Description
Product Overview
This Bosch ABS & ESP control module with integrated pump and a short wiring harness is intended for PSA vehicles, specifically Citroën C4 and Peugeot 307 models that use the listed part numbers. The unit combines the hydraulic pump and electronic control to manage ABS, traction control and ESP functions. Commonly searched by OEM numbers, it is suitable for professional workshops and experienced DIYers.
Compatibility
Fits Citroën C4 and Peugeot 307 models that use the following reference numbers. Always verify the OEM number on your original part before ordering to ensure correct fitment.
Function And Symptoms
Function: The ABS/ESP control module monitors wheel speed sensors and modulates hydraulic brake pressure via the pump and valves to prevent wheel lock-up, support traction control and maintain vehicle stability.
Common Symptoms Of A Faulty Unit:
- ABS and/or ESP warning lights illuminated on the dashboard
- Loss of ABS/ESC functionality or degraded braking assistance
- Unusual noise from the hydraulic pump when ABS activates
- Intermittent fault codes related to pump motor, valve block, or communication errors
Replacement And Installation Notes
General replacement steps (for qualified personnel):
- Disconnect the negative battery terminal before any work to avoid electrical damage and airbag warnings.
- Locate and remove the ABS/ESP unit (usually mounted in the engine bay) and disconnect all electrical connectors and hydraulic brake lines. Be prepared for brake fluid loss.
- Install the replacement module with its wiring harness, reconnect hydraulic lines and electrical connectors exactly as removed.
- Bleed the brake system according to manufacturer procedures to remove air from the circuit.
- Clear fault codes with an appropriate diagnostic tool and confirm that ABS/ESP systems initialize correctly. Calibrate if required by vehicle manufacturer procedures.
Note: Follow vehicle manufacturer torque specs for brake line fittings and ensure system is free of leaks. If you are not experienced with brake system work, have installation performed by a professional.
Causes Of Failure And Service Life
Typical causes of ABS/ESP unit failure include electrical faults (corrosion in connectors, damaged wiring), internal pump motor wear, hydraulic valve sticking, and contamination or moisture ingress. Service life varies with usage and environment; wet or salt-exposed vehicles are more prone to connector corrosion and early failure.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C4; Peugeot 307
- Product Codes: 9663617980, 0265234396
- Additional Numbers: 9649988180, 0265950517, 4541R3, 4541R4, 1682608180
If you regularly search by part number, the OEM references above will help you confirm compatibility. This unit is supplied with a short wiring harness to facilitate replacement; please match connectors and codes before installation.
