Metzger 0900041 Sensor, wheel speed

Metzger 0900041 Wheel Speed Sensor

The Metzger 0900041 is a high‑performance wheel speed sensor designed for rear right wheels on Mercedes-Benz models such as the C‑Class, CLK, and CLC. It plays a critical role in vehicle safety systems by providing accurate rotational data to the Anti‑Lock Braking System (ABS) and Electronic Stability Program (ESP).

Key Functionalities

• Hall Effect Technology: Utilizes a magnetic Hall effect principle to detect wheel rotation without physical contact, ensuring durability under harsh operating conditions.
• High Accuracy: Delivers precise speed measurements essential for ABS modulation and traction control algorithms.
• Wide Temperature Range: Operates reliably from -40 °C to +120 °C, accommodating extreme climates and high‑performance driving scenarios.
• Low Power Consumption: Designed to minimize electrical load on the vehicle’s power supply while maintaining signal integrity.

Technical Specifications

Installation Guidelines

1. Remove the Existing Sensor: Disconnect the battery, detach the wheel hub cover, and unscrew the old sensor using a suitable socket set.
2. Prepare the New Sensor: Verify that the mounting flange aligns with the hub. Apply anti‑seize compound to the mounting bolts if recommended by OEM guidelines.
3. Mount the Sensor: Align the sensor’s magnetic pole with the wheel rim’s toothed pattern, secure it with bolts, and tighten to manufacturer torque specifications.
4. Reconnect Electrical Harness: Attach the sensor connector to the vehicle’s wiring harness, ensuring a firm connection without bending pins.
5. Test Functionality: After reassembly, start the engine and observe ABS diagnostic lights. Use an OBD‑II scanner to confirm that wheel speed data is being transmitted correctly.

Compatibility Overview

The Metzger 0900041 is specifically engineered for:

• MERCEDES‑BENZ C‑CLASS (CLC, CLK)
• Rear right wheel assemblies
• Vehicles equipped with standard ABS and ESP modules that accept Hall effect sensor inputs.

It is not intended for front wheels or non‑Mercedes-Benz platforms without OEM confirmation.

Maintenance & Troubleshooting

• Regular Inspection: Check the sensor housing for cracks, corrosion, or debris that could impede magnetic field transmission.
• Signal Verification: Use a multimeter to confirm the correct current loop output. A reading outside the 5–20 mA range indicates a fault.
• Connector Integrity: Inspect pins for oxidation or damage; clean with contact cleaner if necessary.
• Wheel Rim Condition: Ensure that the rim’s toothed pattern remains intact, as wear can reduce sensor accuracy.

Benefits to Vehicle Performance

• Enhanced Safety: Accurate wheel speed data allows ABS to modulate brake pressure precisely, preventing wheel lock‑up during emergency stops.
• Improved Traction Control: ESP uses sensor input to detect loss of traction and applies corrective braking forces.
• Longevity: Non‑contact Hall effect design reduces wear compared to mechanical sensors, extending service life.
• Reliability Under Stress: Wide temperature tolerance ensures consistent performance in both hot summer drives and cold winter conditions.

Conclusion

The Metzger 0900041 Wheel Speed Sensor is a meticulously engineered component that delivers reliable, high‑precision data essential for modern vehicle safety systems. Its robust construction, compatibility with key Mercedes-Benz models, and adherence to stringent automotive standards make it an indispensable part of any rear wheel assembly requiring ABS and ESP functionality.