Description
Control module, ABS pump and Bosch ESP/ABS hydraulic block for Citroën C4 and Peugeot 307. It is from a 2006 Peugeot 307 2.0 16V automatic. Supplied with a section of wiring harness.
Overview
This Bosch ABS/ESP hydraulic unit is a direct replacement part commonly fitted on mid‑2000s Citroën C4 and Peugeot 307 models. The module controls the ABS pump and the hydraulic valves that manage braking pressure during ABS and ESP interventions. Supplied with a piece of the original wiring harness, this unit is suitable for experienced mechanics and skilled DIYers who service braking and stability systems.
Key Features and Function
- Bosch ABS/ESP hydraulic block with integrated electronic control module and pump.
- Manages Anti‑lock Braking (ABS) and Electronic Stability Program (ESP) interventions by modulating brake pressure to individual wheels.
- Includes part of the original wiring harness to facilitate installation and connector alignment.
- Typical OE or OEM reference numbers included for easier identification during ordering or searching.
Compatibility
Primarily intended for Citroën C4 and Peugeot 307 vehicles from the mid‑2000s. The specific donor vehicle for this unit is a 2006 Peugeot 307 2.0 16V automatic. Compatibility should be checked against the vehicle’s existing ABS unit part numbers before installation.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C4; Peugeot 307
- Product Codes: 9663241680; 0265950636
- Additional Numbers: 1682607580; 4541Q4; 4541Q5
Installation Recommendations
Recommended for professional mechanics or experienced DIY technicians. Follow these general steps and safety notes:
- Disconnect the vehicle battery before starting work to prevent electrical damage or fault codes.
- Relieve brake system pressure and drain brake fluid as required by the vehicle manufacturer’s procedure.
- Carefully disconnect electrical connectors and any retained sections of wiring harness. Label connectors if necessary for reassembly.
- Remove hydraulic lines from the unit using appropriate tools; prepare to capture leaking brake fluid and avoid contamination.
- Mount the replacement unit securely, reconnect hydraulic lines and electrical connectors, and torque fittings to manufacturer specifications.
- Refill the brake fluid with the correct specification and perform a complete brake bleed. Use a diagnostic tool to cycle the ABS pump and valves, and to clear any fault codes after installation.
- Inspect for leaks and verify proper ABS/ESP operation with a road test in a safe environment.
Why This Part Fails Most Often
- Corrosion and Water Ingress: Moisture reaching hydraulic ports or electrical connections causes corrosion and intermittent faults.
- Brake Fluid Contamination: Old or contaminated brake fluid accelerates internal valve and pump wear.
- Electrical Faults: Connector corrosion, broken wires in the harness or failed electronic components in the control module.
- Mechanical Wear: Pump motor or internal valve block wear after many years or high mileage.
- Accident Damage: Impact to the front of a vehicle can damage the hydraulic unit or its mounting and lines.
Service Life and Maintenance Tips
Failures become more likely on high‑mileage or older vehicles—commonly after 10+ years depending on use and environment. Regular brake fluid changes to the manufacturer’s schedule and corrosion protection of connectors and chassis areas help extend unit life.
Notes For Purchasers
This unit is a used Bosch ABS/ESP hydraulic block removed from a 2006 Peugeot 307 2.0 16V automatic and is supplied with a section of the original wiring harness. Verify part numbers listed above match the unit being replaced to ensure compatibility.
Safety Reminder
Brake and stability system repairs affect vehicle safety. If you are not confident in performing the repair and bleeding/cycling procedures correctly, have the installation carried out by a qualified workshop.
