Metzger 0900671 Sensor, wheel speed

Metzger 0900671 Sensor – Wheel Speed

The Metzger 0900671 is a high‑performance wheel speed sensor designed for rear axle applications in a wide range of vehicles, including Citroën C2, C3, Peugeot 1007 and other models that require precise wheel rotation data. This sensor plays a critical role in the vehicle’s anti‑lock braking system (ABS), electronic stability program (ESP) and traction control systems by delivering accurate rotational speed information to the vehicle’s control unit.

Key Features

• Hall Effect Technology: Utilizes a Hall effect transducer that generates a voltage signal proportional to wheel rotation, ensuring reliable performance even under harsh automotive conditions.
• Compact and Robust Design: The sensor’s sealed housing protects against dust, water, and vibration, making it suitable for the demanding environment of the rear axle.
• High Accuracy: Provides precise wheel speed data with minimal error, essential for effective ABS and ESP operation.
• Wide Operating Temperature Range: Functions reliably from -40 °C to +120 °C, accommodating extreme climates.
• Low Power Consumption: Optimized electrical characteristics reduce load on the vehicle’s power supply.

Technical Specifications

Installation and Compatibility

The Metzger 0900671 is engineered to fit seamlessly into the rear axle assemblies of several popular models. Its standardized mounting flange and connector layout allow for straightforward replacement of OEM sensors without requiring additional adapters or modifications.

• Citroën C2 (3‑/5‑door): Compatible with both petrol and diesel variants, ensuring reliable ABS performance across the range.
• Citroën C3 (3‑/5‑door): Designed to meet the sensor requirements for the rear wheel of this compact hatchback.
• Peugeot 1007: Fits the rear axle sensor housing, providing accurate wheel speed data for the vehicle’s safety systems.
• Other Citroën and Peugeot models with similar rear axle configurations also support this sensor.

Operational Principles

The sensor operates on the Hall effect principle: a magnetic field is generated by a rotating toothed wheel or gear. As each tooth passes the Hall element, it induces a voltage pulse. The frequency of these pulses directly correlates with the wheel’s rotational speed. This signal is then transmitted to the vehicle’s electronic control unit (ECU), which uses it to calculate braking force distribution and maintain stability.

Benefits for Vehicle Safety

• Enhanced Braking Efficiency: Accurate wheel speed data allows ABS to modulate brake pressure precisely, preventing wheel lock‑up during emergency stops.
• Improved Stability Control: ESP relies on real‑time wheel speed inputs to detect and correct oversteer or understeer conditions.
• Traction Management: Traction control systems use the sensor data to reduce wheel slip, especially in low‑traction scenarios.
• Reliability Under Stress: The robust construction ensures consistent performance even when exposed to high temperatures, vibration, and moisture.

Maintenance Tips

While the sensor is designed for long life, regular checks can help maintain optimal performance:

1. Visual Inspection: Look for signs of corrosion or physical damage on the housing and connector pins.
2. Connector Cleanliness: Ensure that the three‑wire connector remains free from dirt, oil, or rust to guarantee a solid electrical connection.
3. Signal Verification: Use an oscilloscope or diagnostic scan tool to confirm pulse frequency matches expected wheel speed during test drives.

Conclusion

The Metzger 0900671 wheel speed sensor is a critical component for maintaining vehicle safety and performance. Its Hall effect design, robust construction, and precise signal output make it an ideal choice for rear axle applications in Citroën, Peugeot, and other compatible models. By delivering reliable wheel rotation data to ABS, ESP, and traction control systems, this sensor helps ensure that drivers experience smooth braking, stable handling, and overall confidence on the road.