Overview

High-quality Bosch ABS/ESP hydraulic block and control module compatible with Citroën C4 and Peugeot 307 platforms. Ideal for professional workshops and experienced DIY mechanics searching by OE numbers (9663241680, 0265950636) or alternative references. The unit integrates the ABS pump, hydraulic valves and electronic controller to manage anti-lock braking (ABS), electronic stability control (ESP) and traction interventions. Supplied with a short wiring harness section to simplify replacement and connector alignment.

Key Benefits

• Direct fit for many Citroën C4 and Peugeot 307 applications — reduces diagnostic time when replacing a failed ABS/ESP module.
• Bosch engineering ensures precise hydraulic modulation for stable braking performance and improved safety in emergency maneuvers.
• Searchable by multiple product codes and part numbers commonly used in parts catalogs and workshop databases.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4, Peugeot 307
• Product Codes: 9663241680, 0265950636
• Other Numbers: 1682607580, 4541Q4, 4541Q5, 265950636, 9653241680

Installation Recommendations

Follow safe workshop procedures and use appropriate tools. Typical installation steps for a competent mechanic:

• Always disconnect the negative battery terminal before starting work to prevent electrical damage and airbag/ECU faults.
• Raise the vehicle and remove wheel(s) or undertray as needed to access the brake master cylinder area where the ABS/ESP unit is mounted.
• Carefully disconnect electrical connectors and label them if necessary. Disconnect brake lines with appropriate line wrenches; expect brake fluid loss.
• Remove mounting bolts and replace the unit as an assembly. If supplied, use the included wiring section to ensure correct connector positioning.
• After mechanical installation, bleed the brake system thoroughly (recommended: pressure or vacuum bleeding) to remove air from the ABS hydraulic circuit and brake lines.
• Clear fault codes and perform ABS/ESP initialization with a compatible diagnostic tool. Using PSA service tools (DiagBox/Lexia/PP2000) or a professional scanner will ensure proper adaptations and fault code removal.

Why This Part Most Often Fails

Common failure causes include:

• Corrosion and moisture ingress into electrical connectors or the hydraulic block, especially on older vehicles or in regions with road salt.
• Contaminated or degraded brake fluid causing internal valve or pump wear and contamination of manifolds.
• Electrical faults such as short circuits, damaged wiring or connector corrosion leading to intermittent operation or total loss of the controller.
• Mechanical wear of the pump motor or solenoid valves after years of service, often following high mileage or lack of maintenance.

Notes For Workshop Use

This unit is typically located next to the brake master cylinder and must be handled with care to avoid damage to brake lines and electrical connectors. After replacement, perform a full brake-test and road-test to verify ABS and ESP functionality under safe conditions. Keep brake fluid clean and follow manufacturer service intervals to prolong the life of the hydraulic block and pump.

Recommended Tools

• Basic metric hand tools and torque wrench
• Brake line wrenches and fluid catch container
• Brake bleeding kit (pressure or vacuum)
• Diagnostic scanner with ABS/ESP functions (DiagBox/PP2000/Lexia recommended for full adaptation)

The Bosch ABS ESP unit is a key part of the braking system of Citroën and Peugeot cars. It ensures the proper functioning of the anti-lock braking system (ABS) and stabilization system (ESP), which significantly increases driving safety, car stability and shortens the braking distance, especially on slippery or uneven surfaces.

This particular part is particularly suitable for Citroën C4 and Peugeot 307 cars and is often searched for by the product numbers listed below. A piece of wiring is also included, which can facilitate assembly and possible repairs to the original installation.

Technical information:
Manufacturer: Bosch / PSA
Model: ABS/ESP control module and pump (ABS ESP cube) for Citroën C4, Peugeot 307

Product codes (PSA):
9665915780
4541FV
4541FW
9661887180

Other numbers (Bosch / others):
0265950963
0265230291
1682607080

Uses and Functions:
– Ensures brake pressure regulation in the event of wheel lock-up (ABS)
– Participates in stabilizing the car in emergency situations (ESP)
– Contributes to a safer and more secure behavior of the car during braking and evasive maneuvers
– Suitable as a replacement for a faulty unit when ABS/ESP warning lights or error messages on the instrument panel are lit

Installation recommendations:
– Carry out assembly with the battery disconnected to avoid damaging the electronics.
– Before removing the old part, mark and photograph the arrangement of the brake pipes and connectors so that the connection is identical.
– Work in a clean environment, prevent dirt from entering the brake circuits.
– After installation, it is necessary to ventilate the system thoroughly and check the tightness of all connections.
– It is recommended to carry out diagnostics and possible calibration/bleeding of the ABS via a diagnostic tool according to the vehicle manufacturer’s procedure.
– After installation, perform a test drive in safe conditions and verify that the ABS/ESP warning lights are off and the system is working properly.

