Tools You'll Likely Need:
* Jack and axle stands: Essential for safe working.
* Wheel chocks: For added safety.
* Socket set: Various sizes, including likely a Torx bit for the wheel bolts.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* ABS sensor removal tool: This tool helps avoid damaging the sensor's delicate wiring. A small flathead screwdriver might work, but it risks damaging the sensor.
* Penetrating oil (e.g., WD-40): May help loosen stubborn bolts.
* Clean rags or shop towels: To keep the area clean and avoid contamination.
* New ABS sensor: Ensure you get the correct part number for your specific Peugeot 407 model and year.
* Multimeter (optional): To test the new sensor before and after installation.
* Protective gloves: Recommended to prevent cuts and grease.
Procedure (General Outline):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Jack up the rear of the vehicle and securely support it on axle stands.
2. Remove the Wheel: Remove the wheel bolts using the appropriate socket and carefully remove the wheel.
3. Locate the ABS Sensor: The ABS sensor is usually located on the rear axle housing, near the wheel hub. It's a small, cylindrical component with a wire harness.
4. Disconnect the Electrical Connector: Carefully disconnect the electrical connector from the ABS sensor. Take note of its orientation to ensure correct reconnection.
5. Remove the Sensor: This is the trickiest part. Use the ABS sensor removal tool (or carefully with a small flathead screwdriver) to gently pry the sensor out of its mounting position. Penetrating oil may help if it's stuck. Avoid excessive force, as you can damage the sensor or the axle housing.
6. Clean the Mounting Area: Clean the area where the sensor was mounted, removing any dirt, debris, or rust.
7. Install the New Sensor: Carefully install the new ABS sensor into its mounting position. Ensure it seats correctly.
8. Reconnect the Electrical Connector: Reconnect the electrical connector, making sure it's securely attached.
9. Reinstall the Wheel: Carefully reinstall the wheel and tighten the wheel bolts to the manufacturer's specified torque using a torque wrench.
10. Lower the Vehicle: Carefully lower the vehicle to the ground.
11. Clear ABS Codes (If Necessary): After reinstalling the sensor, you may need to use an OBD-II scanner to clear any ABS fault codes that have been triggered. Some scanners also allow you to test the sensor's functionality.
Important Considerations:
* Bleeding the Brakes: While unlikely to be necessary after replacing just an ABS sensor, you might need to bleed the brakes if there's been significant work on the braking system. Refer to your vehicle manual for procedures.
* Professional Help: If you are not comfortable performing this repair, it is highly recommended to take your vehicle to a qualified mechanic. Incorrect installation can lead to serious safety issues.
* Part Number Verification: Double-check the part number of the new sensor to make absolutely sure it's correct for your vehicle.
This is a simplified guide. Always refer to your Peugeot 407's service manual for detailed instructions specific to your model and year. Remember that safety should always be your top priority when working under a vehicle.
