Volkswagen Passat 1995 Official Factory Repair Manual page 4264

Work descriptions
a - Pad thickness including backing plate
- Wear limit: 2 mm
With a pad thickness of 2 mm (without backing plate) brake
pads have reached their wear limit and must be replaced
(repair measure).
Rear drum brake pads:
- Check thickness of brake pads through inspection holes in
brake carrier metal sheets - arrow - .
- Wear limit: 2.5 mm (only pad thickness)
Note:
Pay attention to pads smeared with brake fluid or fat.
n
Underbody sealant, checking
When performing visual inspection for damage to
underbody sealant, also check underbody, wheel housings
and sill panels.
Note:
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.ME01.01.5
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12/7/2004