This part is suitable for auto mechanics and skilled home repairers who are looking for a specific Bosch ABS/ESP unit according to the original codes and want to reliably restore the function of the braking and stabilization system of their car.

This ABS module is specifically engineered for Citroën C4 and Peugeot 307 models, ensuring seamless compatibility and performance. The ABS system plays a crucial role in vehicle safety by preventing wheel lock-up during braking, which enhances driver control and stability on the road. Replacing a faulty or aging ABS control unit with this genuine Bosch part can significantly improve braking efficiency and increase overall driving safety.

Technical Information
Manufacturer: Bosch
Model: Citroën C4, Peugeot 307
Product Codes: 9663345480, 0265800406, 0265231508, 9661886780, 4541Q1, 4541Q2, 1680903280, 1680903380
Additional Numbers: As listed above

The ABS control module and pump are known to wear out over time due to general use and exposure to harsh driving conditions. Common signs of failure include warning lights on the dashboard or reduced braking performance. Timely replacement restores the functionality of the ABS, preventing wheel lock and maintaining safe braking distances under various road conditions.

Designed for professional mechanics and car enthusiasts who perform their own repairs, this Bosch ABS control unit promises durability and precise fit, helping extend the life and safety of your Citroën C4 or Peugeot 307. Invest in quality replacement parts to ensure your braking system operates reliably every time you drive.

Add this indispensable ABS control module and pump to your cart today and secure the safety and longevity of your vehicle with trusted Bosch technology.

Discover a reliable Bosch ABS and ESP module designed specifically for the Citroën C4. This essential unit, identified by product codes 9657352680, 0265950370, and 4541E4, includes an integrated ABS pump and a piece of wiring harness to facilitate straightforward installation. Ideal for automotive professionals and DIY enthusiasts alike, this module plays a crucial role in maintaining your vehicle’s braking efficiency and stability control.

The ABS (Anti-lock Braking System) module prevents wheel lock-up during emergency braking, maintaining traction and steering control. Paired with the ESP (Electronic Stability Program) unit, it helps stabilize the vehicle by correcting oversteer or understeer in critical driving situations. Together, they significantly enhance driving safety by reducing the risk of skidding and improving overall vehicle handling.

This Bosch module is compatible with various model years of the Citroën C4 that support these specifications. Typically, ABS and ESP modules require replacement due to wear over time or damage resulting from normal vehicle operation. Replacing this unit can restore original braking performance and safety features, ensuring your vehicle complies with manufacturer standards.

Installation is straightforward thanks to the included wiring harness section, allowing quicker connection to the existing vehicle systems. Maintain optimal braking safety and vehicle control by fitting this high-quality Bosch ABS and ESP module on your Citroën C4 without delay.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4
• Product Codes: 9657352680, 0265950370, 4541E4
• Additional Numbers: NFP

High-quality Bosch ABS hydraulic block designed for Citroën C4 and Peugeot 307 models. This complete assembly includes the ABS control module, pump and a portion of the wiring harness, making it a practical replacement unit for garages and experienced DIYers. Frequently searched by OEM numbers such as 9659457180, 0265800395, and 0265231486, this unit restores anti-lock braking functionality and fault-free ABS communication when installed and commissioned correctly.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4, Peugeot 307
• Product Codes: 9659457180, 0265800395, 0265231486
• Additional Numbers: 9649988280, 265800395, 4541J1

Function And Benefits

The ABS hydraulic block houses the electronic control unit, pump motor and hydraulic valves that modulate brake pressure during ABS intervention. It prevents wheel lockup under heavy braking, improves vehicle stability and shortens stopping distance in slippery conditions. Replacing a faulty ABS unit restores proper brake pressure modulation, eliminates persistent ABS fault codes and removes warning lamp indications when the system is correctly bled and reset.

How It Is Replaced

• Disconnect Battery Before Work: Always disconnect the negative battery terminal to avoid electrical damage and unintended pump activation.
• Access And Remove: Locate the ABS hydraulic block in the engine bay (usually adjacent to the brake master cylinder), disconnect the electrical connector(s) and the brake lines, and unbolt the unit from its bracket. Retain sealing washers and replace them if damaged.
• Install New Unit: Fit the replacement unit, tighten hydraulic fittings to manufacturer torque values, reconnect the wiring harness and secure all fasteners.
• Bleed Brake System: Perform a complete brake bleeding procedure to remove air from the system. Use a pressure/vacuum bleeder or follow the vehicle manufacturer’s sequential bleeding method.
• Diagnostics And Reset: After bleeding, clear ABS fault codes and run the ABS pump priming/bleeding routine with a compatible diagnostic tool to fully initialize the unit.

