PCCB Brake Disc Wear Appearance

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 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 -
No replacement necessary!

Fig 1: Identifying PCCB Brake Disc Wear Appearance
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Friction surfaces after a long run and occasional higher load. Isolated cases of connected surface fractures less than 1 cm²-arrow- .
No replacement necessary as the associated 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 cm²-arrow- . To do this, follow the instructions → 465402 CHECKING REAR PCCB BRAKE DISC (WEAR ASSESSMENT) - section on "Information".

Fig 3: Identifying Connected 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 approx. 2 cm² ).

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