Volkswagen Passat 2011 Workshop Manual page 87

1 - Pedal cluster
2 - Self-locking hexagon nut,
25 Nm
❑ Renew after removing
3 - Seal
❑ For brake servo.
4 - Brake servo
❑ On petrol engines, the
required vacuum is tak‐
en either from the intake
manifold or generated
by a mechanical vac‐
uum pump.
❑ Vehicles with an FSI en‐
gine but no HBS are fit‐
ted with a pressure sen‐
sor ⇒ page 122 .
❑ A vacuum sender is fit‐
ted in vehicles with HBS
⇒ page 33 .
❑ Some vehicles with a
petrol engine and a dual
clutch gearbox, which
are not equipped with an
HBS (hydraulic brake
servo), have an electric
vacuum pump
⇒ page 121 .
❑ Diesel engines are fitted
with a vacuum pump to
generate the necessary
vacuum pressure
⇒ page 120 .
❑ Functional check:
– With engine switched
off, depress brake pedal firmly several times (to exhaust vacuum in unit).
– Now step on and hold brake pedal with medium pressure and start engine. If the brake servo is functioning
properly, the brake pedal will be felt to go down as the servo takes effect.
❑ Replace completely in the event of a fault (before doing so, check brake servo vacuum system)
⇒ page 122
❑ Removing and installing
5 - Sealing ring
6 - Brake servo vacuum sender - G483-
❑ Only on vehicles having HBS
❑ Removing and installing
7 - Brake master cylinder
❑ Cannot be repaired. If faulty, renew as a complete unit.
❑ Removing and installing
8 - Brake light switch - F-
❑ Removing and installing
9 - Torx socket head bolt, 5 Nm
10 - Heat shield
11 - Self-locking hexagon nut, 25 Nm
❑ Renew after removing
⇒ page 102 .
⇒ page 33 .
⇒ page 88 .
⇒ page 86 .
Passat 2011 ➤ , Passat Variant 2011 ➤
Brake systems - Edition 02.2014
3. Brake servo and brake master cylinder
83