High-quality Bosch ABS/ESP control module and pump assembly designed for Peugeot 307 vehicles within the PSA group. This integrated unit combines the ABS hydraulic block, pump and electronic control unit (ECU) to manage anti-lock braking and electronic stability control, restoring proper braking performance and vehicle stability.

Key Features

• Complete ABS/ESP assembly including hydraulic block and electronic control for direct replacement.
• Manufactured by Bosch for OE-level fit and function.
• Compatible with original PSA part numbers for straightforward cross-referencing.
• Suitable for professional workshops and experienced DIY mechanics.

Function And Common Failure Modes

The ABS/ESP module monitors wheel speed sensors and modulates hydraulic pressure during braking to prevent wheel lock-up and support vehicle stability. Common causes of failure include electrical faults (damaged connectors, wiring), internal pump or valve wear, hydraulic contamination, and corrosion. Symptoms may include ABS warning light, loss of ABS or ESP function, unusual brake pedal feel, or noise from the pump.

Replacement And Installation Notes

Installation should be carried out by a qualified technician or an experienced DIY mechanic. Typical replacement steps:

• Disconnect the vehicle battery before starting to avoid electrical damage.
• Locate the ABS/ESP unit near the brake master cylinder and carefully disconnect electrical connectors.
• Support and cap brake lines to minimise fluid loss, then unbolt and remove the hydraulic unit.
• Install the new unit, reconnect brake lines and electrical connectors, then bleed the brake system thoroughly to remove air.
• Perform a diagnostic reset and run a system scan to initialise the new ABS/ESP module and confirm there are no fault codes.

After replacement, a proper brake bleed and ECU programming or adaptation may be required to restore full functionality.

When To Replace

Replace the unit if the ABS or ESP warning light remains on and diagnostic checks indicate a pump or module fault, if the pump runs continuously, or if hydraulic leaks or severe corrosion are present. Lifespan depends on driving conditions and maintenance; exposure to moisture and road salt accelerates electrical and hydraulic degradation.

Technical Information

Manufacturer: Bosch / PSA

Model: Peugeot 307 / PSA Group

Product Codes: 9660535780, 0265950374, 0265234152, 9649988180

Additional Numbers: 4541J3, 265234152, 265950374

Please verify part numbers and vehicle compatibility before ordering. If in doubt, provide your VIN to confirm exact fitment.

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