How to Tell if Brake Pads Are Worn Thin?
4 Answers
Visually inspect the brake pads to see if they have become thin. When the thickness of the brake pads is only about one-third of the original thickness (approximately 0.5 cm), they need to be replaced. A new brake pad is generally about 1.5 cm thick, and the thickness gradually decreases with friction during use. Below is an introduction to brake pads: 1. Brake pad thickness: The standard thickness of brake pads is generally about 1.5 cm. As the car is used and braking operations are performed, the thickness decreases due to friction. The critical thickness for brake pads is usually around 2-3 mm. If the brake pad thickness is less than 3 mm, it must be replaced. 3. How to check brake pads: The thickness of brake pads can be visually inspected. Some brake pads can be seen through the gaps in the wheel hub. If the brake pads have worn down to one-third of the standard thickness, it is recommended to replace them.
I recently experienced thin brake pads, mainly hearing a sharp squeaking sound while driving, especially when applying the brakes. This is the sound of the metal wear indicator touching the brake disc, reminding you it's time to replace them. Then, I noticed that the braking distance increased. For example, a car that usually stops within 5 meters now takes 6-7 meters to come to a halt. Additionally, the braking felt less smooth, with slight vibrations or shakiness underfoot. These signs prompted me to visit the repair shop immediately. They measured the thickness for me—new brake pads are generally around 10 mm, and if they're below 3 mm, they should be replaced. Remember, don't ignore these warnings, as they could lead to brake failure or accidents. I recommend checking them every six months or 10,000 kilometers, especially for cars frequently driven in urban areas.
As a car owner, I mainly rely on the vehicle's built-in warning system to check if the brake pads are worn. Many new cars have a dashboard warning light, similar to the brake warning light, which indicates it's time for an inspection. Some vehicles are equipped with wear indicators that produce a metallic grinding noise or sound when the brake pads are worn down to a certain level, which can be felt directly near the wheels. I usually take a quick look through the wheel gaps when washing the car or during simple maintenance—if the brake pads appear visibly thin or the metal components are exposed, they need replacement. Also, keep an eye on the brake fluid level, as wear can affect the hydraulic system. I make it a habit to check every three months to ensure safe driving. Don't delay replacing them; worn brake pads not only reduce braking efficiency but also waste fuel and increase risks. Addressing it early saves both hassle and money.
I've driven quite a few older cars and learned simple methods to check brake pad thickness. First, listen for sounds: if you hear a scraping sensation or high-frequency noise when braking, it's likely worn thin. Next, observe braking response: if the car reacts sluggishly or requires more force to stop when gently pressing the pedal, it indicates significant wear. Finally, go by feel: when there's dust on the wheels, run your finger along the edge of the brake pad—if it feels sharp or thin (less than 5mm), it's time for replacement. Remember, these checks require no special tools and can be done routinely. I usually remind myself to inspect every 5,000 kilometers to avoid road issues. The braking system is your first line of safety defense—never neglect it.
