If you’ve noticed any unusual noises when applying the brakes such as squealing, grinding or clicking, then it’s important to get the car checked by a mechanic straight away. In this article, we’ll be discussing 7 common causes of brake noises, what they mean, and how to fix them.
Common Causes of Brake Noise
- Worn brake pads
- Worn brake discs
- Loose calipers or brake pads
- Glazed pads or discs
- Poor lubrication
- Debris caught in the pads
- Incorrect brake pad installation
Let’s take a look at each of these causes in more detail.
Worn Brake Pads
One of the most common reasons why you may be experiencing an unusual sound when applying the brakes, is due to worn brake pads. This often sounds like a very high-pitched squealing noise indicating that the pads have reached their wear limit.
If you hear a grinding sound, this is a serious indication that the pads have worn down completely. In this case, do not drive the car and arrange for the vehicle to be collected and checked by a local garage.
In the UK, the minimum brake pad thickness required to pass an MOT is 1.5mm. However, it is recommended to replace the pads when they reach 3mm to ensure optimal braking performance. It’s recommended to check the brake pads at least every 10,000 miles or annually. This can be done as part of a full service which should be performed at the same interval.
Brake pads generally need replacing after every 20,000 to 40,000 miles, and the wear can depend on several factors including:
- Driving style/ aggression
- Pad material
- Stop/ start traffic vs motorway driving
- Vehicle type and load
Worn Brake Discs
Another very common reason for unusual brake noise, is worn discs. Again this can sound like a grinding or squealing sound.
There’s no standardised brake disc limit in the UK, as this will vary between manufacturers. Typically brake discs which have worn down by 1-2mm from new should be replaced. The manufacturer’s specified thickness will be stamped on the hub so it can be checked during an MOT.
It’s important to get the car serviced regularly so the brake discs can be checked for wear and replaced accordingly. Most cars need their brake discs replacing every 30,000 to 50,000 miles. Again this depends on the vehicle itself and driving habits.
Loose Calipers or Brake Pads
If you’re experiencing a scraping or rattling sound, particularly combined with a juddering sensation felt through the brake pedal, then this could be an indication of a loose caliper or brake pad. This issue is definitely less common than worn brake discs and pads, but it is vital to get it checked immediately as it means the vehicle is not safe to drive on.
Glazed Pads or Discs
Having glazed brakes, refers to overheating of the pads or discs and sounds like a high-pitched squeal accompanied by a spongy sensation when hitting the brake pedal. Generally this is caused by aggressive driving, and causes the material to turn smooth and shiny, resulting in a dramatic decrease in stopping power. If the glazing is severe, then the brake pads and discs may need to be replaced.
If you frequently drive on track, or have experienced glazed brakes, then you may need an upgrade to prevent this issue from happening in future. Speak to your mechanic for their advice on this problem.
Poor Lubrication
A creaking sound when braking could indicate a lack of lubrication between the caliper slide pins. This will cause them to stick and can result in an unusual sound. It’s important to get this fixed as soon as possible as it can cause the brakes to overheat, and lead to uneven wear and potentially more costly repairs.
Debris Caught in the Brakes
Another possible cause for brake noise is debris getting caught between the brake pad. The most common culprits are small stones and bits of gravel, and it often sounds like a grinding or scraping sound is being produced. Again it’s vital to get this looked at immediately as it could be resulting in a dangerous decrease in braking performance.
Incorrect Installation
Finally, a possible but rare cause of brake noise is incorrect installation of the brake pads. The type of noise can vary from squealing to grinding and even a rattling or clicking sound depending on the issue. If you’ve recently had new brake pads or discs fitted and are noticing an unusual noise, take the vehicle back to the mechanic or to a new garage to investigate the problem.
Book a Brake Check in Worcester
If you notice any unusual noises when applying the brakes, here at Recharged Automotive in Worcester, we can check them to identify and fix the issue. Get in touch by calling 01905 464812 to discuss your vehicle’s issue.