Replace your vehicle’s rigid brake pipe that connects the ABS/ESP hydraulic modulator to the brake circuits. This original-type brake line ensures reliable hydraulic connection between the ABS/ESP unit and the wheel brakes, maintaining proper pressure distribution for safe braking performance.

This brake pipe is intended for professional repair shops and competent DIY mechanics who perform brake-system work. It is a rigid brake line (not a flexible rubber hose) that routes hydraulic brake fluid under high pressure between the ABS/ESP module and the rest of the braking system. Correct installation and thorough bleeding of the hydraulic circuit are essential to restore full braking function and ABS operation.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C4; Peugeot 307
• Product Codes: 4887T0, 4887T1
• Other Numbers: 4887T0 | 4887T1 | NFP (as listed)

Function

The brake pipe provides a rigid, pressure-rated hydraulic pathway from the ABS/ESP modulator to the vehicle’s brake circuits. It transmits brake fluid under pressure to ensure balanced braking and proper ABS/ESP modulation during normal braking and emergency interventions.

When And Why It Fails

Common causes of failure include external corrosion from road salts and moisture, mechanical damage from impacts or chafing, fatigue at bends or fittings, and internal blockage from contaminated fluid or debris. Failure symptoms include visible fluid leaks, reduced brake pressure, a spongy brake pedal, or illumination of the ABS/ESP warning light if the modulator loses hydraulic integrity.

Installation And Maintenance Recommendations

Recommended for installation by experienced mechanics. Key steps and precautions:

• Depressurize the brake system and drain the brake fluid to a safe level before disconnecting lines.
• Use correct flare-nut or banjo fittings and replace sealing washers or crush washers where applicable.
• Avoid kinking or bending the new pipe; follow the original routing and secure with the factory clips to prevent chafing and vibration.
• Torque fittings to manufacturer specifications and inspect for leaks with the system pressurized.
• Bleed the complete brake circuit thoroughly after installation (use pressure, vacuum or hand-bleeding methods). Confirm ABS/ESP function and check for warning lights; perform a controlled road test.
• Use appropriate tools: flare-nut wrenches/line wrenches, brake bleeder, and clean new brake fluid of the correct specification.

Why Professional Fitment Is Recommended

Brake hydraulic work affects vehicle safety. Improper installation or incomplete bleeding can leave air in the system, reduce braking efficiency or cause ABS faults. If you are not experienced with brake hydraulics, have the part fitted by a qualified technician.

Overview

This electric power steering column is a direct-fit replacement used on Citroën C1, Peugeot 107 and Toyota Aygo models. It is compatible with steering assemblies supplied by Jtekt, Denso or Koyo and is offered under common part references such as 45250-0H010-00 and 995-10500, including manufacturer cross-references 4123AV and 4123S8. Designed for technicians and DIY enthusiasts, the column restores electric-assist steering function, improves steering feel and removes faults related to worn or failed column components.

Technical Information

• Manufacturer: Jtekt / Denso / Koyo
• Model: Citroën C1, Peugeot 107, Toyota Aygo
• Product Codes: 45250-0H010-00, 995-10500
• Other Numbers: 4123AV, 4123S8

Fitment And Compatibility

This steering column fits the first-generation Citroën C1 and Peugeot 107 and the equivalent Toyota Aygo platforms that share the same steering architecture. Always verify the part numbers listed above against the unit you are replacing to ensure correct mechanical and electrical mating. The column includes the electric assist motor and associated sensors typically integrated within the assembly.

Installation Recommendations

• Disconnect the battery before starting work and wait the manufacturer-recommended time to disable the airbag system.
• Center the steering wheel and note its position relative to the front wheels. Mark the steering shaft and wheel to preserve alignment during reassembly.
• Remove driver airbag and steering wheel following the vehicle manufacturer’s procedure; then remove trim panels to access column fasteners.
• Support the column while releasing mounting bolts and disconnect electrical connectors carefully to avoid damaging sensor plugs.
• On installation, tighten fasteners to the manufacturer’s torque specifications and reassemble in reverse order. Reconnect the battery only after the column and airbag are secured.
• After replacement, clear any steering-related fault codes and perform steering angle sensor calibration if required by the vehicle — some vehicles may need a diagnostic tool to complete the procedure.

