This guide provides a step-by-step walkthrough for replacing the rear brake pads on a Vw B6 Passat. The entire process, from start to finish, took under two hours, including time for documentation. This DIY guide assumes you have some mechanical knowledge and the necessary tools.
Tools and Materials
Before you begin, gather the following:
- Jack and jack stands
- Wheel chocks
- 15mm wrench
- 13mm socket
- Large C-clamp or disc brake piston spreader
- Battery charger
- Computer with VAG-COM diagnostic software and cable
- Lug nut wrench (17mm socket recommended)
- Torque wrench
- New rear brake pads
Important: A battery charger must be connected throughout this procedure to prevent error faults in the car’s electronic systems.
Step-by-Step Instructions
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Prepare the Vehicle: Securely chock the front wheels. Using the designated jack point, lift the rear of the car and place it on jack stands, ensuring stability. Remove both rear wheels.
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Open the Rear Calipers: The VW B6 Passat utilizes electronically actuated rear calipers. Connect the VAG-COM to the car’s OBD-II port and follow the Ross-Tech instructions for opening the rear calipers. This involves accessing specific modules within the VAG-COM software and initiating the opening sequence. Ensure the battery charger is connected before starting this process.
You’ll hear the caliper motors working. Monitor the measuring blocks in VAG-COM to confirm the calipers are fully open.
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Remove the Calipers: Once the calipers are open, use a 13mm socket and 15mm wrench to remove the two caliper retaining bolts. Carefully set the caliper aside, avoiding stress on the brake line.
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Remove Old Brake Pads: Remove the old brake pads. The inner pad may require some force to dislodge.
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Compress the Piston: Open the brake fluid reservoir and cover it with a rag to prevent spills. Using the C-clamp or piston spreader, carefully compress the caliper piston straight back into the bore. Do not rotate the piston.
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Install New Brake Pads: Install the new brake pads, ensuring the retaining clips are properly engaged.
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Reinstall Calipers: Reattach the calipers using the retaining bolts and torque to the manufacturer’s specification.
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Close and Test Calipers with VAG-COM: Using VAG-COM, follow the Ross-Tech procedure for closing and testing the rear calipers. This ensures proper functionality and resets the electronic parking brake system.
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Final Steps: Disconnect the VAG-COM and battery charger. Reinstall the wheels and torque the lug nuts to specification. Perform a test drive, gradually applying the brakes to bed in the new pads according to the manufacturer’s recommendations.
Replacing the rear brake pads on a VW B6 Passat requires the use of VAG-COM due to the electronic parking brake system. This guide simplifies the process, making it achievable for the DIY enthusiast. Remember to consult your owner’s manual for specific torque specifications and always prioritize safety.
