
Generally, new brake pads will produce abnormal noises after replacement. As for how long the noise will last, it mainly depends on the type of brake pads, as different types require different break-in periods. Below is relevant information about automotive brake pads: Brake Pad : The effectiveness of a car's braking system is largely determined by the brake pads, which are crucial for vehicle safety. Regular inspection and maintenance are essential. Under normal driving conditions, the brake pads should be inspected every 5,000 kilometers. It's important to check not only the remaining thickness but also the wear condition, whether both sides are wearing evenly, and whether they retract properly. Any abnormalities should be addressed immediately. Brake pads should be replaced when their thickness is reduced to approximately 0.5 cm. Brake Pad Replacement: When replacing brake pads, it is best to use original equipment manufacturer (OEM) parts to ensure optimal braking performance and minimal wear. After replacement, it is crucial to pump the brakes several times to eliminate the gap between the pads and the brake disc. Failure to do so may result in ineffective braking on the first application, which could lead to accidents.

When I first changed my brake pads, I was also constantly worried about noise issues. New brake pads need to gradually break in with the brake rotors, a process that typically takes about 300-400 kilometers or two weeks. Because new pads have a hard coating on the surface, they may produce squeaking sounds during initial friction, especially noticeable with frequent braking in city driving. Last time I changed them, the noise basically disappeared after driving about 300 kilometers. If the noise persists beyond this mileage, you should check if the installation is correct or if the brake rotors are uneven. By the way, different brake pad materials have varying break-in periods—metallic ones tend to squeak longer than ceramic ones. Try to brake smoothly in daily driving and avoid sudden stops to shorten the break-in time.

It's quite common to hear some noise after installing new brake pads – they need time to bed in properly. The normal break-in period takes about 200 to 500 kilometers, so don't worry about occasional squeaking during this time. However, this depends on the brake pad type; those with higher metal content may make noise for longer. From my observation over the years, thoroughly cleaning brake disc dust during installation is crucial, otherwise the noise may persist longer. If the noise continues beyond 500 kilometers, it's likely due to improper installation or brake disc issues. Another common mistake beginners make is performing hard braking immediately after replacement, which actually prolongs the break-in period. In fact, driving more in urban stop-and-go traffic helps the pads make full contact.

My car also made noise for the first few days after the last brake pad replacement, but it became quiet after a week. The mechanic said new pads and old brake rotors need time to adapt to each other, and the noise usually disappears after driving 300-400 kilometers. If the noise persists beyond ten days, it's best to return to the shop to check the installation. Since brakes are crucial for safety, never take them lightly. Now, after replacing brake pads, I always drive smoothly and avoid hard braking. The noise tends to be louder when starting the car cold in the morning, but it fades after driving for about ten minutes. If there's persistent screeching, it could indicate poor-quality brake pads or improper installation, which needs immediate attention.

Having driven for over 20 years and changed many brake pads, my experience is that new pads making noise for 3-5 days up to 10 days is normal. The material makes a big difference - ceramic pads usually quiet down in 2-3 days while metallic ones may take over a week. It largely depends on your driving habits - highway driving helps them bed in faster, whereas stop-and-go traffic actually helps wear them in better. I've seen cases where pads kept making noise for two weeks, only to find it was caused by deep grooves in the rotors. My advice is to pay extra attention to braking performance in the first few days - if you feel uneven braking or metal scraping sounds, don't delay getting it checked. Under normal driving conditions, the noise should subside within about 10 days.

This topic often comes up in our car club discussions. Many members report varying break-in periods for new brake pads. Some experience quiet operation within three to four days, while others deal with noise for nearly half a month. I've summarized a little trick: during the first 200 kilometers after replacement, intentionally apply moderate brake pressure several times to help the pads and rotors mate quickly. Avoid slamming on the brakes suddenly, as that can actually damage the rotors. There's quite a difference in performance between brands - more expensive ceramic pads do break in faster. If the noise persists beyond two weeks, be cautious as it's likely due to improper installation or shim issues. Experienced mechanics also chamfer the edges of the pads, which can reduce the chance of abnormal noises. You might want to give this a try.


