Professional Bosch ABS/ESP control module supplied with a section of wiring harness, suitable for PSA models Citroën C4 and Peugeot 307. This unit houses the hydraulic pump and electronic control that manage anti-lock braking and electronic stability functions. Customers frequently search by the original product numbers for fast identification and correct fitment.

Key Features

• Complete Bosch ABS/ESP control module combined with a piece of wiring harness for direct connection.
• Direct fit for specified Citroën and Peugeot models; replacement part for vehicles using the listed part numbers.
• Preserves ABS and ESP functionality including wheel speed sensing, pump activation and modulator control.

Compatibility

Fits: Citroën C4, Peugeot 307. Commonly referenced by product codes and OEM numbers listed below for correct matching.

Function And Common Symptoms

The ABS/ESP control module monitors wheel speed sensors and modulates hydraulic pressure via the integrated pump and valves to prevent wheel lock and to support vehicle stability control. Typical failure symptoms include illuminated ABS/ESP warning lights, audible pump running continuously, reduced braking performance under lock-prone conditions, intermittent loss of traction control or fault codes stored in the vehicle diagnostics.

Replacement And Installation Notes

Installation should be performed by a qualified mechanic or an experienced DIYer comfortable with vehicle safety and brake systems. General steps:

• Disconnect the vehicle battery before starting to avoid electrical damage.
• Access the ABS unit (typically located in the engine bay near the brake master cylinder) and disconnect electrical connectors carefully.
• If hydraulic lines are disconnected during removal, prepare for controlled fluid drainage and ensure correct reconnection to avoid air ingress.
• After fitting, bleed the brake system according to manufacturer procedures and clear stored fault codes with an appropriate diagnostic tool.
• Note: The replacement unit may require diagnostic re-learning or coding to the vehicle's ECU to restore full ABS/ESP functionality. Confirm compatibility and programming requirements before installation.

Failure Causes And Service Life

Failures are commonly caused by corrosion, water ingress, electrical connector faults, or wear of the pump motor and internal valves. Environmental exposure and lack of maintenance accelerate deterioration. Service life varies with vehicle use and conditions; inspect connectors and wiring regularly to reduce premature failures.

Technical Information

Manufacturer: Bosch

Model: Citroën C4; Peugeot 307

Product Codes: 9663617980, 0265234396

Additional Numbers: 9649988180, 0265950517, 4541R3, 4541R4, 1682608180

Included: Section Of Wiring Harness (as pictured/described)

If you are unsure about fitment or programming needs, consult a workshop manual or a professional diagnostic service before purchase. Identification by product number ensures the best match for Citroën and Peugeot PSA vehicles.

The Bosch ABS/ESP control module with integrated pump and hydraulic block is designed for PSA vehicles, primarily Citroën C4 and Peugeot 307. It controls anti-lock braking (ABS) and the electronic stability program (ESP), modulating brake pressure and operating the high-pressure pump to prevent wheel lock and help stabilize the vehicle during emergency maneuvers.

Compatibility

Suitable For Citroën C4 And Peugeot 307 Models. Customers Frequently Search By Part Numbers 9663617980 And 0265234396 To Find The Correct Unit.

Common Failures And Causes

• Electronic Faults: Internal control electronics can fail and trigger ABS/ESP warning lights or error codes.
• Pump Wear: The hydraulic pump can deteriorate over time or after prolonged use, especially with contaminated brake fluid.
• Connector Corrosion: Moisture Infiltration Or Corrosion On Electrical Connectors Causes Intermittent Or Permanent Faults.

Replacement And Service Notes

Typical Replacement Procedure (Summary): Scan For Fault Codes; Disconnect The Battery; Contain Or Drain Brake Fluid; Disconnect The Electrical Connector; Unbolt The ABS/ESP Unit; Remove And Cap Brake Lines To Prevent Contamination; Fit The Replacement Unit; Reconnect Electricals And Hydraulic Lines; Refill And Completely Bleed The Brake System; Clear Fault Codes And Perform A Controlled Road Test. A Diagnostic Tool Is Required For Fault Diagnosis, Code Clearing And Module Initialization/Coding Where Applicable.

Practical Tips For Mechanics And DIYers

Always Verify Exact Part Number Against The Vehicle VIN Before Ordering. Confirm That Wheel Speed Sensors, Wiring And Grounds Are Functional Before Replacing The Module. After Installation, Perform A Full Brake Bleed And Use A Diagnostic Interface To Confirm Proper Pump Operation And ESP Functionality. Driving With An Active ABS/ESP Fault Is Not Recommended.

Technical Information

Manufacturer: Bosch / PSA

Model: Citroën C4; Peugeot 307

Product Codes: 9663617980; 0265234396

Other Numbers: 9649988180; 0265950517; 4541R3; 4541R4; 1682608180