How do car brakes work
When you step on the brake pedal, fluid pressure is transmitted through a pipe and hose system to the brake pads and discs (rotors). The pads clamp onto the discs, applying friction that decelerates and stops the vehicle. Over time, brake parts wear out or become contaminated, making them squeak.
Why are car brakes squeaking?
Below are the most common causes:
1. Worn-out brake pads
Brake pads are constructed of a material that grinds down little by little as you drive. When the pads become worn down, a small metal component within them (a wear indicator) contacts the disc and produces a squeaking noise.
Signs:
• Squeaking sound each time you depress the brake pedal.
• The car is slower to stop.
Fix:
• Replace the brake pads immediately.
• Don't overlook it; worn pads can wear out the discs, which cost more to replace.
2. Dust and dirt on brake pads
Where roads in India are dusty, brake components tend to accumulate fine dust, sand, or mud. It wears down the brakes and produces a squealing noise while braking.
Fix:
• Clean the brake assembly using compressed air or brake cleaner spray.
• Avoid direct washing of brakes with water. Rusting occurs.
Have your brakes cleaned every 5,000–8,000 km, particularly if you drive on dusty roads.
3. Moisture or rain
In monsoon or early mornings, moisture or dew accumulates and forms a thin rust layer on the brake discs. While depressing the brakes, the pads scrape off this layer, resulting in temporary squeaking.
Fix:
• A few stops and the rust is worn off, and this is gone.
• If the sound persists for longer than a day, have it inspected.
4. Glazed brake pads or discs
Brake too hard too frequently, and pads and discs become overheated and glazed, i.e., their surfaces are smooth and shiny. This decreases friction and produces squealing sounds.
Fix:
• Have the pads and discs sanded or replaced.
• Brake smoothly and avoid rapid braking unless absolutely necessary.
5. Lack of lubrication
Brakes contain tiny moving components such as clips, pins, and shims. When these components get dry or rusty, they may produce squeaking sounds.
Fix:
• A professional mechanic can lubricate the parts with special brake grease.
• Never use regular oil or grease because they may decrease braking power.
6. Poor-quality brake pads
Low-cost or local brake pads tend to employ low-quality materials that squeak even when new.
Fix:
• Always purchase branded or OEM (Original Equipment Manufacturer) brake pads.
• They are a little more expensive, but they are longer-lasting and function better.
7. Warped brake discs
When the brake discs become warped (uneven), typically due to overheating, they can generate vibration and squealing noises.
Signs:
• Car vibrates slightly while braking.
• Noises are more pronounced at high speeds.
Fix:
• The discs could be resurfaced or replaced.
• Hard braking should be avoided to avoid warping again.
8. Brake calliper problems
The calliper presses the brake pads against the disc and holds them in position. However, it may get stuck with dirt or rust, leading to uneven pressure and squeaking.
Fix:
• Lubricate and clean the calliper pins.
• Replace the calliper if jammed or leaking.
9. New brake pads
Occasionally, even new brake pads squeak slightly during initial fitting since they require some time to bed in to the disc's shape.
Fix:
• Drive under normal conditions for a couple of days. The noise will go away.
• If not, inspect for installation faults or low-quality pads.
10. Foreign objects trapped
Small pebbles, twigs, or pieces of gravel may become wedged between the pad and disc, particularly on country or broken roads. This will result in a loud, high-pitched squeal or grinding noise.
Fix:
• Pull the car over safely and look over the brakes (if accessible).
• The mechanic can simply dislodge any trash lodged inside.
How to diagnose the problem of squeaky brakes yourself
Here’s a step-by-step guide to figure out what’s wrong:
1. Listen carefully – Does it squeak only when braking or even when not?
2. Observe the weather – Is it happening only in rain or early morning?
3. Check your driving pattern – Do you brake suddenly or often ride the brake pedal?
4. Look through the wheel – You may see rust or dirt on the discs.
5. Check when you last serviced your brakes – It might be time for a clean-up or replacement.
If you’re unsure, it’s always safer to have a professional look at it. Faulty brakes can compromise safety, but our ACKO Drive service centres make repairs quick and simple. Booking a service slot is simple online through the ACKO app or the ACKO Drive website. Our technicians inspect the braking system thoroughly and send you a diagnostic report before beginning the repair. The best part? We pick up the car from your location and drop it off once the service is done.
How to prevent squeaky brakes
Here are some simple tips that can help you avoid this problem:
1. Drive gently. Avoid sudden or harsh braking.
2. Clean brakes regularly, especially in dusty or muddy areas.
3. Use quality parts. Don’t go for cheap brake pads.
4. Service your car on time. Regular check-ups catch early wear.
5. Avoid washing directly on the brake discs with high-pressure water.
6. Replace brake fluid every 2 years for smooth operation.
Final words
If your car brakes are squeaking, don't assume it's no big deal. Some noises are harmless, but others can indicate that your brake pads or discs require service. Most squeaks result from dust, worn-out pads, or dampness and can easily be addressed. But if the squeak persists, have your trusted mechanic check. Driving on faulty brakes is not safe for you or other road users.
Maintaining your brakes clean, installing original parts, and having them serviced often guarantees you safe, quiet, and smooth riding each time you drive.
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