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Persistent Squealing Brakes on my 2018 Q50 Red Sport 400

0

Chris P. · rep 0 · May 22, 5:06 AM · 1 replies · solved · Question

Vehicle: 2018 Infiniti Q50 Red Sport 400

Hey everyone,

I've been dealing with a really annoying issue on my 2018 Infiniti Q50 Red Sport 400. For the past few weeks, I've noticed a persistent squealing noise coming from the brakes, especially at low speeds or when coming to a gentle stop. It's not just a quick squeal; it's pretty constant until I fully stop.

I've got about 45,000 miles on it, and I'm pretty sure the pads and rotors were replaced about 15,000 miles ago with aftermarket performance parts. Could it be something with the installation, or maybe just cheap pads?

It's really embarrassing in traffic. Any ideas what might be causing this, or what I should check first? Thanks for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:06 AM

0

ClearTheCode admin answer:

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

Possible Causes:

  • Improper Pad Bedding: New brake pads need to be properly 'bedded-in' to the rotors. If this wasn't done correctly, or if the process was interrupted, it can lead to noise.
  • Low-Quality or Incompatible Pads/Rotors: Aftermarket performance parts can sometimes be noisier than OEM, especially if they're a more aggressive compound. Also, some pad materials simply don't play well with certain rotor types.
  • Lack of Anti-Squeal Shims or Lubrication: Brake pads typically come with anti-squeal shims, or require a specific high-temperature brake lubricant on the back of the pads where they contact the caliper piston. If these are missing or improperly applied, squealing is common.
  • Glazed Rotors or Pads: Excessive heat can glaze the surface of the pads or rotors, making them hard and shiny, which reduces friction and causes noise.
  • Worn or Loose Hardware: Caliper pins, clips, or other hardware can wear out or become loose, allowing components to vibrate and create noise.

Troubleshooting Steps:

  1. Inspect Visually: Check your brake pads for uneven wear, cracks, or glazing. Look at the rotors for deep grooves, scoring, or discoloration (blue spots indicate excessive heat).
  2. Re-bed the Brakes: If the pads are relatively new, try performing a proper brake bedding procedure. This usually involves a series of moderate to hard stops from varying speeds without coming to a complete stop, allowing the brakes to cool, and repeating.
  3. Check for Shims and Lube: If you're comfortable, remove the wheels and inspect the brake calipers. Ensure shims are present and that there's proper high-temp brake grease on the contact points.

When to See a Shop:

  • If visual inspection reveals significant wear, deep grooves, or damaged components.
  • If re-bedding doesn't resolve the issue.
  • If you hear grinding noises, which indicate metal-on-metal contact and immediate attention.
  • If you're unsure about performing the inspection or re-lubrication yourself. A professional can properly diagnose the source of the squeal and ensure all components are installed correctly and safely.
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