How to Tell When Car Brake Pads Need Replacement
2 Answers
Here are several indicators to determine if your car's brake pads need replacement: 1. The dashboard has a brake pad wear limit warning light; when illuminated, it indicates the pads should be replaced. 2. The thickness of brake pads typically ranges between 1-1.5cm (varies by manufacturer). When worn down to less than 3mm, replacement is necessary. Most brake pads have wear limit indicators. 3. If the brake pedal travels deeper than usual (increased braking distance) or feels softer, the pads may be nearing the end of their life. Modern brakes are self-adjusting, so increased pedal travel naturally occurs as pads wear. 4. Reduced brake fluid level in the reservoir. As pads wear, the gap between disc and pad increases. After automatic adjustment, the caliper pistons extend outward, requiring additional brake fluid - thus reducing reservoir levels. 5. Squealing or metallic scraping sounds during braking suggest metal-to-metal contact between pad and disc, signaling immediate replacement is needed.
As someone who commutes by car frequently, I've gained some insights about brake pad issues. The most obvious sign is when you hear squeaking or sharp metal grinding sounds while braking - that means the pads have worn thin and the built-in wear indicators are alerting you. I once experienced longer braking distances during rainy weather and almost rear-ended someone, only to later discover the pads were completely worn out. You can do a simple self-check by peeking through the wheel gaps after parking; if the brake pad thickness is less than about 3mm, it's definitely time for replacement. If unsure, it's safer to have mechanics measure them during regular maintenance. Don't wait until brake failure occurs to regret - safety always comes first. I recommend checking their condition every 10,000-20,000 kilometers, as this concerns everyone's safety on the road.
