How Often Should Brake Discs Be Replaced on a New Car?
2 Answers
New car brake discs should be replaced approximately every 70,000 kilometers. The steps for replacing brake discs are: 1. Lift the car and remove the tire; 2. Unscrew the brake caliper bolts, open the brake caliper, and remove the old brake pads; 3. Push the brake piston back in and install the new brake pads; 4. Reinstall the brake caliper, tighten the caliper bolts to the required torque, and reinstall the tire; 5. Press the brake pedal several times to eliminate the gap between the brake pads and the brake disc, allowing the brake piston to reset; 6. Check if the brake fluid pump is functioning properly. Automobile brake discs can be categorized by structure into solid brake discs and ventilated discs, and by material into carbon fiber ceramic brake discs and metal brake discs.
I've been driving for over a decade, and there's really no standard answer regarding when to replace new brake discs. If you usually drive steadily without frequent hard braking, like maintaining a constant speed on highways, the brake discs can last 60,000 to 70,000 kilometers before needing replacement. However, if you live in a mountainous city or have aggressive driving habits with constant braking, they might need inspection as early as 30,000 to 40,000 kilometers. During every maintenance check, I always ask the mechanic to measure the thickness—usually, replacement is needed when it falls below 12 mm. Don’t forget to regularly replace the brake pads too, as worn pads can damage the discs. In areas with frequent rain, discs are prone to rust or faster wear, so early checks are better for peace of mind. When replacing, choosing high-quality materials ensures longer durability—don’t cut corners and risk bigger issues. In short, safety is no small matter; regular checks beat guessing any day.
