Description
Product Overview
High-quality Bosch ABS/ESP control module with integrated hydraulic pump designed for Citroën C4 and Peugeot 307 vehicles. This electro-hydraulic unit combines the electronic control unit (ECU) and the ABS pump/valve block to manage anti-lock braking (ABS) and electronic stability program (ESP) functions, restoring safe braking performance and vehicle stability.
Key Features & Benefits
- Direct-fit replacement for PSA vehicles using specified part numbers; designed for straightforward installation into the original mounting points.
- Combines the electronic control unit and hydraulic pump for compact, factory-style operation.
- Restores ABS and ESP functionality, eliminating warning lights and intermittent braking faults when the module is the confirmed cause.
- Compatible with Bosch OEM standards for durability and electrical reliability.
Suitable For
This unit is intended for use on Citroën C4 and Peugeot 307 models that use the listed part numbers. Always verify compatibility by matching the part number stamped on the original unit or by consulting a vehicle parts database.
Common Symptoms And Failure Modes
- ABS and/or ESP warning lights illuminated on the dashboard.
- Pulsating or soft brake pedal under braking, reduced ABS intervention, or inconsistent traction control behavior.
- Audible noise from the pump motor during operation, or pump cycling continuously.
- Electrical faults due to corroded connectors, water ingress, or internal ECU failure; intermittent faults may indicate connector or sensor issues rather than the module itself.
Installation & Replacement Notes
Replacement should be performed by a trained technician or an experienced DIY mechanic familiar with brake systems. Typical steps include safely supporting the vehicle, disconnecting the battery, removing the faulty unit, and transferring any brackets or connectors. After mechanical installation the brake system must be properly bled to remove air from the hydraulic circuit. In many cases the replacement module will require coding or pairing with the vehicle’s central electronics using a diagnostic tool (for PSA vehicles tools such as DiagBox or a compatible scan tool are commonly used). Always follow safety precautions when working on brake lines and the vehicle electrical system.
Maintenance And Service Life
The service life of an ABS/ESP unit depends on vehicle use and environmental exposure. Electrical failures often stem from moisture, corrosion at connectors, or voltage spikes. Hydraulic components can wear or be contaminated by degraded brake fluid; regular brake fluid changes and corrosion prevention at connectors help extend module life.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C4; Peugeot 307
- Product Codes: 9663617980; 0265234396
- Additional Numbers: 0265950517; 9649988180; 4541R3; 4541R4; 1682608180
- Function: ABS/ESP control unit with integrated hydraulic pump and valve block (electro-hydraulic unit)
If you are unsure about fitment or installation steps, contact a professional workshop or provide your vehicle VIN to confirm compatibility before purchase. Correct diagnosis of the ABS/ESP system is recommended to avoid replacing components that are not at fault.
