Front Disc Brake Pad On-Vehicle Inspection
Inspect pad linings periodically according to maintenance schedule whenever wheels are removed (for tire rotation or other reason). Take a look through each end and inspection hole of caliper and check lining thickness of outside and inside pads.
If lining is worn and its thickness ("a" in figure) is less than limit, all pads must be replaced at the same time.
Front brake pad thickness "a" (lining thickness)
Standard: 10 mm (0.39 in.)
Limit: 2 mm (0.08 in.)