Why This Part Fails Most Often

Electric steering columns can develop faults for several common reasons:

• Wear Of Internal Components: Bearings, universal joints or the collapsible section can wear, causing play or unusual steering feel.
• Electrical Faults: Motor brush wear, Hall sensors, or internal encoder failures can lead to loss of assist or fault codes.
• Connector Corrosion Or Damage: Moisture ingress or damaged wiring at the column connectors may interrupt power or signal paths.
• Impact Damage: Steering column components are vulnerable in collisions; deformation or sensor damage often results from impact.

Practical Notes For Mechanics And DIYers

Technicians will appreciate that the listing includes OE and cross-reference numbers (45250-0H010-00, 995-10500, 4123AV, 4123S8) for fast identification. Replacement is straightforward for a competent mechanic with basic tools, but take care with airbag removal and electrical connectors. If fault codes persist after mechanical replacement, further diagnosis of the vehicle’s CAN network and steering sensors may be required.

This Bosch ABS/ESP hydraulic unit is a direct-fit component for Peugeot 308 vehicles and is commonly searched by its part numbers (0265951176, 9667055880, 4541QJ). The unit integrates the electronic control module, hydraulic pump and valve block responsible for anti-lock braking and electronic stability control. Supplied with a section of wiring harness, it is an efficient replacement option for workshops and DIY mechanics who need to restore ABS and ESP functionality quickly.

Technical Information

• Manufacturer: Bosch
• Model: Peugeot 308
• Product Codes: 0265951176, 9667055880, 4541QJ
• Additional Numbers: 4541QK, 1682607680, 0265251442, 9666957480

Compatibility

Designed for Peugeot 308 vehicles. Buyers frequently locate this part by one of the listed product codes; verify the part number against your vehicle’s paperwork or service documentation before installation.

Function And Symptoms Of Failure

The ABS/ESP hydraulic block modulates brake pressure to prevent wheel lockup and to assist vehicle stability control during braking and emergency maneuvers. Typical symptoms of a failing unit include persistent ABS or ESP warning lights on the dashboard, reduced ABS function (longer stopping distances under heavy braking), pulsating brake pedal at normal speeds, unusual pump noises or intermittent loss of traction control.

Common Causes Of Failure

• Corrosion And Moisture Ingress: Brake fluid contamination or water entry can corrode valves and electrical connectors.
• Electrical Faults: Damaged wiring, connector corrosion or internal electronics failure can interrupt communication with the ABS ECU.
• Hydraulic Wear And Blockage: Debris or degraded brake fluid can clog valves and damage the pump motor.
• Accident Damage: Impact can bend or damage the unit and associated lines.
• Aging And High Mileage: Mechanical wear over time reduces reliability.

Installation Recommendations

Before starting work, always consult factory repair literature for vehicle-specific procedures. General replacement steps:

• Disconnect the negative battery terminal to prevent electrical damage.
• Safely raise and support the vehicle and protect paintwork from brake fluid.
• Depressurize the brake system as specified by the manufacturer.
• Disconnect electrical connectors and remove hydraulic brake lines (capture fluid and cap lines to avoid contamination).
• Unbolt and remove the ABS/ESP unit. Install the replacement, torque fasteners to specification and reconnect lines and wiring.
• Bleed the brake system thoroughly. For full ABS pump priming and removal of air from the hydraulic circuit, use a diagnostic tool capable of running the ABS bleed/activation routine where available.
• Clear fault codes and verify system operation using a suitable diagnostic scanner. Test drive to confirm stable braking and ESP operation.

Recommendation: If you do not have the appropriate diagnostic equipment, have the vehicle checked and the unit commissioned by a workshop with ABS diagnostic capability. Always replace any damaged seals or brake hoses and use fresh, manufacturer-specified brake fluid.

