Description
Overview
This Bosch ABS pump and control module (part number 0265800738) is a direct-fit hydraulic and electronic unit commonly used on PSA vehicles. It controls brake pressure during anti-lock braking events and provides the hydraulic boost and modulation required by the ABS system. Customers and workshops often search by the Bosch number or PSA references 4541FF and 4541FG when looking for a compatible unit.
Compatible Vehicles
- Citroën Berlingo II
- Peugeot Partner II
- Citroën Xsara Picasso
Function And Benefits
The unit integrates a high-pressure pump, hydraulic valves and an electronic control module to monitor wheel speed sensors and modulate brake pressure instantaneously. Correct operation restores ABS function, improves vehicle stability under hard braking and helps prevent wheel lock-up on low-grip surfaces. Fitting an appropriate Bosch unit ensures reliable hydraulic performance and OEM-level compatibility.
Replacement And Installation Notes
Replacement should be performed by a qualified mechanic or an experienced DIYer with the right tools. Typical steps include disconnecting the vehicle battery, removing any protective covers or airbox components to access the ABS unit, disconnecting electrical connectors and brake lines, unbolting the module, fitting the replacement and reconnecting lines. After installation, the brake system must be fully bled to remove air. In many cases the ABS module will need to be read and cleared with a diagnostic tool and may require coding or pairing to the vehicle ECU to clear fault codes and enable correct operation.
Common Faults And Service Life
Failure modes include internal hydraulic valve wear, pump motor failure, contaminated brake fluid causing valve sticking, electrical connector corrosion and sensor wiring faults. Symptoms of a failing unit are an illuminated ABS warning light, unusual pump noise during ABS activation, reduced ABS response or longer braking distances. Service life varies with vehicle use, environment and maintenance—regular brake fluid changes and corrosion protection of connections can extend longevity.
Technical Information
- Manufacturer: Bosch
- Model: ABS Pump And Control Module – Fits Citroën / Peugeot Applications
- Product Codes: 0265800738
- Additional Numbers: 4541FF, 4541FG
Note for buyers: This part is frequently searched by the Bosch number 0265800738 and by PSA references 4541FF / 4541FG. Ensure compatibility with your vehicle by matching the part numbers or consulting a workshop manual; diagnostic equipment may be required after replacement to clear fault codes and confirm system operation.
