Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 794

3 - Bulkhead
4 - Hex Nut

❑ 23 Nm
❑ Self-locking
❑ Replace after removing

5 - Brake Master Cylinder

❑ Cannot be serviced. Replace as complete unit if malfunctioning.
❑ Removing and installing. Refer to 

⇒ “3.3 Brake Master Cylinder, Removing and Installing”, page 110

 .

6 - Brake Lamp Switch - F-

❑ Removing and installing. Refer to 

⇒ “3.2 Brake Lamp Switch, Removing and Installing”, page 108

 .

7 - Bolt

❑ 8 Nm

8 - Brake Line

❑ 14 Nm
❑ Brake master cylinder/secondary piston circuit to the ABS Hydraulic Unit - N55-

9 - Brake Line

❑ 14 Nm
❑ Brake master cylinder/primary piston circuit to the ABS Hydraulic Unit - N55-

10 - Sealing Plug

❑ Moisten with brake fluid and press into brake fluid reservoir

11 - Brake Fluid Level Warning Switch - F34-
12 - Brake Fluid Reservoir

❑ Bolt 8 Nm

13 - Vacuum Hose

❑ Vehicles with check valve
❑ Insert into brake booster
❑ On some vehicles with a gasoline engine the Brake Booster Vacuum Sensor - G608- is installed. Refer

to 

⇒ “4.3  Vacuum Sensor G608 , Removing and Installing”, page 122

 .

14 - Cap
15 - Seal

❑ Master brake cylinder/brake booster

16 - Seal

❑ Vacuum hose/brake booster

17 - Brake Booster

❑ Functional check:
– Vehicles with engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in

the unit).

– Depress and hold brake pedal with average foot pressure and start engine. If brake booster is working

properly, pedal will be felt to give noticeably under foot (booster assistance becomes effective).

❑ Replace completely if there are malfunctions (check the vacuum system for the brake booster first; refer

to 

⇒ “4.4 Vacuum System, Checking”, page 123

 )

❑ Removing and installing. Refer to 

⇒ “3.4 Brake Booster, Removing and Installing”, page 113

 .

18 - Seal

❑ Replacing
❑ Attached, only at the factory
❑ Do not replace the gluing on the brake booster and plenum chamber

Tightening Sequence

3.2

Brake Lamp Switch, Removing and In‐

stalling

Removing
Diesel Vehicles
– Unclip the vacuum line from the air guide hose.
– Open the clamps -1 and 2-.
– Remove the air guide hose.

Vehicles with 2.0 L Gasoline Engine
– Open the clamps -2 and 3-.
– Remove the air guide hose -1-.

Continuation for All Vehicles
– Release the connector -1- from the Brake Lamp Switch - F-

and remove.

– Remove the Brake Lamp Switch - F- -2- bolt.
– Remove the Brake Lamp Switch - F- down from the brake

master cylinder and remove it upward from the retaining tab.

Installing
– Install in reverse order of removal.
Tightening Specification
♦ Refer to

⇒ “3.1 Overview - Brake Booster/Brake Master Cylinder”, page

106

♦ Refer to ⇒  Engine Mechanical, Fuel Injection and Glow Plug;

Rep. Gr.  23 ; Air Filter; Overview - Air Filter Housing .

♦ Refer to ⇒  Engine Mechanical, Fuel Injection and Ignition;

Rep. Gr.  24 ; Air Filter; Overview - Air Filter Housing .

3.3

Brake Master Cylinder, Removing and

Installing

Special tools and work‐

shop equipment re‐

quired
♦ Torque Wrench 1331

5-50Nm - VAG1331-

♦ Torque Wrench 1410

- VAG1410-

♦ Brake Charger/

Bleeder Unit -

VAS5234-

♦ Torque Wrench 1331

Insert - Ring Wrench

- 11mm & 17mm -

VAG1331/2-

♦ Engine Bung Set -

VAS6122-

♦ Sealing Tool -

T10249-

♦ Sealing Plugs from

the Repair Kit - 1H0

698 311 A-

Component Location
1 - ABS Hydraulic Unit -

N55- and ABS Control

Module - J104-
2 - Brake Booster
Removing
– If the vehicle has a

coded radio, get the

radio code from the

customer before be‐

ginning.