Why This Part Is Often Replaced

The ABS/ESP unit is exposed to harsh conditions (heat, moisture, contaminated fluid) and combines hydraulic and electronic components, so failures are relatively common after high mileage or following coolant/brake fluid contamination and road-salt corrosion. Accidents that deform suspension or body structures can also damage the hydraulic block or its connectors.

Included In Delivery

Hydraulic block with electronic control module and a piece of wiring harness as pictured/described in the listing. Refer to the product codes listed above for exact fitment.

This ABS hydraulic control block is designed for Peugeot 206 applications and compatible Stellantis models carrying the same part numbers. The unit controls hydraulic modulation of the braking system during ABS events and integrates the pump and valve block (hydraulic modulator) with the electronic control to ensure stable deceleration and wheel-slip prevention. Ideal for professional workshops and experienced DIY mechanics who service braking systems on Citroën/Peugeot vehicles.

Function And Typical Symptoms

The ABS hydraulic control block regulates brake pressure at each wheel via solenoid valves and an electric pump under commands from the ABS electronic control. Common symptoms indicating a faulty module include steady or flashing ABS warning light on the dashboard, reduced braking stability during emergency braking, audible pump motor operation after ignition, or brake pressure loss/leakage at the unit. Note that ABS faults can also be triggered by wheel speed sensors or wiring issues; a targeted diagnosis is recommended.

Compatibility And Fitment

Main Fitment: Peugeot 206. Also referenced by Stellantis/Citroën/Peugeot original numbers listed below. Check vehicle part numbers to confirm match before installation.

Technical Information

• Manufacturer: ATE / Stellantis (Citroën/Peugeot)
• Model: Peugeot 206
• Product Codes: 9659136980, 10.0970-1128.3, 10.0207-0068.4
• Other Numbers: 9652342980, 10.0970-1114.3, 10.0207-0036.4, 4541V5, 4541V6, 4541RW, 1682608780

Installation Recommendations

• Work Should Be Performed By A Qualified Technician Or An Experienced Mechanic Familiar With Brake Systems.
• Always Follow Manufacturer Service Procedures. Before Starting, Isolate The Electrical System Where Appropriate And Take Safety Precautions.
• Locate The ABS Hydraulic Unit (Typically Near The Brake Master Cylinder In The Engine Bay), Disconnect The Electrical Connector And Carefully Remove The Brake Lines From The Unit Using Proper Tools To Prevent Damage.
• Cap Brake Lines To Prevent Contamination And Minimize Fluid Loss. Unbolt The Unit And Replace With The Correct Part. Replace Any Sealing Washers Or Crush Rings As Required.
• After Mechanical Fitment, Refill And Correctly Bleed The Brake System To Remove All Air. Use A Proper Brake Bleeding Procedure (Ideally A Pressure Or Vacuum Bleeder) And The Correct Brake Fluid Specified By The Manufacturer.
• Use A Diagnostic Tool To Clear ABS Fault Codes And Run Any Required Self-Tests Or Adaptations. If Codes Persist, Inspect Wiring And Wheel Speed Sensors.
• Check For Hydraulic Leaks And Secure All Fasteners To Manufacturer Torque Specifications.

Why This Part Most Commonly Fails

• Corrosion And Moisture Ingress Causing Electrical Or Hydraulic Failure.
• Wear Or Contamination In The Valve Block Leading To Leaks Or Improper Modulation.
• Pump Motor Wear Or Electrical Faults In The Module Electronics.
• Damaged Or Corroded Connectors And Wiring Harnesses Causing Intermittent Signals.
• Contaminated Or Old Brake Fluid Accelerating Internal Component Degradation.

Additional Notes

The Unit Is Supplied With A Section Of Wiring As Indicated. After Replacement, Perform Full System Checks And Road Test To Confirm Correct ABS Operation And Brake Performance.

Overview

This Bosch hydraulic control block and ABS/ESP pump is a direct-fit safety module designed for Citroën C4 Picasso vehicles. It controls hydraulic pressure to the braking circuits during ABS and ESP interventions, ensuring stable braking performance and vehicle stability under emergency braking or low-traction conditions. The unit is offered with common OEM reference numbers used by Stellantis and Bosch, making it an ideal replacement for workshops and experienced DIY technicians looking for reliable ABS/ESP components.

