ZF 4651.125.402 INDUCTIVE SENSOR for WG100 | OEM Genuine Part

Overview

The ZF 4651.125.402 INDUCTIVE SENSOR is a critical electronic component engineered for the WG100 transmission series. This OEM genuine part monitors rotational speed and position of internal shafts by generating a magnetic field, sending precise signals to the transmission control unit (TCU). Located within the valve body or housing assembly, it ensures accurate gear engagement and shift timing. The SKU 4651.125.402 is factory-calibrated for direct replacement, restoring factory performance without reprogramming. When installed alongside the 4651101007 TRANSMISSION HOUSING, it forms a sealed, vibration-resistant unit that withstands harsh operating conditions.

Symptoms of Failure

• Erratic shifting or gear hunting – A failing sensor sends intermittent or false speed signals, causing the TCU to shift unpredictably, especially under load.
• Transmission stuck in limp mode – The system defaults to a single gear (often 2nd or 3rd) when the sensor fails, preventing damage but limiting drivability.
• No reverse engagement – Loss of signal from the inductive sensor can prevent the TCU from engaging reverse gear, a common long-tail search query for WG100 operators.
• Intermittent loss of power – The sensor may cause sudden torque converter lockup or unlock, leading to hesitation or surging during acceleration.

Technical Specifications

Compatibility

This inductive sensor is primarily designed for the ZF WG100 series transmissions, including models WG100, WG120, and WG150. It also fits select WG180 and WG200 variants that share the same sensor mounting boss and signal requirements. Always verify the housing interface; the 4651301029 HOUSING and 4651301024 HOUSING are common mounting points for this sensor. For sealing, use the 0634303928 O-RING to prevent fluid ingress.

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