San Mateo auto repair

My Car Brakes Are Screeching - What's Wrong?

My Car Brakes Are Screeching - What's Wrong? | Four Car Garage

Hearing a screeching sound every time you hit the brakes can be alarming and annoying. Not only is it disruptive, but it also indicates that something might be wrong with your braking system. Understanding the causes behind this noise is crucial for your safety and car longevity. Let's explore why your car brakes might be screeching and what you can do about it.

Worn Brake Pads

One of the most common reasons for screeching brakes is worn brake pads. Brake pads are designed with a small metal indicator that makes a high-pitched sound when the pads are nearly worn out. This screeching sound is a warning sign that your brake pads need to be replaced soon to maintain effective braking performance. Ignoring this sound can lead to more severe damage to the brake rotors and increase repair costs.

Glazed Brake Pads or Rotors

If your brake pads or rotors become glazed, they can also cause a screeching sound. Glazing occurs when the brake pads get overheated due to excessive use or harsh braking. The pad friction material becomes hard and shiny, reducing their ability to grip the rotors effectively. This causes screeching and can also decrease your braking efficiency, making it essential to address the issue promptly.

Dust and Debris

Dust, dirt, and debris can accumulate on the brake pads and rotors, causing a screeching sound when you apply the brakes. This is particularly common if you drive in dusty or off-road conditions. Cleaning the brakes and ensuring that the pads and rotors are free from debris can often resolve this issue. Regular maintenance and inspections can help keep your braking system clean and functioning correctly.

Brake Pad Material

The material used in your brake pads can also contribute to the screeching sound. Some brake pads are made with harder materials that tend to be noisier. Semi-metallic brake pads, for instance, are known for their durability but can produce more noise compared to organic or ceramic pads. If the noise is bothersome, you might consider switching to a different type of brake pad material.

Lack of Lubrication

Your braking system relies on various components working smoothly together, and lubrication is essential for this. Lack of lubrication in areas like the caliper pins can cause the brakes to produce a screeching sound. Ensuring that all moving parts are adequately lubricated can help reduce noise and improve the overall performance of your brakes.

Issues with the Brake Calipers

Brake calipers play a crucial role in the braking process by squeezing the brake pads against the rotors. If the calipers are not functioning correctly, they might not apply even pressure, leading to uneven wear on the pads and screeching noises. Calipers that are sticking or misaligned can cause significant braking issues, and a professional must inspect and repair them.


Don't let screeching brakes compromise your safety and comfort. Visit Four Car Garage today for a thorough brake inspection and service!

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