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.

Complete ABS/ESP module (hydraulic “cube” with pump and control unit) for Citroën/Peugeot. The unit is particularly suitable for the Peugeot 308 and bears the production designation Bosch 0 265 800 884. Thanks to the exact pairing according to the part numbers (PSA 9666093180, 9660107180, 4541LF, 4541LG)

The

part is dismantled, tested and fully functional. It also includes a piece of cabling for easier assembly or repair of the original volume. This is an original solution that maintains the proper function of ABS and the stabilization system ESP – ie safety features that ensure the stability of the car during braking and avoiding maneuvers.

Typical symptoms of defects of the original unit are the lights of ABS/ESP, error messages on the on -board computer, non -functional pump or intermittent contact in the control part. The replacement of the complete block is a quick and proven solution if the hydraulic part or control electronics are damaged. Before assembly, we recommend comparing the numbers on the label with your original work – avoiding compatibility problems.

Installation usually includes the removal of the holder, disconnecting the brake pipes and the connector, installing a replacement block and subsequent venting of the brake system (ideally with the replacement of the Dot 4 brake fluid). For PSA cars, there is usually basic settings via diagnostics (diagnosis/lexia): telecoding of parameters and calibration of the steering wheel sensor, or pump and valve test. The procedure may vary according to the car equipment.

Technical information

• Manufacturer: Bosch
• Model: Peugeot 308 (T7)
• Product codes: 9666093180, 0265800884 (Bosch 0 265 800 884), 9660107180
• Other numbers: 4541LF, 4541lg

For the correct selection, we recommend that you follow the numbers of the unit (above) and the shape of the connector. If you are unsure of compatibility, check it according to VIN or compare the label of your original episode. This ABS/ESP module is an ideal replacement in the case of an electrical or mechanical failure of the original “cube”.

If you are specifically looking for ABS unit/pump for dog labeled 9666093180, 0265800884, 9660107180 or PSA 4541LF/4541LG, this part is the right choice for professional repair and home service.

This used ABS/ESP control module and hydraulic pump is designed for Peugeot 308 applications and replaces the vehicle’s original ABS block. It controls anti-lock braking (ABS) and electronic stability program (ESP) functions by managing hydraulic pressure and pump operation during braking events. For mechanics and DIY enthusiasts, this unit offers a reliable replacement option when the original module fails or develops hydraulic/electrical faults. Supplied with a length of wiring to ease installation and connection.

Function And Symptoms

The ABS/ESP module monitors wheel speed sensors and modulates brake pressure to prevent wheel lockup and maintain vehicle stability. Typical symptoms of a failing unit include ABS and ESP warning lights on the dashboard, a pulsating or soft brake pedal, audible pump noise when ABS activates, loss of ABS/ESP intervention and stored fault codes related to pump motor, valves or electrical communication.

Technical Information

• Manufacturer: Bosch / ATE (As Marked)
• Model: Peugeot 308
• Product Codes: 0265951870, 9677013480
• Other Numbers: 1680902180, 1680902080, 1607126280, 1607126180, 265951870

Replacement And Installation Recommendations

• Always Disconnect The Battery Before Starting Work To Protect The Module And Avoid Short Circuits.
• Support The Vehicle Securely And Remove The Necessary Trim/Wheel To Access The ABS Unit.
• Before Disconnecting Brake Lines, Relieve System Pressure And Be Prepared To Cap Lines To Prevent Contamination.
• Label And Photograph Electrical Connectors To Ensure Correct Reconnection. Handle Connectors Carefully To Avoid Bent Pins Or Corrosion Damage.
• After Mechanical Installation, Perform A Full Brake Bleed Procedure To Remove Air From The System. Use A Pressure Bleeder Or A Diagnostic Tool Assisted Bleed If Available.
• Clear Any Fault Codes And Verify System Operation. Some vehicles Require Module Coding/Initialization Or Cloning Of EEPROM/Flash Data To Restore Full Functionality.
• Where Coding Is Required, It Is Recommended To Use PSA Diagnostic Tools (DiagBox/Lexia/PP2000) Or Equivalent Equipment To Ensure Proper Initialization.

Why This Part Most Commonly Fails

• Hydraulic Corrosion Or Internal Valve Block Failure Caused By Moisture Or Contaminated Brake Fluid.
• Pump Motor Wear Or Seizure After Prolonged Use, Especially If The Unit Frequently Activates.
• Electrical Connector Corrosion Or Wiring Damage Leading To Intermittent Communication Errors.
• Electronic Control Faults Within The Module Due To Age, Thermal Stress Or Water Ingress.
• Associated Wheel Speed Sensor Failures That Cause Excessive Load Or Error States On The ABS Unit.

Notes For Workshop Use

As A Workshop Technician, Inspect Brake Fluid Condition And The Entire Brake Circuit When Replacing The Unit. Replace Corroded Pipes Or Fasteners And Ensure All Connections Are Clean And Tight. After Installation, Verify That ABS And ESP Lights Are Extinguished And That No Related Diagnostic Trouble Codes Remain.