PCCB Brake Disc Wear Appearance

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Friction surfaces after normal brake load while driving on roads. No surface fractures present -
Brake discs do not need to be replaced!

Fig 1: Identifying PCCB Brake Discs Without Surface Fractures
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Friction surfaces after a long journey and occasional higher load. Isolated cases of connected surface fractures less than 1 cm²-arrow- .
No replacement necessary as the connected surface fractures are < 1 cm² !

Fig 2: Locating PCCB Surface Fractures
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
End of service life of friction surface or after highest load on a racing circuit.
Replace brake discs if the connected friction surface damage is > 1 cm ²-arrow- . To do this, follow the instructions → Checking Information On PCCB Brake Discs .

Fig 3: Locating PCCB Friction Surface Damage
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The best way to detect a surface fracture is by checking the wear indicators. Based on the wear indicators, this means that at least one wear indicator -arrow- must have a surface fracture of > 50 % (damage > 1 cm² /entire surface of a wear indicator with a surface area of 1 cm² ).

Fig 4: Locating PCCB Surface Burnout On Wear Indicator
Courtesy of PORSCHE CARS NORTH AMERICA, INC.