Description
Overview
High-quality Bosch ABS/ESP control unit supplied for PSA (Peugeot/Citroën) vehicles. This complete unit integrates the ABS pump, hydraulic modulator and electronic control to manage anti-lock braking and electronic stability control functions on Peugeot 307 models. Buyers often search by the part numbers listed below, so always verify compatibility with your VIN.
Key Features And Function
- Integrated ABS pump and hydraulic block with electronic control for ABS and ESP/ESC functions.
- Monitors wheel speed sensors and modulates brake pressure to prevent wheel lockup and improve vehicle stability under braking.
- Designed for use on PSA platforms; commonly fitted to Peugeot 307 variants. Part numbers are frequently used to locate the correct unit.
- Includes a piece of wiring harness to simplify connection during replacement.
Fitment And Part Numbers
This unit is identified by the product numbers shown below. Always cross-check these numbers with the vehicle’s VIN and existing module label before purchase. If in doubt, consult a parts database or dealer for confirmation.
Replacement And Installation
- Ensure you have the correct replacement part by checking the part numbers on the unit and the vehicle VIN.
- Disconnect the negative battery terminal and follow safety procedures to avoid airbag/ECU issues.
- Read and clear ABS/ESP fault codes with a diagnostic scanner before removal to record the current faults.
- Carefully disconnect electrical connectors and any supplied wiring harness piece; unfasten the unit from the vehicle.
- Install the replacement unit, reconnect connectors and wiring, then bleed the brake system to remove air from the circuit.
- A dealer-level or compatible diagnostic tool is usually required to initialise or program the new module, perform ABS pump priming and synchronise with vehicle immobiliser/ECU where applicable.
Common Faults And Causes
Failures on ABS/ESP units typically result from water ingress, corrosion, damaged wiring or connector faults, failed pump motor or internal valve block issues. Electrical anomalies and sensor faults can also trigger ABS/ESP warning lights. Symptoms include illuminated ABS/ESP warning lights, loss of ABS functionality, unusual pump noise or persistent error codes on a diagnostic scanner.
Notes For Mechanics And DIY
This unit is aimed at professional technicians and experienced DIYers. Successful replacement often requires a proper scan tool to read/clear fault codes, perform module initialisation and ensure system safety. Always follow manufacturer safety instructions when working on brake systems and ensure a full brake bleed after installation.
Technical Information
Manufacturer: Bosch / PSA (Citroën/Peugeot)
Model: Peugeot 307
Product Codes: 9648435380, 0265950084, 4541T1
Additional Numbers: 4541T2
