Checking Thickness Of Front Brake Pads

→ The brake pads must be replaced on each axle when the brake pad warning indicator lights up, but no later than when there is a residual pad thickness of 2 mm.

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: Checking Brake Pads 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. 

• Checking brake pads for wear during intermediate maintenance: 

  Visually inspect the brake pads for wear. There is no need to remove the wheels unless the brake fluid needs to be changed at the same time. 

  Outside of brake pad: Visual inspection through the cut-outs in the rim.

  Inside of brake pad: Visual inspection from below with vehicle raised.

  A mirror can also be used as an aid -arrow-  .

  Fig 2: Checking Brake Pads Using Mirror

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
• Checking brake pads for wear during routine maintenance: 

  Check the brake pads for wear with the wheels removed.

  Preliminary work: Remove wheels → 440519 REMOVING AND INSTALLING WHEEL .