Checking Thickness Of The Disc Brake Pads

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.

WARNING: Installation of brake pads with the wrong brake pad quality

Longer braking distance
More wear on brake pads

→ Only use the type-specific brake pads listed in the Porsche Parts Catalogue.

→ Replace the brake pads when the brake pad wear indicator light comes on, but no later than when there is a residual pad thickness of 2 mm on each axle.

→ Replace the brake discs on each axle as soon as the brake pad wear limit is reached.

Information

If brake pad wear is indicated by the warning light, the warning contact (sender including wire and plug connection) must also be replaced.
Replacement of the warning contact can be avoided by replacing the brake pads no later than when the pad thickness is 2.5 mm -arrows- .

Fig 1: Identifying Brake Pad Thickness
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Warning contacts must be replaced if the core of the line is worn.
However, if only the plastic part of the warning contact is worn, there is no need to replace it.

NOTE: Removing/fitting wheels

Risk of damage to (ceramic) brake discs

→ Use two assembly pins when removing and fitting the wheel.

→ Carefully guide the wheel towards the wheel hub, thereby preventing any heavy impact on the (ceramic) brake disc.

To check the brake pads, remove the wheels during the maintenance. Before removal/installation of wheel, screw the assembly aids (assembly pins) -see Fig 2-, instead of two wheel bolts, into the wheel hub. During removal, first remove the three remaining wheel bolts and remove the wheel carefully without touching the brake discs.

Fig 2: Identifying Wheel Hub
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Visually inspect the brake pads for wear.