Checking Brake Discs For Edge Damage

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 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 can be necessary on the brake disc friction surfaces due to edge damage.
In such cases, only one brake disc may need to be replaced if the friction area surface of the other PCCB brake disc is still completely OK.

The following criteria apply to edge damage assessment:

Fig 1: Identifying PCCB Brake Disc Edge Damage

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Max. permissible width/depth = 2 mm
Max. permissible length = 10mm
Max. 3 damaged edge areas permissible

Information

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

The following criteria apply to edge damage assessment:

Fig 1: Identifying PCCB Brake Disc Edge Damage

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Max. permissible width/depth = 2 mm
Max. permissible length = 10mm
Max. 3 damaged edge areas permissible