Key Benefits

• Direct replacement for original ABS/ESP modules specified for Citroën C4 Picasso.
• Restores ABS and Electronic Stability Program functionality when the original pump or hydraulic block fails.
• Includes common OEM numbers in listings for easier lookup and ordering.
• Suitable for professional garages and competent DIY mechanics who can perform safe brake system work and electronic coding where required.

How It Works

The hydraulic control block houses solenoid valves, pressure modulators and an electric pump motor. During an ABS event, wheel speed sensors signal the control electronics to modulate brake pressure via the valve block and pump to prevent wheel lock. ESP interventions use the same hydraulic network to selectively apply brakes and maintain vehicle stability. A fault in any electrical connector, pump motor, valve or internal electronics can disable ABS/ESP functionality and trigger warning lights.

How To Replace

Replacement requires basic mechanical skills and attention to brake-system procedures. Typical steps:

• Park vehicle securely and relieve system pressure.
• Disconnect the negative battery terminal to avoid short circuits and accidental airbag/ECU events.
• Access the ABS unit (usually located in the engine bay near the master cylinder).
• Disconnect the electrical connector and carefully undo hydraulic lines using appropriate flare-nut tools; cap or plug lines to prevent contamination and fluid loss.
• Unbolt the assembly and remove the unit. Transfer any brackets or brackets studs if required by the replacement part.
• Install the new unit, reconnect hydraulic lines and electrical connector, torque fasteners to manufacturer specification where available.
• Bleed the brake system thoroughly. Use a diagnostic tool to run ABS pump activation cycles and perform an electronic bleed if supported. Clear fault codes and confirm correct operation.

Installation Recommendations

• Manufacturer: Bosch components are sensitive to contamination. Use only clean, manufacturer-recommended brake fluid and avoid introducing dirt into the hydraulic circuit.
• Bleeding: After installation perform a complete brake bleed. Preferably use a scan tool to command the ABS pump and valves during bleeding to ensure trapped air is removed from the hydraulic block.
• Electrical Checks: Inspect connector pins and wiring harness for corrosion or damage before reconnecting.
• Safety: Always support the vehicle securely and wear appropriate PPE. Follow vehicle manufacturer procedures for handling brake fluid and for disposal of used fluid.

Why The Part Most Commonly Fails

Common failure causes include electric motor wear on the pump, internal valve sticking, contamination from degraded or contaminated brake fluid, corrosion in hydraulic passages, and electrical connector faults. Long service life combined with exposure to moisture and contaminated fluid increases the likelihood of valve and motor failures. In some cases, repeated ABS activation due to faulty wheel speed sensors can accelerate wear.

Technical Information

• Manufacturer: Bosch / Stellantis (Citroën)
• Model: Citroën C4 Picasso
• Product Codes: 9666199180, 0265951253
• Additional Numbers: 4541JH, 4541JJ, 4541QE, 265951253

Notes For Professionals

Inspect surrounding components such as master cylinder, brake lines and wheel speed sensors when replacing the ABS hydraulic block. Residual contamination or unrelated faults may cause recurrent warning lights after replacement. When possible, use diagnostic equipment to verify proper communication between the ABS module and the vehicle CAN network and to confirm the absence of stored fault codes after installation.

Who Should Fit This Part

Recommended for professional workshops and experienced DIY mechanics comfortable with brake hydraulics and electronic diagnostics. If you are unsure about bleeding procedures or electronic checks, seek assistance from a qualified technician to ensure safe and reliable braking performance.

This electric parking brake (EPB) mechanism is a direct-fit used component for Peugeot 3008 I models. Ideal for professional workshops and experienced DIY mechanics, the unit replaces the hydraulic/electric rear parking brake actuator and restores automatic handbrake operation. Commonly searched by product numbers, the listing includes multiple OEM references to help you find the correct fit: include any of the listed codes when searching (0204706357, 9673094880, 470209, 470212).

