Description
Description
This Bosch ABS/ESP control module (also referred to as ABS pump or ABS block) is designed for PSA vehicles Citroen C8 and Peugeot 807. The unit combines hydraulic pump assembly and electronic control to manage Anti-Lock Braking System (ABS) and Electronic Stability Program (ESP) functions. The item is supplied with a short section of wiring harness to assist fitment.
Key Features
- Complete ABS/ESP control unit with hydraulic pump and electronic controller.
- Designed for Citroen C8 and Peugeot 807 PSA models.
- Main Part Number: 0265950075. Additional Reference: 4541C5.
- Includes small wiring harness for connector continuity during installation.
- Direct replacement for units managing wheel speed sensors, pump motor and hydraulic valves.
When And Why Units Fail
ABS/ESP modules tend to fail due to electrical faults (corroded connectors, short circuits), internal pump motor wear, clogged hydraulic valves, or moisture ingress. High mileage, harsh road conditions and exposure to salt or water increase the likelihood of failure. Symptoms include ABS or ESP warning lights on the dash, abnormal braking feel, or loss of ABS/traction control functionality.
Installation Guidance
Replacement should be performed by a trained mechanic or an experienced DIYer comfortable with brake hydraulics and vehicle electronics. Typical steps:
- Disconnect the vehicle battery and wait several minutes to ensure the system is powered down.
- Raise and securely support the vehicle if needed to access the unit.
- Carefully disconnect electrical connectors and detach any retained wiring harness pieces.
- Loosen and remove hydraulic lines from the ABS block; be prepared to capture brake fluid and avoid introducing air into the system.
- Remove mounting bolts and extract the ABS/ESP unit from the vehicle, then fit the replacement in reverse order.
- Refill and bleed the brake system thoroughly to remove air; verify correct brake fluid level and tightness of all fittings.
- Use a compatible diagnostic tool to clear fault codes, perform any necessary system initialisation or calibration, and confirm correct ABS/ESP operation. Some vehicles may require coding or adaptation of the new unit with PSA diagnostic software.
Note: Always follow manufacturer service procedures and safety precautions when working on braking systems.
Technical Information
- Manufacturer: Bosch
- Model: Citroen C8; Peugeot 807 (PSA)
- Product Codes: 0265950075
- Other Numbers: 4541C5; Tags: 265950075 | 4541C5
Compatibility And Fitment
This unit is intended for PSA MPV models Citroen C8 and Peugeot 807 (common production years 2002–2014). Buyers frequently locate this item by searching the Bosch part number 0265950075 or reference 4541C5 — using these codes ensures quick identification and compatibility checks.
Advice For Buyers
If you are replacing an ABS/ESP module, inspect connectors and brake lines for corrosion or damage and ensure all hydraulic connections are leak-free after installation. Because ABS units interface with multiple vehicle systems, plan to perform a diagnostic check and brake bleeding after fitment. If unsure about coding requirements, consult a dealer or a workshop with PSA diagnostic capability.
