Scratches on brake discs are a common phenomenon in the use of cars, but it does not necessarily mean that there is a quality problem with the brake discs themselves. The formation of scratches may be caused by various factors, including brake pad material, driving habits, environmental factors, etc. The following is a detailed analysis of the causes of brake disc scratches:
1. Material issue of brake pads
The material of brake pads has a direct impact on the wear of brake discs. If the material of the brake pads is hard or contains metal particles, these particles may scratch the surface of the brake disc when rubbing against it. In addition, uneven distribution of metal components in brake pads may also lead to scratches. Therefore, choosing high-quality and uniformly made brake pads can reduce the occurrence of scratches.
2. Quality issues with brake discs
The quality of brake discs can also affect their service life and wear condition. If the brake disc material is uneven or the processing technology is rough, scratches may occur during high-temperature and high-pressure braking processes. Therefore, choosing well-known brands and reliable quality brake discs is an effective way to reduce scratches.

3. Driving habits
The driving habits of car owners can also affect the wear and tear of brake discs. Frequent sudden braking and stopping behaviors can increase the wear of brake discs, leading to the formation of scratches. Therefore, developing good driving habits and avoiding frequent sudden braking can effectively reduce scratches on the brake disc.
4. Environmental factors
Brake discs are prone to chemical reactions such as oxidation and corrosion when used in harsh environments such as high temperature and humidity, resulting in scratches. Therefore, try to avoid parking the vehicle for a long time in harsh environments, regularly clean and maintain it, and keep the brake discs clean and dry.
5. Other factors
Foreign object inclusion: Foreign objects such as sand and stones mixed between the brake disc and brake pad may scratch the surface of the brake disc during braking.
Brake system malfunction: If there is a malfunction in the brake system, such as problems with the brake pump, brake pipeline, or brake oil, it may cause uneven braking force, resulting in uneven wear of the brake disc and scratches.
There are various reasons for the formation of brake disc scratches, which are not solely caused by brake disc quality issues. Scratches may occur due to factors such as brake pad material, driving habits, and environmental conditions. Therefore, car owners should start from multiple aspects, choose high-quality brake pads and discs, develop good driving habits, regularly inspect and maintain the brake system to reduce scratches and extend the service life of brake discs.