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Squealing Brakes at Low Speed - 2019 RLX Sport Hybrid

0

Mike T. · rep 0 · May 26, 3:57 AM · 1 replies · solved · Question

Vehicle: 2019 Acura RLX Sport Hybrid

Hi everyone,

I've noticed a persistent squealing sound coming from the brakes of my 2019 Acura RLX Sport Hybrid, especially when I'm braking gently at low speeds, like in parking lots or stop-and-go traffic. It's quite loud and embarrassing!

The car has about 40,000 miles on it. I don't feel any pulsing or grinding, just this high-pitched squeal. Could this be normal for regenerative braking, or is it a sign of something else?

Has anyone else experienced this with their RLX Sport Hybrid? Any ideas on what might be causing it and what the fix could be? Thanks for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:57 AM

0

ClearTheCode admin answer:

Squealing brakes on your 2019 Acura RLX Sport Hybrid, especially at low speeds, can be caused by several factors. While hybrid vehicles use regenerative braking, which can sometimes have a slightly different feel, persistent squealing usually points to a conventional braking system issue.

Here are the most common causes:

  1. Brake Pad Wear Indicators: Most brake pads have small metal tabs that make a squealing sound when the pads are worn down to a certain level, indicating they need replacement. At 40,000 miles, this is a very strong possibility, even with regenerative braking extending pad life.
  2. Pad Glazing: If the brake pads have been subjected to excessive heat or improper bedding, they can develop a hard, glassy surface (glazing) that causes squealing. This can sometimes be resolved by re-bedding the pads or lightly sanding them.
  3. Rotor Condition: Uneven wear, rust, or a lip on the edge of the brake rotors can contribute to squealing. Rotors might need to be resurfaced or replaced if they are too thin or warped.
  4. Contamination: Brake pads can become contaminated with dirt, dust, road grime, or even oil/grease, leading to noise. A thorough cleaning of the brake components can sometimes resolve this.
  5. Lack of Lubrication: The contact points between the brake pads, calipers, and shims require proper lubrication with high-temperature brake grease. If this grease dries out or is insufficient, metal-on-metal contact can cause squealing.
  6. Regenerative Braking Interaction: While the primary cause is usually conventional brakes, the transition between regenerative and friction braking can sometimes highlight existing minor issues in the friction braking system.

Diagnostics: There are no specific OBD codes for brake squeal. A visual inspection of the brake pads, rotors, and calipers is necessary. A technician will check pad thickness, rotor condition, and ensure all components are moving freely and properly lubricated.

When to see a shop: It's important to have your brakes inspected by a qualified technician as soon as possible. While squealing doesn't always indicate imminent failure, it's a clear sign that something needs attention. Delaying an inspection could lead to further wear, reduced braking performance, and potentially more costly repairs down the line. Describe the exact conditions under which the squealing occurs.

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