47-41
 
  
Brake master cylinder with 25.4 
mm (0.999 in.) diameter piston 
and brake servo, component 
summary Note: 
 
Brake master cylinders can no longer be 
disassembled, i.e. there is no provision for 
servicing. 
 Use only fresh brake fluid. Pay attention to 
information on the brake fluid reservoir. 
 Brake line connections to master cylinder, 
Bosch 5.0 ABS system (   page 45
-6 ), Bosch 
5.3 system (   page 45
-18
 ). 
1 - 
Brake master cylinder 
Diameter: 25.4 mm (0.999 in.)Cannot be repaired. If malfunctioning, 
replace as complete unit only. Must be removed and installed together 
with the brake servo Removing and installing   page 47
-46
2 - 
T45 Torx 
25 Nm (18 ft lb)
Pa
ge 1 of 11 Brake master c
ylinder with 25.4 mm 
(0.999 in.
) diameter 
piston and brake servo, com
ponent summar
y
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.SU03.47.7