If the brake disc has cracks, scratches more than 0.4 mm deep, waviness or other damage, it must be replaced.
The brake discs of the front wheels should be replaced in pairs, and the brake pads must also be replaced.
We remove the front wheel and securely fix the car on a factory-made stand.
We turn the steering wheel to the limit in the direction on which the disk is dismantled.
Removing brake pads (see Replacing the brake pads of the front wheels).
With a hexagon "10", we unscrew the two screws securing the guide pads to the steering knuckle.
We remove the guide pad assembly with the caliper from the brake disc..
... and tie them with wire or cord to the front suspension spring to avoid tension on the brake hose.
With a metal brush, we clean the head of the screw securing the brake disc to the front wheel hub from dirt and corrosion.
Using a Phillips screwdriver, unscrew the screw securing the brake disc to the front wheel hub..
... and remove the disc from the hub.
Install the front wheel brake disc in reverse order.
If the brake disc is replaced with a new one, the brake pads must also be replaced.
As a result, the thickness of the brake disc package with brake pads will increase compared to the old parts.
Therefore, before installing the guide pad assembly with the caliper, you will need to drown the piston into the cylinder (see Replacing the brake pads of the front wheels)