation: The transmission may default to a single gear to protect internal components when sensor output drops below threshold.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.125.002 |
| Type | Inductive Proximity Sensor |
| Housing Material | Stainless Steel / Thermoplastic |
| Overall Length | 62 mm (approx.) |
| Thread Size | M12 x 1.5 |
| Operating Voltage | 10–30 V DC |
| Output Signal | Digital (PNP / NPN) |
| Weight | 0.035 kg |
| OEM Reference | ZF 4657.125.002 |
Compatibility
This inductive sensor is a direct fit for the ZF WG190 series and is also compatible with the BP 210, WG 191, WG 210, WG 211, and WG 230 transmission families. It replaces the original sensor in the 4657101039: TRANSMISSION HOUSING assembly. The sensor interfaces with the 4657201028: HOUS.FRONT SECT and the 4657201013: HOUSING REAR PART. It is secured using a 0631306792: CYLINDRICAL PIN for precise alignment. Always verify your transmission model before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657201013 | HOUSING REAR PART | Rear section of transmission housing |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for sensor mounting |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Retains sensor in position |
| 4657301034 | SCREEN SHEET | Debris filter for oil circuit |
| 4657301035 | SCREEN SHEET | Secondary debris filter |
| 0636100803 | CAP SCREW | Fastener for sensor bracket |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply channel |
Frequently Asked Questions
Q: Can the 4657.125.002 sensor be tested before installation?
A: Yes. Using a multimeter set to DC voltage, connect power and ground to the sensor. Rotate the target wheel manually; the output should toggle between 0V and supply voltage. If no signal change occurs, the sensor is defective.
Q: Is this sensor interchangeable between WG190 and WG210 transmissions?
A: The 4657.125.002 fits both WG190 and WG210 series physically, but always confirm the connector type and thread pitch match your specific housing. The sensor mounts into the 4657201028: HOUS.FRONT SECT on both models.
Q: What torque should be used when installing this sensor?
A: Tighten the sensor to 15 Nm (11 ft-lb). Over-torquing can crack the thermoplastic housing. Use a new 0631306792: CYLINDRICAL PIN to ensure proper alignment during installation.
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Phone: +86 158 2286 3467 |
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