why is my Volkswagen Golf MK7 (2015-2019) making a grinding noise when braking?

Solution

1. Preparation

• Tools Required: Jack, jack stands, lug wrench, torque wrench, brake cleaner, socket set, and safety goggles.
• Raise the vehicle securely on jack stands and remove the wheels.

2. Inspect and Replace Brake Pads

• Sub-steps:
  1. Remove the caliper bolts using a socket wrench and carefully slide the caliper off the rotor.
  2. Inspect the brake pads for wear; replace them if the friction material is below the manufacturer's specification (usually 3 mm or less).
  3. Clean the caliper bracket and sliding pins with brake cleaner.
  4. Install new brake pads, ensuring they are oriented correctly and lubricating the backing with anti-squeal grease.

3. Inspect and Replace Brake Rotors (if necessary)

• Sub-steps:
  1. Check the rotors for scoring or warping using a straight edge or caliper.
  2. If damaged, remove the rotor by unscrewing the rotor retaining screws and sliding it off the hub.
  3. Install the new rotor, ensuring it is seated properly against the hub.

4. Reassemble Brake Components

• Sub-steps:
  1. Reattach the caliper over the new pads and rotor, securing it with the caliper bolts.
  2. Torque the caliper bolts to the specification provided in the manufacturer’s service manual (usually around 25-30 Nm).
  3. Reinstall the wheels and torque the lug nuts to the manufacturer's specifications (usually around 120 Nm).

5. Final Checks

• Sub-steps:
  1. Refill or bleed the brake fluid if necessary.
  2. Lower the vehicle and pump the brake pedal to seat the pads against the rotors.
  3. Test the brakes at low speed to ensure proper functionality and listen for any noises.