why does my Volkswagen Golf MK6 (2009-2014) make a grinding noise when braking?

Solution

1. Preparation

• Gather Tools:
  • Socket set
  • Jack and jack stands
  • Torque wrench
  • Brake cleaner
  • C-clamp or brake caliper tool
• Safety Warning: Ensure the vehicle is on a flat surface and securely lifted before working underneath.

2. Remove Wheel

• Loosen lug nuts slightly while the car is on the ground.
• Lift the vehicle using a jack and secure it with jack stands.
• Remove the lug nuts completely and take off the wheel.

3. Inspect and Replace Brake Pads

• Inspect: Check the thickness of the brake pads. If they are worn down to 3mm or less, they need replacement.
• Remove old pads:
  • Remove the caliper bolts using the socket set.
  • Lift the caliper away from the rotor, securing it (do not let it hang by the brake line).
  • Remove the old brake pads from the caliper bracket.
• Install new pads:
  • Apply a thin layer of brake grease to the back of the new pads (if applicable) to reduce noise.
  • Insert the new brake pads into the caliper bracket.

4. Inspect and Replace Brake Rotors (if necessary)

• Check Condition: Look for scoring, rust, or warping on the rotor surface.
• Replace Rotors:
  • If replacement is needed, remove the rotor by unscrewing any retaining screws.
  • Clean the hub surface to ensure proper contact.
  • Install the new rotor, ensuring it is seated properly.

5. Reassemble Brake Components

• Reposition the caliper over the new pads and rotor.
• Reinstall caliper bolts and torque them to the manufacturer's specifications (usually around 25-30 Nm).
• Reinstall Wheel: Place the wheel back onto the hub and hand-tighten lug nuts.

6. Lower Vehicle and Test

• Lower the vehicle off the jack stands.
• Tighten the lug nuts to the specified torque (typically 100-120 Nm).
• Pump the brake pedal several times to seat the pads properly.