Installation Recommendations

• Always Disconnect The Battery Before Removing The Unit To Prevent Damage.
• Use New Sealing Washers On Brake Lines And Replace Any Damaged Hoses.
• Tighten Brake Line Fittings To Manufacturer Torque Values To Prevent Leaks.
• Perform A Thorough Brake Bleed Immediately After Installation To Avoid Air In The System.
• Use A Diagnostic Tool Compatible With PSA Vehicles (e.g., DiagBox) To Clear Codes And Confirm Proper Operation.

Why This Part Most Commonly Fails

• Corrosion And Moisture Ingress: Salt and moisture accelerate corrosion of hydraulic channels and electrical connectors, leading to valve sticking or electrical faults.
• Pump Motor Wear: The electric pump can wear out after extended use, producing noise or failing to build pressure.
• Contamination: Brake fluid contamination or debris can clog valves and damage internal components.
• Electrical Connector Issues: Corroded or loose connectors cause intermittent faults and communication errors with the ABS ECU.
• Impact Damage: Collisions or strong impacts near the master cylinder area can damage the hydraulic block or mounting points.

Notes For Mechanics And DIYers

This unit is commonly identified and ordered by OE numbers (e.g., 9659457180, 0265800395, 0265231486). Suitable for Citroën C4 and Peugeot 307 platforms. After physical replacement, complete bleeding and a diagnostic check are essential to restore full ABS functionality and remove stored fault codes. If unsure about torque settings, bleeding sequences or diagnostic procedures, consult factory repair literature or a qualified technician.

This Bosch ABS/ESP control unit and pump is designed for Peugeot 307 CC models and is supplied with part of the wiring harness to simplify replacement. Frequently searched under product numbers, this unit combines the hydraulic pump, valve block and electronic controller for the Anti-Lock Braking System and Electronic Stability Program, making it a direct-fit solution for workshops and experienced DIYers who service Peugeot braking systems.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 307 CC (Compatibility With Other 307 Variants Possible)
• Product Codes: 0265950093
• Other Numbers: 4541W5, 4541W6, 265950093, NFP

Compatibility And Fitment

Primarily Intended For Peugeot 307 CC. May Fit Other Peugeot 307 Variants Equipped With ESP/ABS When Matching Product Codes. Many Customers Search By Product Number (0265950093, 4541W5, 4541W6), So Verify Code Match Before Installation.

Function And What The Part Does

The Unit Controls The Anti‑Lock Braking System And The Electronic Stability Program. It Monitors Wheel Speed Sensors And Modulates Brake Pressure Via The Hydraulic Pump And Valve Block To Prevent Wheel Lock Up During Braking And To Improve Vehicle Stability In Slip Conditions. The Electronic Controller Interprets Sensor Signals And Operates The Pump And Solenoids As Required.

Replacement And Installation

General Replacement Steps (For Experienced Technicians And Competent DIYers):

• Park Vehicle Securely On A Level Surface And Isolate The Battery Before Starting Work.
• Record Existing Fault Codes And System Status With A Diagnostic Tool.
• Disconnect Electrical Connectors And Remove Any Retaining Brackets Or Covers.
• Carefully Disconnect Brake Lines From The Hydraulic Unit—Prepare To Catch Fluid And Avoid Contamination.
• Remove Old Unit And Install Replacement; Reconnect Brake Lines And Wiring Harness.
• Refill Brake Fluid And Perform A Thorough Brake Bleeding Procedure To Remove Air From The System.
• Use A Manufacturer‑Compatible Diagnostic Tool To Clear Codes, Run Brake Bleed Procedures, And Perform Any Required Coding/Matching Of The New Module To The Vehicle (e.g., PSA/Diagbox Or Equivalent).

Installation Recommendations

• Use Proper Tools And A Suitable Diagnostic Interface Capable Of Performing Module Coding And ESP Calibration.
• Inspect Electrical Connectors And Wiring For Corrosion Or Damage; Repair Or Replace As Needed.
• Replace Brake Fluid After Service And Follow The Manufacturer‑Recommended Bleeding Sequence.
• Protect The Unit From Moisture During Installation And Ensure Tight, Leak‑Free Brake Line Connections.
• Verify System Operation With A Road Test And Diagnostic Scan To Confirm No Active Faults Remain.

