What are the symptoms when brake pads need to be replaced?

[Nate]

The symptoms when brake pads need to be replaced are: 1. The thickness of the brake pads is only one-third of the original; 2. There is abnormal noise when lightly applying the brakes; 3. The braking response is slow, and the braking force becomes weak. The method to replace car brake pads is: 1. Lift the car and remove the tire; 2. Unscrew the fixing screws on the brake caliper and remove the brake caliper; 3. Remove the old brake pads and push back the brake caliper piston; 4. Clean the installation bracket of the brake disc and install the new brake pads. Car brake pads, also known as car brake linings, refer to the friction materials fixed on the brake drum or brake disc that rotates with the wheel.

[DeCharlie]

When it comes to the symptoms of needing to replace brake pads, I've been driving for 20 years and have plenty of experience. A common sign is hearing sharp, screeching friction noises when braking, like metal scraping, which warns you they're almost worn out; another obvious feeling is increased braking distance—where a light tap used to stop the car smoothly, now you need to press harder, especially during emergency braking, with noticeably slower response; occasionally, you might also feel the brake pedal shaking, accompanied by slight vibrations in the steering wheel, more noticeable when going uphill or turning; during a visual inspection, if the brake pads are as thin as paper or the wear indicators start making noise, you must act immediately. Last time I delayed it a bit too long and nearly caused a rear-end collision—not only dangerous but also costing more to replace the brake discs. I recommend getting a professional inspection every 20,000 kilometers. Frequent braking in city traffic wears them out faster—safety should never be taken lightly!

[MacAnastasia]

I just bought a car recently, and for the past few days, I've been hearing a screeching sound every time I brake—it's terrifying! After doing some research, I learned that it's a sign to change the brake pads. For example, the stopping time has noticeably increased on the highway—it used to take 5 seconds to stop, but now it takes 6-7 seconds, which is quite dangerous. Also, when stopping at a red light, the pedal feels stiff and lacks power. The noise is even louder when starting or driving at low speeds. As a new driver, I thought this was a big deal, so I asked a mechanic, who said brake pads should be checked every 20,000-30,000 kilometers for wear. I'm planning to take my car in for an inspection—don't underestimate these small issues, as they could lead to serious trouble if ignored. Spending a little extra time on routine maintenance can prevent many accidents, and driving with peace of mind is what matters most.

[OCalvin]

As a car enthusiast, I have some knowledge about brake systems. There are mainly three symptoms: when the brake pads are severely worn, a high-pitched metallic screeching sound occurs, which is the wear indicator giving a warning; decreased braking performance, feeling less resistance when pressing the pedal and increased stopping distance; in extreme cases, the brake discs overheat and vibrate, affecting steering. Actually, the normal thickness is above 10mm, and they should be replaced when reduced to 3mm. I've measured them with a caliper myself—too thin and they can damage the discs. Regular inspections are key, usually every 20,000 kilometers or during a service, have a technician check the thickness. Don't wait for the warning light to come on, as it might indicate a more serious issue. Simple maintenance extends their lifespan, making driving smoother!