Bosch 0265007779 Wheel-Speed Sensor

Bosch 0265007779 Wheel‑Speed Sensor

The Bosch 0265007779 is a high‑performance wheel‑speed sensor designed for rear wheels in a wide range of European passenger cars. It plays a critical role in the vehicle’s Anti‑Lock Braking System (ABS), Electronic Stability Program (ESP) and traction control by providing accurate rotational speed data to the car’s electronic control unit.

Key Functionalities

• Hall Effect Technology: Utilises a magnetic field sensor that generates a voltage proportional to wheel rotation, ensuring reliable operation even under harsh conditions.
• High Accuracy: Delivers precise speed measurements with minimal drift, essential for optimal ABS and ESP performance.
• Low Power Consumption: Designed to operate efficiently within the vehicle’s electrical system, reducing overall energy usage.
• Durable Construction: Encased in a robust housing that protects against vibration, temperature extremes, and moisture.

Technical Specifications

Installation Guide

1. Safety First: Disconnect the vehicle’s battery to prevent accidental electrical contact.
2. Remove Old Sensor: Unscrew the existing wheel‑speed sensor from the rear wheel hub. Carefully detach the cable, noting its orientation and connector type.
3. Prepare New Sensor: Align the Bosch 0265007779 with the mounting holes on the hub. Ensure the magnetic field aligns correctly with the wheel’s toothed rim or gear.
4. Secure Mounting: Tighten the sensor bolts to the manufacturer’s torque specification (typically 10–12 Nm).
5. Reconnect Cable: Plug the sensor cable into the vehicle’s harness, matching polarity and connector type. Verify that the cable is free of kinks.
6. Re‑connect Battery: Restore power to the system.
7. Diagnostic Check: Use an OBD‑II scanner or ABS diagnostic tool to confirm sensor operation and clear any fault codes.

Performance Benefits

• Improved Braking Safety: Accurate wheel speed data allows the ABS module to modulate brake pressure precisely, preventing wheel lock‑up during emergency stops.
• Enhanced Vehicle Stability: ESP relies on real‑time wheel speed inputs; a reliable sensor ensures timely corrective actions for skidding or oversteer conditions.
• Long‑Term Reliability: Bosch’s proven engineering reduces the likelihood of sensor failure, minimizing maintenance costs and downtime.

Common Applications

The Bosch 0265007779 is widely used in European automotive fleets, particularly for models such as:

• Citroën C4 (various engine sizes and trim levels)
• Peugeot 307 (including estate, coupe, and SW variants)
• Related OEMs that share the same rear wheel hub geometry

Quality Assurance & Compliance

This sensor meets stringent automotive standards:

• ISO 26262 functional safety compliance for critical vehicle systems.
• CE marking indicating conformity with European health, safety, and environmental protection legislation.
• Robust testing against vibration, temperature cycling, and electromagnetic interference (EMI).

Maintenance Tips

• Inspect the sensor cable periodically for wear or damage; replace if frayed.
• Keep the sensor housing clean from oil, brake dust, and debris to maintain signal integrity.
• Verify that the mounting bolts remain tight after driving on rough terrain.

Conclusion

The Bosch 0265007779 Wheel‑Speed Sensor delivers dependable, high‑precision wheel speed data essential for modern vehicle safety systems. Its robust design, ease of installation, and proven performance make it a trusted component in the rear wheel assemblies of Citroën C4, Peugeot 307, and related models.