Function And Benefits

The EPB mechanism converts driver inputs from the parking brake switch into mechanical clamping force at the rear brake calipers via a small electric motor and gearbox. It provides reliable parking brake engagement, hill-hold capability on some vehicles, and enables automatic release during driving. Replacing a faulty mechanism returns smooth actuation and prevents warning lights or permanent handbrake engagement that can limit vehicle use.

Technical Information

• Manufacturer: Stellantis / Peugeot
• Model: Peugeot 3008 I (First Generation)
• Product Codes: 0204706357, 204706357, 9673094880
• Additional Numbers: 470209, 470212

Installation Recommendations

• Disconnect the battery before starting work and follow the vehicle manufacturer’s safety procedures.
• Work With The Rear Wheel Raised And Securely Supported. Remove Wheel And Access Rear Caliper/Actuator Assembly.
• Remove Interior Trim If Needed To Access Parking Brake Switch/Connector. Unplug Electrical Connector From The Actuator.
• Unbolt The Actuator From The Caliper Or Carrier. Retain Fasteners If They Are Serviceable; Replace If Corroded Or Damaged.
• Install New Unit, Reconnect Electrical Connector And Reassemble. Tighten Fasteners To Manufacturer’s Torque Specifications.
• After Mechanical Fitment, An Initialization/Calibration Procedure With A Diagnostic Tool May Be Required To Set EPB Limits And Clear Faults.
• If You Are Not Equipped With Proper Diagnostic Tools, Commission The Final Calibration To A Workshop With PSA-Compatible Equipment.

Why This Part Commonly Fails

• Wear Of The Small Electric Motor Or Gearbox Due To High Mileage And Frequent Use.
• Corrosion And Seizure Caused By Water Ingress, Road Salt Or Poor Sealing Around The Caliper/Actuator.
• Electrical Connector Corrosion Or Broken Wiring Leading To Intermittent Operation Or Fault Codes.
• Mechanical Seizure Of Caliper Slider Pins Or Brake Pads Causing Excessive Load On The Actuator.

Notes For Professionals And Enthusiasts

When replacing the EPB mechanism, inspect rear brake hardware (calipers, pads, sliders) and the handbrake switch for related issues to avoid repeated failures. Replacement often resolves persistent handbrake warning lights and prevents the vehicle from being immobilized by a stuck parking brake. Keep the listed product codes handy when searching stock or ordering replacement parts to ensure correct matching.

High-quality replacement electronic parking brake (EPB) mechanism for Peugeot 3008 I. Ideal for professional workshops and DIY enthusiasts looking for a direct-fit actuator. Commonly searched by part numbers, this unit restores reliable parking brake operation and eliminates warning lights or failure messages related to the electric handbrake system.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Peugeot 3008 I (First Generation)
• Product Codes: 0204280099, 9684898480
• Other Numbers: 470209, 470212, 9688061780, 0204280126, 204280099, 204280126

Function And Fitment

The electronic parking brake mechanism converts electronic commands from the vehicle control module into mechanical clamping force on the rear brakes, securing the vehicle when parked. This unit is intended for fitment on first generation Peugeot 3008 rear brake assemblies and is compatible with vehicles using the EPB system controlled by the car’s onboard electronics. Customers frequently locate this part by its reference numbers listed above.

Replacement Procedure

Basic replacement steps (for experienced technicians):

• Disconnect The Battery Before Starting Work To Prevent Short Circuits And Protect Electronics.
• Raise The Vehicle Securely And Remove The Rear Wheel To Access The Brake Assembly.
• Remove Any Brake Shielding Or Caliper Covers To Reach The EPB Actuator.
• Unplug The Electrical Connector From The Actuator And Unbolt The Unit From The Caliper/Subframe.
• Transfer Any Required Brackets Or Sensors From The Old Unit To The New Unit If Needed, Then Fit The Replacement Actuator.
• Reconnect The Electrical Connector, Refit Wheels, Lower The Vehicle And Reconnect The Battery.
• Perform EPB Initialization/Calibration Using A Suitable Diagnostic Tool To Ensure Proper Operation (See Notes Below).

