Front Brake Pad, Brake Caliper & Brake Rotor: Inspection

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BRAKE CYLINDER AND FRONT DISC BRAKE PISTON
1. Check the cylinder bore and piston for rust or scoring.
  If necessary, replace the cylinder and piston.
CHECK PAD LINING THICKNESS
1. Using a ruler, measure the pad lining thickness.
  Standard thickness: 11.5 mm (0.453 in.)
  
  Minimum thickness: 1.0 mm (0.039 in.)
  
  If the pad lining thickness is equal to or less than the minimum, replace the pad.
  
  Fig 1: Measuring Pad Lining Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK DISC THICKNESS
1. Using a micrometer, measure the disc thickness.
  Standard thickness: 32.0 mm (1.260 in.)
  
  Minimum thickness: 30.0 mm (1.181 in.)
  
  If the disc thickness is less than the minimum, replace the disc.
  
  Fig 2: Measuring Disc Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002