At what level of wear should car brake pads be replaced?

[AshlynRose]

Car brake pads should be replaced when worn down to less than 3 millimeters. Brake pads, also known as brake shoes or brake linings, are small in size but serve as crucial wearable components in the active safety system. As consumable parts, brake pads gradually wear during use and must be replaced when reaching their wear limit position, otherwise braking effectiveness will be reduced, potentially creating safety hazards. When brake pads reach their wear limit, the warning indicator will contact the brake disc, producing continuous alert noises. When the brake pad thickness approaches this indicator, vehicle owners should prepare to replace them promptly. There's no strict replacement interval for brake pads as it depends on driving conditions and habits, but generally replacement should be considered after approximately 60,000 kilometers of driving, with subsequent inspections every 3,000 kilometers.