Installation Recommendations

• Always Disconnect The Battery Before Removal And Follow Manufacturer Procedures To Avoid Damage To The Unit.
• Use A Service Manual Or Manufacturer Repair Instructions For Torque Settings And Specific Removal Steps.
• After Installation, Calibrate The EPB System With A Diagnostic Tool. If The Vehicle Shows A Parking Brake Fault, Recheck Electrical Connections And Perform An Adaptation Routine.
• Replace Seals Or Fasteners That Appear Corroded To Prevent Water Ingress Causing Early Failure.

Why This Part Fails Most Commonly

• Water Ingress And Corrosion In The Actuator Or Linkages Leading To Seized Components.
• Mechanical Wear Of Gears Or Cable Mechanisms Causing Loss Of Clamping Force.
• Electrical Motor Or Internal Encoder Failure Resulting In Inability To Retract Or Engage The Brake.
• Damage From Impact Or Improper Previous Repairs Affecting Alignment Or Mounting.

Practical Tips For Mechanics

Search By Part Number For Faster Identification. Check The Condition Of The Rear Brake Pads, Calipers And Cables When Replacing The EPB Actuator, Because Related Wear Can Mask As Actuator Faults. Keep The Connector Contacts Clean And Use Contact Cleaner If Corrosion Is Present.

Additional Notes

Unit Shown As Tested Functional In The Original Description. After Fitting, Observe The Parking Brake Operation Through At Least One Complete Engage/Release Cycle And Clear Any Stored Fault Codes With A Diagnostic Tool.

Overview

This Bosch ABS/ESP hydraulic control unit is a direct-fit module designed for Citroën C4 Picasso models. It combines the high-pressure pump, hydraulic block and electronic control functions that manage ABS and Electronic Stability Program interventions. Supplied with original part numbers commonly used when searching for replacements, this unit is suitable for workshops and DIY mechanics who need a reliable replacement to restore braking stability and ABS functionality.

Key Features

• Integrated Hydraulic Block And Pump: Controls brake pressure modulation during ABS and ESP events.
• Bosch Technology: Robust valve and motor design used on Stellantis platforms.
• Direct Replacement: Matches original mounting points and electrical connectors for Citroën C4 Picasso.
• Ideal For Repairs After Pump Or Valve Failure: Restores proper ABS/ESP operation when the hydraulic unit is defective.

Technical Information

• Manufacturer: Bosch
• Model: Citroën C4 Picasso
• Product Codes: 9665106680, 0265950962, 265950962
• Additional Numbers: 4541EY, 4541EZ, 4541QE
• Origin: Unit Removed From Vehicle With Automated (Robotic) Gearbox

Symptoms Indicating Replacement Is Needed

• ABS Or ESP Warning Light Illuminated On Dashboard.
• Intermittent Or Continuous ABS Pump Noise Under Braking.
• Reduced Brake Pedal Feel, Pulsation Or Unusual Brake Behavior During Emergency Braking.
• Frequent Or Unexplained Activation Of The Pump During Normal Driving.

Most Common Causes Of Failure

• Contaminated Or Moisture-Laden Brake Fluid Causing Corrosion Inside The Hydraulic Block.
• Electrical Faults – Corroded Connectors Or Failed Motor/Valves.
• Thermal Stress And Wear After High Mileage Or Heavy Use.
• Related Sensor Failures (Wheel Speed Sensors) Causing Excessive Pump Operation And Premature Wear.

Installation Recommendations

Before Work: Always Disconnect The Battery And Follow Manufacturer Safety Procedures To Avoid Damage To Electronic Systems. Work Should Be Performed By A Qualified Mechanic Or Experienced DIY Technician.

Replacement Steps (General Guideline):

1. Park Vehicle Safely, Chock Wheels And Disconnect Negative Battery Terminal.
2. Access The ABS/ESP Unit (Often Located In Engine Bay) And Carefully Disconnect Electrical Connectors.
3. Cap Brake Lines Immediately After Disconnection To Minimize Fluid Loss And Contamination.
4. Unbolt The Hydraulic Unit From Its Mounting Carrier And Remove It From The Vehicle.
5. Install Replacement Unit, Reconnect Brake Lines And Electrical Connectors, Respecting Manufacturer Torque Values For Line Fittings.
6. Refill Brake Fluid With Correct Specified Fluid And Bleed The Brake System Thoroughly. Use A Diagnostic Tool To Activate The Pump And Perform The Automatic Bleeding Procedure If Available.
7. Clear Fault Codes And Verify Proper Operation Of ABS/ESP Systems During A Road Test.

