Volkswagen Golf MK7 (2015-2019) brake warning light on, how to fix it?

Solution

1. Preparation

• Tools Required: OBD-II scanner, brake fluid, jack and jack stands, socket set, torque wrench, brake cleaner, and a multimeter.
• Safety Warnings: Ensure the vehicle is on a level surface and secure before lifting. Always wear safety gloves and goggles.

2. Address Brake Fluid Level

• Sub-steps:
  1. If the brake fluid is low, refill it with the recommended brake fluid (DOT 4).
  2. Inspect for leaks in the brake lines and connections. Repair any leaks found.

3. Replace Worn Brake Pads or Rotors

• Sub-steps:
  1. Raise the vehicle using a jack and secure it with jack stands.
  2. Remove the wheel to access the brake components.
  3. Use a socket set to remove the caliper bolts and detach the caliper from the rotor.
  4. Replace the brake pads if they are worn below the minimum thickness (usually 3mm).
  5. Inspect the rotors for scoring or excessive wear; replace if necessary.
  6. Reassemble the brake caliper and wheel, tightening bolts to manufacturer's torque specifications.

4. Replace Brake Warning Switch (if necessary)

• Sub-steps:
  1. Locate the brake warning switch, typically found on the master cylinder.
  2. Disconnect the electrical connector from the switch.
  3. Remove the switch using a socket or wrench.
  4. Install the new switch and reconnect the electrical connector.