Wheel Bearing Overview

Wheel Bearing Overview






1 Suspension Strut

2 Internal Multi-Point Bolt

• Bolt point must face in direction of travel.

• Always replace if removed.

3 Left Front ABS Wheel Speed Sensor (G47) / Right Front ABS Wheel Speed Sensor (G45)

• Can be checked in Guided Fault Finding using the Vehicle diagnostic tester

• Before inserting wheel speed sensor, clean inner surface of bore hole and coat with securing grease (G 000 650)

4 Hex Socket Head Bolt

• 8 Nm

• M6 x 16

5 Tie Rod End

6 Wheel Hub with Wheel Bearing

• Sensor ring for ABS is installed in wheel hub

• There are different versions.

• Allocation, refer to the Parts Catalog

7 Nut

• M12 x 1.5

• 50 Nm

• Self-locking

• Always replace if removed.

8 Internally Vented Brake Rotor

9 Bolt

• There are different versions.

• Allocation, refer to the Parts Catalog

• There are 2 types of twelve-point bolts, with and without ribs. Distinguishing characteristic => [ Differences between a twelve-point bolt with ribs and a twelve-point bolt without ribs ]

• When installing a twelve-point bolt, always check what type of twelve-point bolt is to be used.

• Use the correct tightening specification for the specific bolt.

• The tightening specification for a twelve-point bolt with ribs is 70 Nm + 90°. For loosening and tightening specifications, refer to => [ Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection.

• The tightening specification for a twelve-point bolt without ribs is 200 Nm + 180°. For loosening and tightening specifications, refer to => [ Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection.

• Always replace if removed.

10 Bolt

• Tightening specification => Brake system 46 Front wheel brakes, servicing.

11 Bolt

• M6 x 12

• 12 Nm

12 Cover Plate

13 Wheel Bearing Housing

• Removing and installing, refer to => [ Wheel Bearing Housing ] Wheel Bearing Housing

• with bolted brake carrier

• If a wheel bearing housing is replaced, vehicle must then be aligned => [ Vehicle Alignment Procedure ] Vehicle Alignment Procedure.

14 Internal Multi-Point Bolt

• 70 Nm + 90°

• M12 x 1.5 x 45

• Always replace if removed.

15 Driveshaft

16 Nut

• 70 Nm + 90°

• M12 x 1.5 x 80

• Self-locking

• Always replace if removed.

Differences between a twelve-point bolt with ribs and a twelve-point bolt without ribs





The contact surfaces - arrow A - and - arrow B - are different on the two-point bolts.

I Twelve-Point Bolt with Ribs - arrow A -
II Twelve-Point Bolt without Ribs - arrow B -