ABS Bosch 8.0

The following versions are possible with Bosch 8.0 ABS:

ABS/EDL/ASR/ESP

The ABS brake system is divided diagonally. The brake booster assist is provided pneumatically by the vacuum brake booster unit.

Malfunctions in the ABS system do not influence the brake system and booster. The conventional braking system remains functional even without ABS. A change in braking behavior must be looked at. After the ABS warning lamp comes on, the rear wheels can lock early when braking!

Malfunction sources are reduced by direct connection of components named. Hydraulic control module is serviced by replacing it.

Fig 1: Identifying Control Module Bosch 8.0 ABS/EDL/ASR/ESP

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Bosch 8.0 ABS/EDL/ASR/ESP:

Removing and installing control module and hydraulic unit

→ Hydraulic control unit, removing and installing

Hydraulic unit and brake lines

Fig 2: Exploded View Of Hydraulic Unit And Brake Lines

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Brake master cylinder and brake booster

2 - Brake line

Brake master cylinder/primary piston circuit to hydraulic unit

3 - Brake line

Brake master cylinder/secondary piston circuit to hydraulic unit

4 - Brake line

Hydraulic unit to right front brake caliper

5 - Brake line

Hydraulic unit to left rear brake caliper

6 - Brake line

Hydraulic unit to right rear brake caliper

7 - Brake line

Hydraulic unit to left front brake caliper

8 - ABS hydraulic unit N55 with ABS control module J104

With integrated brake pressure sensor
Removing and installing → Hydraulic control unit, removing and installing

9 - Spacer (2 x)

10 - Longitudinal member (body)

11 - Combi nut, 10 Nm

12 - ESP bracket

13 - Bolt with bonded rubber bushing, tightening torque 10 Nm

Cannot be removed from component

14 - Combi nut, 8 Nm

15 - Washer