Antilock Brakes / Traction Control Systems: Service and Repair

ABS Control Module and Brake Booster Overview






1 ABS Control Module (J104)

It is not possible to separate the control module and hydraulic unit.

• Removing and installing, refer to => [ Control Module and Hydraulic Unit ] Service and Repair

2 ABS Hydraulic Unit (N55)

It is not possible to separate the control module and hydraulic unit.

• Removing and installing, refer to => [ Control Module and Hydraulic Unit ] Service and Repair

3 Brake Line

• To the right front brake caliper

• Identification: 5.25 mm diameter and tube fitting with M10 x 1 thread

• Marked on hydraulic unit with "VR"

4 Brake Line

• To left rear brake caliper

• Identification: 5.25 mm diameter and tube fitting with shorter thread M12 x 1

• Marked on hydraulic unit with "HL"

5 Brake Line

• To the right rear brake caliper

• Identification: 5.25 mm diameter and tube fitting with M10 x 1 thread

• Marked on hydraulic unit with "HR"

6 Brake Line

• To left front brake caliper

• Identification: 5.25 mm diameter and tube fitting with shorter thread M12 x 1

• Marked on hydraulic unit with "VL"

7 Brake Line

• Master brake cylinder/primary piston circuit to hydraulic control unit

• Identification: 8.5 mm or 6 mm and tube fitting with longer thread M12 x 1

• Marked on hydraulic unit with "HZ1"

8 Brake Line

• Master brake cylinder/secondary piston circuit to hydraulic unit

• Identification: 8.5 mm or 6 mm and tube fitting with longer thread M12 x 1

• Marked on hydraulic unit with "HZ2"

9 Heat Shield

10 Inner TORX(R) Bolt

• 12 Nm

11 Brake Booster

• On vehicles with a hydraulic brake booster, a vacuum sensor is installed, refer to => [ Brake Booster Vacuum Sensor (G483) ] Brake Booster Vacuum Sensor (G483)

• Removing and installing, refer to => [ Brake Booster ] Brake Booster

12 Bracket

13 Nut

• 20 Nm

14 Rubber Insulation

15 Inner TORX(R) Bolt

• 10 Nm

16 Bracket