Why The Part Most Often Fails

Common Failure Causes Include Corrosion And Moisture Ingress Affecting The Hydraulic Block Or Electronics, Pump Motor Wear, Valve Or Solenoid Malfunctions, And Electrical Problems Such As Damaged Connectors Or Wiring Harness Issues. Heat Cycling And Age Can Also Degrade Internal Electronic Components Over Time.

Additional Notes

This Part Is Frequently Searched By Product Number, So Use The Codes Listed In The Technical Information To Match Fitment. Proper Coding And Bleeding Are Critical After Replacement To Restore Full ABS/ESP Functionality.

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

High-quality Bosch ABS/ESP hydraulic control unit designed as a direct-fit replacement for selected Citroën C4 and Peugeot 307 models. This unit integrates the hydraulic pump, valve block and electronic control to manage braking pressure during ABS and ESP interventions, restoring vehicle stability and safety features. Commonly searched by OEM reference numbers, the module is suitable for professional workshops and experienced DIY mechanics who perform brake-system repairs and replacements.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4; Peugeot 307
• Product Codes: 9663241380; 0265235235; 4541J1
• Additional Numbers: 9661887180; 0265950635; 4541FV; 4541Q7; 4541Q8

Compatibility And Fitment

The unit is intended for installation on various versions of Citroën C4 and Peugeot 307 that use the Bosch ABS/ESP hydraulic module family. Compatibility is most commonly associated with first‑generation Peugeot 307 and Citroën C4 platforms where the listed OEM numbers appear. Always verify the part number stamped on the original unit against the codes above before ordering.

Function And Common Failure Modes

The ABS/ESP hydraulic control unit modulates brake pressure via solenoid valves and a pressure pump to prevent wheel lockup and assist electronic stability control. Typical failure causes include:

• Corrosion And Moisture Ingress: Brake fluid contamination or water penetration can corrode internal valves and electronic contacts.
• Pump Motor Wear Or Electrical Faults: The electric pump or motor driver can fail after long service or voltage surges.
• Hydraulic Contamination: Debris or degraded fluid causes valve sticking and loss of function.
• Physical Damage: Impact from collisions or road debris can damage the block or connectors.

In practice, failures are more likely on higher‑mileage vehicles or cars with neglected brake‑fluid service. Typical service life varies; many original units become problematic after several years and tens of thousands of miles, depending on conditions and maintenance.

Replacement Procedure

Recommended steps for removal and installation (for experienced technicians or skilled DIY):

• Read And Record Fault Codes With A Diagnostic Scanner Before Removing The Unit.
• Depressurize The Brake System And Place The Vehicle On A Stable Lift.
• Disconnect The Battery Negative Terminal To Prevent Short Circuits.
• Carefully Disconnect Electrical Connectors And Label Them If Necessary.
• Loosen And Remove Brake Lines From The Hydraulic Block, Catching Fluid And Preventing Contamination.
• Unbolt The Module From The Body/Bracket And Remove The Unit Together With Any Attached Wiring Harness Section That Comes With It.
• Fit The Replacement Unit, Reconnect Brake Lines Using New Seals If Required, Torque Fasteners To Manufacturer Specs, And Reconnect Electrical Connectors.
• Refill And Thoroughly Bleed The Brake System To Remove All Air (Preferably With A Diagnostic‑Controlled Bleed If Available).
• Clear Fault Codes, Perform ABS/ESP Initialization Or Calibration With A Compatible Diagnostic Tool, And Verify Operation On Road Test.

Installation Recommendations

• Always Disconnect The Battery Before Starting Work To Avoid Damage To The Electronics.
• Use Clean Brake Fluid And Replace Fluid If Contaminated; Contaminated Fluid Shortens The Lifespan Of The Unit.
• Replace Copper Washers/Seals On Brake Lines After Disassembly To Ensure Leak‑Free Connections.
• Perform A Full Brake Bleed And ABS Self‑Test With A Diagnostic Tool After Installation.
• Inspect The Vehicle For Underlying Causes (Corrosion, Water Entry, Faulty Sensors) To Prevent Recurrence.

Why The Part Most Often Fails

Most failures are caused by hydraulic contamination (old or dirty brake fluid) and corrosion of internal valves and electrical contacts. Moisture ingress and long exposure to harsh road conditions accelerate wear. Electrical issues, such as connector corrosion or intermittent wiring faults, as well as pump motor fatigue, are also common. Addressing brake‑fluid service intervals and protecting the unit from water exposure will extend service life.

Notes For Professionals

This module is intended for fitting by qualified technicians or experienced enthusiasts comfortable with brake systems and vehicle diagnostics. After replacement, ABS/ESP systems usually require diagnostic initialization and an ABS bleed sequence to restore full function.