When to Replace Brake Pads?
4 Answers
Brake pads should be replaced after the car has traveled 80,000 kilometers or every 4 years, but the replacement time may vary depending on the vehicle's usage. Brake pads are a crucial component of the automotive braking system, consisting of a steel plate, friction material, and an insulating layer. They achieve braking by squeezing the brake disc to create friction during braking. The following symptoms indicate that it's time to replace the brake pads: 1. When the thickness is reduced to below 0.5cm, a new brake pad should be installed; 2. Sound: If the car produces squealing or hissing noises during braking, it's time to replace the brake pads; 3. If you feel that the braking is weak, the brake pedal feels heavy, or the braking distance is too long, new brake pads should be installed.
I've been driving for over ten years, and the most reliable signal for changing brake pads is when they become thinner. New brake pads normally have a thickness of about ten millimeters, and when they're worn down to just three millimeters, it's time to replace them immediately. Otherwise, they'll start making noise due to friction while driving. Many cars have built-in wear indicators—when you hear a continuous squealing sound while braking, that's a reminder to change them. Additionally, noticeably longer braking distances or a soft, spongy feeling when braking are also warning signs. I recommend getting them checked by a professional at least every 20,000 kilometers, especially since city traffic with frequent stops and starts wears them out faster. Ignoring this not only risks damaging the brake discs but also increases the chance of accidents—safety comes first! Developing a habit of avoiding sudden braking can also help extend their lifespan.
From a safety perspective, I'm particularly concerned about the timing of brake pad replacement, especially when driving on highways. Generally, replace by mileage: most vehicles should have them inspected every 30,000 kilometers or so, and replaced immediately if severely worn. If brake pads wear out too quickly, the noise is a warning—that screeching sound isn't dust, it's metal-on-metal friction, and delaying replacement could lead to brake failure. I've experienced slippery roads during rain where the brakes skidded, all because I didn't replace the pads in time. In daily driving, frequent hard braking accelerates wear; keeping regular maintenance records of mileage is crucial to avoid surprises. During each service, have the technician check the thickness—replace without hesitation if it's below 3mm. Don't skimp on this small expense; a major accident would cost far more! Keeping your vehicle in top condition gives you peace of mind while driving.
The timing for replacing brake pads mainly depends on two factors: thickness and sound. They should be replaced when the normal thickness wears down to about 3 millimeters. You can measure this yourself with a ruler or caliper, or listen for screeching sounds when braking. If the vehicle's warning light comes on, it's also a sign they need replacement. I recommend checking them every 20,000 to 40,000 kilometers, depending on driving habits: city driving with frequent traffic jams causes faster wear, while highway driving is slightly slower. Don't overlook this during every maintenance check—it's simple and ensures safety. Delaying too long not only makes pad replacement more expensive but may also damage the brake discs. Developing a habit of regular checks keeps your mind at ease and ensures safe driving.
