How many kilometers should brake discs be replaced?

[Mia]

Brake discs need to be replaced every 80,000 to 100,000 kilometers. The brake disc is an important component in the automotive braking system and is also a wear-prone part that requires regular replacement. As the vehicle's mileage increases, the brake disc will continuously wear out. Below is an introduction to the braking system: 1. The main components of the braking system include the vacuum booster pump, master cylinder, wheel cylinder, brake pads, and brake discs. Both brake pads and brake discs are wear-prone parts that need regular replacement. 2. The vacuum booster pump provides assistance. When the driver presses the brake pedal, the vacuum booster pump can provide assistance, making it easier for the driver to press the pedal. 3. After pressing the brake pedal, the master cylinder uses brake fluid to push the wheel cylinder, which then pushes the brake pads to clamp the brake disc, thereby slowing down the vehicle. 4. The wheel cylinder is the brake caliper, which contains many pistons.

[VanHailey]

With over 20 years of driving experience, I can tell you that brake disc replacement isn't about fixed mileage. What matters is the wear level. Generally, it's recommended to check the thickness and surface every 50,000 to 70,000 km. If the thickness falls below the manufacturer's standard (e.g., under 18mm), or if cracks/grooves appear on the disc surface, replace it immediately. Drive carefully—avoid sudden braking and heavy downhill loads to extend disc life. Typically, inspect discs every two brake pad changes to ensure proper fit and safety. Don't forget to have technicians measure them during routine maintenance—it's a small cost for major protection, preventing dangerous brake failure in critical moments.

[MacRachel]

As a daily driver, I just replaced my brake discs last month after only a little over 50,000 kilometers. Unlike engine oil, there's no strict requirement for replacement—it mainly depends on driving habits and road conditions. If you do a lot of city driving with frequent stops in traffic, wear and tear will be faster. If you hear unusual noises or feel the brakes shaking, don't wait—get them checked immediately. I usually inspect the edges myself to see if they're smooth; if they're too rough, it's time to replace them. Also, when installing new brake pads, it's cost-effective to address the discs at the same time. Developing good habits, like using engine braking more often, can extend the life of your discs by another 10,000 to 20,000 kilometers—saving money and giving you peace of mind.

[DanielaLynn]

I drive my kids to school every day, and brake issues are my biggest concern. Replacing brake discs shouldn't solely depend on mileage; regular wear inspections are essential. I usually have the repair shop measure the thickness with instruments every 40,000 to 60,000 kilometers. The safety standards are specified in the manual. Driving with less heavy load and avoiding sudden braking can extend their lifespan. If scratches or uneven surfaces are noticed, address them immediately to prevent potential hazards. Safety comes first—don't risk it to save a few hundred bucks; brake failure is terrifying. Remember to replace them in coordination with brake pads to ensure the entire system's reliability.