Description
Product Overview
This ABS/ESP control unit (ECU) with integrated pump and hydraulic module is designed for Citroën Xsara vehicles. The Bosch unit is commonly referenced by part numbers 0265950057, 9641975380 and 4541C7, so many customers search by these codes. The module manages anti-lock braking and electronic stability functions to maintain vehicle safety under hard braking and slippery conditions.
Features
- Electronic control of hydraulic brake pressure during ABS and ESP interventions.
- Integrated electric motor-driven hydraulic pump to restore pressure when valves modulate braking force.
- Communication with wheel speed sensors and vehicle network to detect and correct wheel slip.
- Commonly identified by Bosch part code and PSA reference numbers for easy lookup.
Compatibility And Fitment
Intended for Citroën Xsara vehicles. This unit is used on PSA group platforms; however, fitment can vary by production date and submodel. Always confirm compatibility by checking the product codes, connector type and mounting arrangement before purchasing or installing.
Installation & Replacement Guidance
- Disconnect the vehicle battery and secure the car on stands. Safety first—work on a cool, stable vehicle.
- Use a diagnostic scanner to read and record ABS/ESP fault codes before removal.
- Relieve brake system pressure, then disconnect electrical connectors and hydraulic brake lines from the ABS unit. Prepare to capture brake fluid and avoid contamination.
- Remove mounting bolts and extract the module. Transfer any brackets or sensors if required by the replacement unit.
- Install the new unit, torque fasteners to manufacturer specification, reconnect lines and electrical plugs, then bleed the brake system thoroughly (pressure bleeding or scanner-assisted procedure recommended).
- Clear fault codes with a diagnostic tool and perform a controlled road test to verify ABS/ESP operation.
Common Failure Causes & Symptoms
Common causes of ABS/ESP unit failure include moisture ingress and corrosion, electrical connector faults, internal valve or pump motor wear, and contaminated hydraulic fluid. Typical symptoms to watch for: ABS or ESP warning lights on the dashboard, pulsating or unusually soft brake pedal, increased braking distance, continuous pump operation or audible noises from the pump.
Technical Information
- Manufacturer: Bosch (for PSA applications)
- Model: Citroën Xsara / PSA group fitment
- Product Codes: 0265950057
- Other Numbers: 9641975380, 4541C7
Note: Always verify the part numbers and connector layout against the vehicle you are repairing. If in doubt, consult workshop documentation or a diagnostic tool to confirm the correct ECU/pump combination for your Citroën Xsara model.
