Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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1 - Tandem brake servo
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On gasoline engines the vacuum required is taken from the intake manifold.
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From model year 2001, vehicles with a gasoline engine and automatic transmission are equipped with a brake vacuum pump, Refer to Vacuum
Pump, Brakes, Service and Repair
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On Diesel engines an exhauster is installed to create the required vacuum.
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Function check
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With engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in the module).
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Depress brake pedal with average foot pressure, hold and start engine. If the servo module is working properly, the pedal will drop slightly
(servo assistance becomes effective).
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If faulty replace.
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Removing and installing, Refer to Vacuum Brake Booster, Service and Repair
2 - Brake line connection
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To left-rear caliper
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Marked on hydraulic unit with -HL-
3 - Brake line connection
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To right-rear Caliper
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Marked on hydraulic unit with -HR-
4 - Brake line
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Master brake cylinder/secondary piston circuit to hydraulic unit
5 - Brake line
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Brake master cylinder/primary piston circuit to hydraulic unit
6 - Brake line
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To left-front brake caliper
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Marked on hydraulic unit with -VL-
7 - Hex nut, 12 Nm
8 - Threaded stud
9 - Rubber damper
10 -ABS hydraulic unit
11 - Brake line
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To right-front brake caliper
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Marked on hydraulic unit with -VR
12- Retainer
13 - Hex bolt, 9 Nm
14 - Retainer
