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Persistent Squealing Brakes on my 2018 Jetta SE

0

Sarah K. · rep 0 · May 22, 4:35 AM · 1 replies · solved · Question

Vehicle: 2018 Volkswagen Jetta SE

Hey everyone,

I've been experiencing a really annoying, persistent squealing sound from my brakes, especially at low speeds or when coming to a gentle stop. It's a 2018 Volkswagen Jetta SE with about 65,000 miles on it.

I had the pads and rotors replaced about 15,000 miles ago, so I'm a bit surprised to hear this again so soon. It's not just when the brakes are cold; it happens pretty consistently after driving for a bit too. The braking performance itself seems okay, but the noise is driving me crazy.

Any ideas what could be causing this? Is it possible the new pads weren't installed correctly, or could it be something else entirely? Thanks for any advice!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:35 AM

0

ClearTheCode admin answer:

Persistent brake squeal can be frustrating, especially after recent service. Here's a breakdown of common causes and what to do:

Common Causes:

  1. Pad Wear Indicators: Most modern brake pads have a small metal tab that scrapes against the rotor when the pads are worn down to a certain point. Even if recently replaced, a faulty or bent indicator could cause premature noise.
  2. Improper Pad Bedding: New brake pads need to be properly 'bedded in' to transfer a layer of pad material onto the rotor. If this process isn't done correctly, it can lead to noise and reduced performance.
  3. Contamination: Grease, oil, or brake fluid on the pads or rotors can cause squealing. This can happen during installation or from external sources.
  4. Low-Quality or Incompatible Pads/Rotors: Some aftermarket pads, especially metallic ones, are known to be noisier. Also, if the pads and rotors aren't a good match, it can lead to issues.
  5. Rust or Glazing: Rotors can develop a thin layer of rust if the car sits for a while, which usually goes away after a few stops. Pads can also become 'glazed' (hardened surface) from overheating, leading to noise.
  6. Loose Components: Caliper bolts or other brake hardware that isn't properly tightened can vibrate and cause noise.

What to Do:

  1. Visual Inspection: Carefully inspect the brake pads and rotors for any obvious signs of wear, unevenness, or contamination. Look for the wear indicator tab.
  2. Re-bedding: If the pads are relatively new, try performing a proper re-bedding procedure. This involves a series of moderate to hard stops from varying speeds to properly seat the pads.
  3. Cleaning: If you suspect contamination, specialized brake cleaner can be used, but be careful not to get it on painted surfaces.

When to See a Shop:

  • If the squealing persists after attempting re-bedding or cleaning.
  • If you notice any changes in braking performance, such as a soft pedal, pulling, or reduced stopping power.
  • If you're unsure about inspecting or working on your brakes. Brakes are a critical safety system, and professional diagnosis is always recommended if you're not comfortable.

A professional technician can properly inspect the brake system, check for proper installation, and diagnose the exact cause of the noise.

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