Porsche 911 TURBO - 1989 Workshop Manual page 40

CHECKING THICKNESS OF BRAKE PADS
Cars without Brake Pad
Wear Indicator
2. Visually inspect brake pads for wear.
Brake pads must be replaced when thickness
of 2 mm is reached.
Cars with Brake Pad Wear
Indicator
(since 1984 Models)
The wear limit is reached when the pads have
a remaining thickness of 2 mm.
All brake pads of one axle must be replaced
when the brake pad wear indicator lamp
comes on and, however, not later than after
reaching a thickness of 2 mm. If brake pad
wear is indicated by the lamp, the warning
contact (sensor with lead and plug) must
also be replaced. The warning contact need
not be replaced, if brake pads are replaced
at latest when reaching a thickness of
2.5mm.
Warning contacts with ground cores of
leads must be replaced. Replacements,
however, are not necessary when only the
plastic part of the warning contact is
ground.
1. Remove wheels to check brake pad
thickness.
Checking Brake Pads 46-1
Printed in Germany -V, 1984