Basic Information

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.

Checking involves the following:

Visual inspection for surface changes in the brake disc friction surfaces and wear indicators. Indication of wear: Connected surface fracture > 1 cm²-arrow- , without adding up smaller fractures → Checking Information On PCCB Brake Discs .

Fig 1: Locating Connected Surface Fracture
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check surface roughness Rk of brake discs (max. 80 μm permitted) since this affects braking comfort (noises), braking behaviour/pedal pressure and brake-pad service life → Checking Information On PCCB Brake Discs .

Fig 2: Identifying Surface Roughness Of PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check brake discs for minimum thickness -X- . The minimum brake disc thickness (e.g. Min. Th. 37.7 mm) is stamped on the brake-disc chamber → Checking Information On PCCB Brake Discs .

Fig 3: Identifying Minimum Thickness X Of PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Check brake discs for edge damage -see Fig 4- (damage due to improper use) → Checking Information On PCCB Brake Discs .

Fig 4: Identifying Edge Damage On PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.