Checking Brake Discs For Edge Damage

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2019 Porsche 911, 2018 Porsche 911, 2017 Porsche 911, 2016 Porsche 911, and 2015 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Information

Irrespective of wear, a brake disc change may be necessary due to edge damage on the brake disc friction surfaces.
In such cases, only one brake disc may need to be replaced if the friction surface of the other PCCB brake disc is still perfectly OK.

Fig 1: Locating PCCB Brake Disc Edge Damage Area
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Max. permissible width/depth = 2 mm
Max. permitted length = 10 mm
Max. 3 damaged edge areas permissible