Description
Overview
Designed for professional mechanics and DIY enthusiasts, this Bosch ABS control module and hydraulic pump for Citroën Xsara Picasso is a direct replacement for PSA vehicles. Supplied under part numbers 0273004353 / 0265216642 / 9633666580 / 454150, this ABS unit integrates the electronic control unit and hydraulic modulator to manage wheel slip and braking stability.
Function And Benefits
The ABS module monitors wheel speed sensors and modulates brake pressure via its hydraulic pump and valves to prevent wheel lock-up during hard braking. Fitting an OEM Bosch unit restores reliable anti-lock braking performance, improves vehicle safety, and ensures compatibility with vehicle stability systems where applicable.
Common Faults And Symptoms
Typical failure modes include electrical faults such as corroded connectors or failed internal relays, hydraulic problems like leaking valves or a worn pump, and sensor-related errors that trigger warning lights. Symptoms include an illuminated ABS or ESP warning light, unusual brake pedal feedback, or diminished ABS responsiveness.
Replacement Notes
Replacement generally involves isolating the battery, accessing the ABS unit (wheel arch liner or engine bay), disconnecting electrical connectors and brake lines, unbolting the module, installing the replacement, and refilling and bleeding the brake system. Some vehicles may require ABS coding, calibration, or a diagnostic scan to clear faults and ensure full integration.
Compatibility
Typically used on Citroën Xsara Picasso models and compatible PSA vehicles that list the above part numbers. Always verify compatibility by matching OEM part numbers or consulting the vehicle’s VIN and an official parts catalog before purchase.
Technical Information
- Manufacturer: Bosch
- Model: Citroën Xsara Picasso
- Product Codes: 0273004353, 0265216642
- Other Numbers: 9633666580, 454150
