Volkswagen Golf / Golf GTI / Jetta. Manual — part 405

45-12

- Remove as much brake fluid as possible from

brake fluid reservoir using a brake bleeder
bottle.

- Insert brake pedal depressor VAG 1869/2 or

equivalent.

- Activate brake pedal booster with brake pedal

depressor.

- Connect bleeder bottle hose to bleed screw of

left front brake caliper and open bleed screw.

- Close left front bleed screw.

Note:

Do not let brake fluid enter electrical connectors.

- Release ABS control module connector (arrow

1-) and remove (arrow -2-).

- Place plastic covering under control module and

hydraulic unit. Do not use rags.

Hydraulic unit, brake booster/master cylinder, overview

45-13

- Disconnect brake lines from

hydraulic unit to brake master
cylinder (arrows) and suspend
with wire.

- Disconnect remaining brake lines

from hydraulic unit.

- Seal brake lines and threaded

holes (arrows) using plugs from
repair kit, Part No. 1H0 698 311
A.

- Remove bolts from bracket for

hydraulic unit (arrows).

- Remove hydraulic unit with

control module.

Hydraulic unit, brake booster/master cylinder, overview

45-14

ABS control module, removing from
hydraulic unit

- Disconnect electrical connector for hydraulic

pump motor from control module.

Note:

- Remove bolts (arrows) from control module and

remove control module.

When removing the control module make sure

that the hydraulic unit valve dome does not
contact the control module solenoid valves.

Cover the control module magnet coils with a

plastic cover. Do not use rags.

After separating the control module and

hydraulic unit use transportation protection for
the valve dome.

Hydraulic unit, brake booster/master cylinder, overview

45-15

Installing

Note:

Only remove the sealing plugs on the new

hydraulic unit just before installing the
corresponding brake line.

If the sealing plugs are removed from the

hydraulic unit too early, brake fluid can escape.
It can then no longer be guaranteed that the
unit is sufficiently filled or adequately bled.

When assembling the control module and

hydraulic unit, be sure that the hydraulic unit
valve dome does not come in contact with the
control module solenoid valves.

- Using new bolts, install control module to

hydraulic unit. Do not tighten more than max. 4
Nm (35 in. lb).

- Re-connect electrical connector for hydraulic

pump motor.

- Install ABS unit to bracket.

Note:

Hand-tighten bolts at first to make attaching the

individual brake lines easier.

- After tightening brake lines, tighten hydraulic

unit.

- Continue installation in reverse order of

removal.

Hydraulic unit, brake booster/master cylinder, overview