Description
Product Overview
High-quality ABS pump and control module supplied by Bosch, supplied for Citroën and Peugeot PSA platforms. This ABS unit with OEM references 0265800738, 4541FF (also referenced as 4541FG in some applications) manages hydraulic pressure modulation during anti-lock braking events and integrates the pump, valves and electronic control required for ABS operation.
Key Features
- Direct OEM reference match: 0265800738, 4541FF (cross-reference 4541FG)
- Integrates hydraulic pump, valve block and electronic control for reliable ABS function
- Designed for Citroën and Peugeot models from the PSA platform used on Berlingo, Partner and Xsara Picasso
- Suitable for professional workshops and experienced DIY mechanics who follow correct brake system procedures
What The Unit Does
The ABS pump and control module detects wheel speed variations and modulates brake hydraulic pressure to prevent wheel lock-up during hard braking. The pump restores system pressure when valves reduce pressure at a wheel and ensures continuous modulation until normal braking resumes. Proper function is essential for vehicle stability and controlled stopping distances in emergency conditions.
Common Failure Modes And Causes
- Electrical faults: corroded connectors or internal electronic failure can interrupt communication with the ABS ECU
- Hydraulic wear or contamination: degraded seals, debris or contaminated brake fluid can clog valves or damage the pump
- Moisture and corrosion: exposure over time can cause hydroscopic brake fluid to corrode internal components
- Intermittent failures often start as warning lights or fault codes; full loss of ABS function is less common but possible if left unaddressed
Replacement And Installation Guide
Replacement of an ABS pump should be carried out by a qualified technician or a competent DIY mechanic with the correct tools and knowledge. Key steps include:
- Read and record ABS fault codes with a diagnostic tool before removal to confirm the pump or block is the fault source
- Disconnect the vehicle battery to prevent electrical damage during work
- Protect the work area and prepare to capture brake fluid when disconnecting hydraulic lines
- Remove any covers or brackets to access the ABS unit, unplug electrical connectors and carefully disconnect brake lines
- Unbolt the unit from its mounting bracket and replace with the new Bosch unit, ensuring correct orientation and secure fastenings
- Reconnect hydraulic lines and electrical connectors, then bleed the brake system thoroughly. Modern ABS units commonly require an electronic bleed or diagnostic-assisted bleeding sequence to remove air from the modulator and pump circuits
- Clear ABS fault codes and confirm correct operation with a road test and diagnostic scan
Do not reuse contaminated brake fluid and always follow manufacturer safety procedures when working on the brake system.
Compatibility & Notes
This unit is commonly fitted to PSA models such as Citroën Berlingo, Peugeot Partner and Xsara Picasso when equipped with the matching ABS system. Always verify compatibility by checking the OEM product codes (0265800738, 4541FF, 4541FG) against the vehicle VIN or existing unit stamping before ordering.
Technical Information
- Manufacturer: Bosch (supplied for Citroën and Peugeot PSA applications)
- Model: Citroën Berlingo, Peugeot Partner, Xsara Picasso (select models on PSA platform)
- Product Codes: 0265800738, 4541FF
- Other Numbers: 4541FG (cross-reference)
If you are unsure about fitment, provide the vehicle VIN or the existing ABS unit part number to your supplier to ensure correct selection. Proper bleeding and diagnostic reset are essential after replacement to restore full ABS functionality.
