20 19 BMW 5 series 530li vehicle has traveled about 10000 km. It will shake when braking. When braking at high speed, the brake pedal will vibrate and produce friction. What is the reason? Through online search, it is not uncommon to find that the problems you encounter are still common problems of BMW cars. Open the link and you will find that most of the problems are caused by the deformation of the brake disc. The solution is to replace the brake disc.

The day before yesterday was around 1 the next afternoon, but I didn't receive it until two o'clock. I reconfirmed that it is to replace the brake disc and brake disc. Brake discs are replaced free of charge during the warranty period, but brake pads are consumables, so I have to buy them at my own expense.

There are many people and cars on weekends, but when the cars enter the workshop, they have to queue up to confirm the completion of the project at 2: 30 pm. The after-sales consultant told me that it would be finished at 5: 30. ...

Fast forward. After re-testing, the maintenance technician confirmed the situation I described, then drove the car to the station and hoisted it for maintenance.

Although the vibration can be obviously felt during the trial operation, the brake disc belongs to the warranty item. BMW has a set of strict testing standards, which can only be replaced after reaching the standard, so it still needs to be measured by instruments.

Before the photometry is completed, the camera must be used to record, the instrument must be fixed on the brake disc, and then rotated to photograph the swing range of the pointer.

Finally, it is determined that the problem lies in the right brake disc, and the pointer swings greatly during rotation, indicating that there is a certain height difference on its surface, but it is difficult to find it with naked eyes or hands.