For ordinary private cars, the front brake pads should be replaced every 30,000 to 50,000 kilometers, while the rear brake pads should be replaced every 60,000 to 80,000 kilometers. The replacement cycle of brake pads and brake discs is not a fixed value and depends on the wear condition of the brake pads. The road conditions are different, and each car owner has different driving habits. The force applied when braking varies, and so does the wear of the brake pads. Whether the car is at a 4S store or a repair shop, if it's time to change the brake pads, the staff will inform you.
If you are a frequent crashes or have a good understanding of cars, you can also make your own judgment on whether it is time to replace the brake pads. On the one hand, it's about the driving experience. If the brake feels too soft when you step on it and you clearly feel that the braking distance is long, you should replace the brake pads in time. If you hear a distinct metallic friction sound (the steel back touching the brake disc) when you step on the brake, it indicates that the brake pads have been exhausted. If the repair shop is close, drive slowly to it. If the repair shop is far away, it is recommended to call a tow truck.