Description
Control module, ABS pump, ESP unit, BOSCH ABS block for PEUGEOT 307. With a piece of wiring.
This Bosch ABS/ESP assembly is designed for Peugeot 307 models and combines the hydraulic pump and electronic control necessary for reliable anti-lock braking and electronic stability control operation. Supplied with a section of wiring harness, it is suitable for professional workshops and experienced DIY mechanics who look up parts by product number. Common reference numbers associated with this unit help you find the exact replacement quickly.
Function And Benefits
The unit controls the ABS and ESP systems by processing wheel speed and yaw sensor inputs to modulate brake pressure via the hydraulic pump and valves. Proper operation reduces wheel lock during braking, improves vehicle stability in emergency maneuvers and supports traction control functions. Replacing a faulty module restores full system performance, removes dashboard warnings, and prevents degraded braking behavior under ABS/ESP intervention.
Fitment And Typical Application
Intended For: Peugeot 307. The unit is a direct-type ABS/ESP module used on multiple variants of the 307 platform. Technicians commonly search and identify this part using the OE and Bosch product numbers listed below.
How Replacement Is Performed
- Disconnect The Battery Before Starting Work.
- Locate The ABS/ESP Unit (Usually In The Engine Bay Mounted To The Hydraulic Block Or Close To The Brake Master Cylinder) And Remove Any Covering Trim.
- Carefully Disconnect Electrical Connectors And Label Any Harnesses To Ensure Correct Reconnection.
- Drain Or Contain Brake Fluid As Needed And Loosen Hydraulic Lines From The Unit; Use Suitable Tools To Avoid Damaging Banjo Bolts Or Threads.
- Unbolt The Module From Its Mounting Bracket, Transfer Any Required Brackets Or Braces From The Old Unit To The Replacement If Necessary.
- Fit The Replacement Unit, Reconnect Hydraulic Lines Using New Sealing Washers If Recommended, Reconnect Electrical Connectors And The Supplied Wiring Section.
- Bleed The Brake System Using A Proper Bleeding Procedure (Preferably With A Vacuum Or Pressure Bleeder) To Remove Air From The Hydraulic Circuit.
- Perform Post-Installation Diagnostics And System Initialization With A Suitable Diagnostic Tool To Clear Fault Codes And Verify ABS/ESP Operation.
Installation Recommendations
- Follow Vehicle Manufacturer Procedures And Torque Specs When Reconnecting Hydraulic Lines And Fasteners.
- Always Replace Crush Washers On Hydraulic Connections Where Applicable.
- Bleed Brakes Thoroughly After Installation; Air In The System Can Cause Reduced Braking Performance.
- Use A Diagnostic Scanner To Clear Codes And Confirm Sensor Signals; Some Units Require Initialization Or Adaptation Procedures.
- Before Demounting And Mounting Always Disconnect The Battery To Prevent Electrical Damage To The Unit.
Why This Part Most Often Fails
- Corrosion And Moisture Ingress Into The Hydraulic Block Or Electrical Connectors Causing Pump Or Valve Malfunction.
- Internal Pump Wear After Years Of Operation, Especially On High-Mileage Vehicles Or Cars Exposed To Harsh Conditions.
- Electrical Faults Due To Connector Oxidation Or Damaged Wiring Leading To Intermittent Operation Or Complete Failure.
- Contamination Of Brake Fluid Leading To Valve Blockages Or Accelerated Wear.
- Impact Damage In Accidents That Physically Affects The Unit Or Its Mounting.
Post-Installation Checks
After fitting, ensure the brake fluid level is correct and that the system is fully bled. Run a diagnostic check to confirm there are no stored ABS/ESP fault codes and perform a road test to verify ABS activation and ESP stability intervention. If faults persist, inspect wheel speed sensors and wiring harnesses as they are frequent secondary causes of ABS warnings.
Technical Information
- Manufacturer: Bosch / Stellantis (Used On Peugeot/Citroën Platforms)
- Model: Peugeot 307
- Product Codes: 9661740280, 0265950374, 0265234153, 9649988180
- Other Numbers: 4541J3, NFP
Search By Part Number: Technicians and DIYers often locate this module using the OE or Bosch reference numbers listed above. Including those numbers in your search increases the chance of finding a compatible unit for Peugeot 307 applications.
