Loud Squeaking from Brakes on my 2018 XC60 T5 Momentum

ClearTheCode admin answer:

Loud squeaking brakes are a common concern, but often indicate a relatively straightforward issue. Here's a breakdown:

1. Causes of Squeaking Brakes:

   • Worn Brake Pads: Most brake pads have a metal wear indicator that makes a high-pitched squeal when the pads are getting thin, alerting you that replacement is needed.
   • Glazed Pads or Rotors: If pads get too hot, they can harden or 'glaze,' reducing their effectiveness and causing noise. Rotors can also develop a glazed surface.
   • Rust or Debris: A thin layer of rust on the rotors (especially after rain or washing) can cause temporary squealing until it's worn off. Small stones or debris caught between the pad and rotor can also cause noise.
   • Improper Installation/Lubrication: If brake components weren't properly lubricated during a previous service (e.g., caliper pins, backing plates), it can lead to vibrations and noise.

2. What You Can Do:

   • Visual Inspection: Carefully inspect your brake pads through the wheel spokes. If the pads look very thin (less than 3-4mm), they likely need replacement.
   • Listen for Changes: Pay attention if the noise changes with harder braking or if it becomes a grinding sound, which indicates metal-on-metal contact and requires immediate attention.

3. When to See a Shop:

   • If the squealing is persistent and doesn't go away after a few stops.
   • If you notice any grinding, which means your pads are completely worn and damaging your rotors.
   • If the vehicle pulls to one side when braking, or if the brake pedal feels different.
   • It's always best to have a qualified technician inspect your brakes if you're unsure, especially given the mileage on your XC60. They can properly diagnose the wear and condition of all brake components, including pads, rotors, and calipers.