Metzger 0900004 Sensor, wheel speed

Metzger 0900004 Wheel Speed Sensor – Precision & Reliability

The Metzger 0900004 is a high‑performance wheel speed sensor designed specifically for the rear axle of BMW models such as the E39 series (520, 523, 525, 530, 540, M5). It plays a critical role in the vehicle’s ABS (Anti‑Lock Braking System), ensuring safe and controlled braking under all driving conditions.

Key Functionalities

• Accurate Wheel Speed Measurement: Utilizes a Hall effect principle to detect wheel rotation with high precision, providing real‑time data to the ABS control unit.
• Dual‑Side Compatibility: Available in left and right versions (Hinten Links/Hinten Rechts) for seamless installation on either side of the rear axle.
• Robust Construction: Engineered with durable materials that withstand extreme temperatures, vibration, and exposure to road salts and debris.
• Seamless Integration: Designed to fit OEM specifications, ensuring a perfect match with BMW’s electronic architecture without the need for additional adapters or modifications.

Technical Specifications

Installation Overview

The Metzger 0900004 is engineered for straightforward installation. Technicians typically follow these steps:

1. Remove the existing wheel speed sensor or ABS module from the rear axle.
2. Align the new sensor’s mounting flange with the axle housing and secure it using the supplied bolts.
3. Connect the electrical harness, ensuring proper polarity and a snug fit to prevent vibration damage.
4. Verify signal integrity by checking the sensor output with an oscilloscope or diagnostic scan tool.

Because the sensor adheres strictly to OEM specifications, it eliminates compatibility issues that often arise with aftermarket replacements.

Why Choose Metzger?

• Proven Reliability: Metzger has a long-standing reputation for producing high‑quality automotive sensors used worldwide in both original equipment and after‑market applications.
• Consistent Quality Control: Each sensor undergoes rigorous testing to meet or exceed BMW’s stringent performance criteria.
• Global Support Network: While the product itself is purely technical, Metzger’s extensive service network ensures that parts are readily available for maintenance and repair.

Applications Beyond BMW E39

The 0900004 sensor’s design makes it suitable for other rear‑axle applications where precise wheel speed detection is required. Its Hall effect technology is universally compatible with modern ABS, ESP (Electronic Stability Program), and traction control systems.

Maintenance Tips

• Regular Inspection: Check the sensor’s wiring harness for signs of wear or corrosion during routine maintenance checks.
• Cleanliness Matters: Keep the sensor housing free from oil, grease, and debris to maintain optimal signal quality.
• Temperature Monitoring: Ensure that operating temperatures remain within specified limits; extreme heat can degrade sensor performance over time.

Conclusion

The Metzger 0900004 Wheel Speed Sensor is a cornerstone component for BMW’s rear‑axle ABS system. Its precise Hall effect measurement, durable construction, and OEM compatibility make it the preferred choice for technicians seeking reliability and performance in critical safety systems.