Additional Recommendations: Replace Brake Fluid And Inspect Wheel Speed Sensors And Wiring While Replacing The Unit. Ensure All Connectors Are Clean And Corrosion-Free.

Notes On Coding And Initialization

After Replacement It May Be Necessary To Perform Initialization Or ABS Self-Tests Using A Compatible Diagnostic Tool. Some Vehicles Require Module Adaptation Or System Bleeding Sequences That Are Best Performed With Manufacturer-Level Equipment.

Why Choose This Part

Part Numbers And OEM Cross-References Included Above Make This Unit Easy To Find For Mechanics Searching By Code. The Bosch Hydraulic Block Is A Common Service Replacement For Citroën C4 Picasso Vehicles And Restores Critical ABS/ESP Safety Functions When The Original Unit Fails.

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)

Product Description

This brake pipe is designed to connect the ABS/ESP hydraulic module on Citroën C4 II and Peugeot 308 T7 models. Supplied under product codes 4888L4 and 4888L5, the part forms a critical section of the vehicle’s hydraulic braking circuit, routing brake fluid between the master cylinder, ABS/ESP module and wheel circuits. It is suitable for professional workshops and experienced DIY mechanics who perform brake system repairs or ABS unit replacements.

Benefits And Application

• Direct Fit For Citroën And Peugeot Vehicles: Engineered to match OE routing and fittings for Citroën C4 II and Peugeot 308 T7.
• Restores Proper Hydraulic Flow: Ensures reliable fluid transfer to and from the ABS/ESP module for correct anti-lock and stability control operation.
• Part Numbers For Easy Search: Commonly referenced by codes 4888L4 and 4888L5, increasing findability in parts catalogs and online searches.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C4 II; Peugeot 308 T7
• Product Codes: 4888L4, 4888L5
• Additional Numbers: No further numbers provided

Why The Part Fails

Brake pipes are exposed to road debris, salt and moisture, which commonly leads to external corrosion over years of service. Corrosion can cause pitting and ultimately leaking at the pipe body or fittings. Mechanical damage from impact, incorrect routing or poor previous repairs can also deform or crack the pipe. Internal blockages or contamination are less common but can occur if foreign material enters the system during maintenance.

Installation Recommendations

• Preparation: Lift and safely support the vehicle. Clean the surrounding area to avoid contamination when opening the hydraulic circuit.
• Tools: Use flare-nut wrenches or proper line wrenches to avoid rounding fittings. Have a torque wrench available to tighten fittings to manufacturer specifications.
• Replacement Steps: Remove the damaged pipe by loosening the fittings at the ABS/ESP module and the mating connection points. Install the new pipe following the original routing, ensuring no sharp bends or contact with moving parts.
• Sealing Elements: Replace any crush olives, sealing washers or fittings as required by the connection design. Do not reuse damaged sealing components.
• Bleeding: After installation, bleed the brake system thoroughly to remove air and restore firm pedal feel. Use the manufacturer-specified brake fluid (commonly DOT4) and follow the correct bleeding sequence for the vehicle.
• Final Checks: Inspect for leaks at all connections, verify correct routing and secure clips, then perform a careful road test at low speed to confirm braking performance.

Service Life And Maintenance Tips

Brake pipes are typically long-life items but will eventually succumb to corrosion or mechanical damage. Regular visual inspections during service, especially in regions with heavy road salt, help catch early corrosion. When any sign of pitting, severe rust, deformation or leakage is found, replace the pipe immediately rather than attempting temporary repairs.

Who Should Fit This Part

Recommended For Professional Mechanics And Experienced DIYers: Replacement requires correct handling of the brake hydraulic system and thorough bleeding. If you are not confident in brake system repairs, seek professional installation to ensure safety.