Jetta Sedan V6-2.8L (BDF) (2003)
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With engine not running, depress brake pedal firmly several times (to exhaust the vacuum in the unit).
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Now depress brake pedal with average foot pressure, hold and start engine. If the brake booster is working properly, the pedal will be felt
to give slightly under foot (booster assistance becomes effective).
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If faulty, replace complete
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Non-return valve (in vacuum hose)
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Functional check
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Separating from brake pedal
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Removing and installing
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Application
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See Parts supplier
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Brake assistant in brake booster
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Function test
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Application
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See Parts supplier
2. Sealing cap
3. Brake fluid reservoir
4. Sealing plugs
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Coat with brake fluid and install into brake fluid reservoir
5. Retaining pin
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Insert through brake master cylinder
6. Brake master cylinder
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Must not be repaired. If faulty, replace complete.
7. Retaining plate
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Used to secure the wiring harness
8. Self locking nut, 20 Nm
9. Heat shield
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Application
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See Parts supplier
10. Sender 1 for brake booster -G201-
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25 Nm (18 ft. lbs.)
11. Sealing ring
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Always replace
12. Sealing plug
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Connection for vacuum hose
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Insert into brake servo unit
13. Gasket
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For brake booster
14. Self-locking hex nut, 20 Nm (14 ft. lbs.)
Sender 1 for brake booster -G201- and Sensor -2- for brake pressure -G214-, removing and installing
Removing
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Request radio code on vehicles with coded radio, if necessary.
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Disconnect battery.
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Lay out sufficient lint free cloths in area of plenum chamber, engine, and transmission.
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Draw off as much brake fluid as possible from brake fluid reservoir using brake filler and bleeder unit VAS 5234.
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Connect bleeding bottle hose to front left brake caliper bleed screw and open bleeding screw.
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Operate brake pedal at least 15 times so that the brake master cylinder empties.
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Close front left bleeder screw.