What's the reason for the popping sound when braking?

[DeBeckett]

There are many reasons for abnormal noises when braking. Here are some common causes: 1. Popping sound after rainy days: This occurs because the brake disc and brake pads stick together due to rust. Usually, stepping on the brakes a few times after driving will wear off the rust on the brake disc. 2. "Clicking" sound during emergency braking: This is caused by the activation of the ABS system. When ABS is working, it's equivalent to rapid-frequency pumping of the brakes. You may feel strong vibrations in the brake pedal and hear a "clicking" sound from the master cylinder. Normally, this will disappear on its own after a few hard brakes or a few days of driving.

[CarmenLynn]

The brake makes a puffing sound. I've been driving for over 20 years and often encounter this issue. It's usually caused by brake pads not being properly bedded in or small stones getting stuck, producing a puffing noise when braking, especially during rainy seasons or in dusty conditions. Uneven wear or excessively thin brake pads can also cause this, and older cars are more prone to rust or uneven rotor surfaces, which create noise during friction. It's recommended to first find a flat area and lightly press the brakes a few times to see if the noise disappears; if it persists, you'll need to remove the wheel and check if the pads still have 2-3 mm of thickness—replace them if they're too thin. If there are deep grooves on the rotor, they may need resurfacing or replacement. Don't delay—safety comes first. If the braking distance increases, it could be dangerous. It's best to have a professional inspection at a shop—spending a little money now can save you worry later.

[StEmiliano]

I often encounter the 'popping' sound from the brakes on my car, which is quite annoying. Possible causes include uneven brake disc surfaces or accumulated dust and dirt, which can start making noise when splashed with water or sand while driving. Misaligned brake pads or foreign objects getting stuck can also produce popping sounds, especially during the break-in period after installing new pads. I've discussed this in modification groups—some people's aggressive braking habits can worsen the issue. For inspection, you can gently clean the disc and pad area with pliers, but if the noise persists, parts replacement is likely needed. Don't take safety lightly; loud noises can distract you. Get it checked at a 4S shop or local repair shop—it's affordable and could save your life.

[CourtneyFitz]

Squeaking noises are mostly caused by issues with the brake pads and discs. If it's a new car occasionally making noise, it might be due to high humidity or dust accumulation—try wiping the disc surface. For older cars, such noises usually occur when the pads are worn or the disc surface is severely scratched; ensure proper alignment when replacing new pads. It could also be due to loose calipers or air in the brake lines. It's recommended to first stop and check the wheel area for any foreign objects or pump the brakes a few times to bleed air. For safety, if the noise persists continuously, don't wait—take it to a repair shop for a more reliable fix.