Wheel Bearing Housing and Hub Overview

Wheel Bearing Housing and Hub Overview






1 Strut

2 Bolt

• The bolt point must face in the 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 the wheel speed sensor, clean the inner surface of the bore and coat with lubricating paste (G 000 650).

4 Bolt

• M6 x 16

• 8 Nm

5 Tie Rod End

6 Wheel Hub with Bearing

• The sensor ring for the Anti-lock Brake System (ABS) is installed on the wheel hub.

• There are different versions.

• Allocation, refer to the Parts Catalog.

7 Nut

• M12 x 1.5

• Tighten to 100 Nm, then loosen 180° (1/2) turn, and tighten again to 100 Nm.

• Self-locking

• Always replace if removed.

8 Brake Rotor

9 Bolt

• There are different versions.

• There are 2 types of twelve point bolts, with and without ribs.

• When installing a twelve-point bolt, always check what type of 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 + an additional 90° (1/4) turn. For loosening and tightening specifications, refer to => [ Drive Axle Bolt Loosening and Tightening, Twelve Point Bolt with Ribs ] Drive Axle Bolt Loosening and Tightening, Twelve Point Bolt with Ribs.

• The tightening specification for a twelve-point bolt without ribs is 200 Nm + an additional 180° (1/2) turn. For loosening and tightening specifications, refer to => [ Drive Axle Bolt Loosening and Tightening, Twelve Point Bolt with Ribs ] Drive Axle Bolt Loosening and Tightening, Twelve Point Bolt with Ribs.

• Always replace if removed.

10 Bolt

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 a bolted on brake carrier.

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

14 Bolt

• M12 x 1.5 x 45

• 70 Nm + an additional 90° (1/4) turn.

• Always replace if removed.

15 Drive Axle

• Removing and installing, refer to one of the following:

=> [ Drive Axle, with CV Joint ] Drive Axle, with CV Joint.

=> [ Drive Axle, Triple Roller Joint AAR3300i, Bolted to Flange Shaft ] Drive Axle, Triple Roller Joint AAR3300i, Bolted to Flange Shaft.

=> [ Drive Axle, Triple Roller Joint AAR2600i and AAR3300i, Mounted in Transmission ] Drive Axle, Triple Roller Joint AAR2600i and AAR3300i, Mounted in Transmission.

=> [ Drive Axle, Triple Roller Joint AAR3300i, Mounted on Stub Shaft ] Drive Axle, Triple Roller Joint AAR3300i, Mounted on Stub Shaft.

16 Nut

• M12 x 1.5 x 80

• 70 Nm + an additional 90° (1/4) turn.

• Self-locking.

• Always replace if removed.

Differences Between a Twelve Point Bolt With Ribs and Without Ribs





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

I Twelve point bolt with ribs - arrow A -
II Twelve point bolt without ribs - arrow B -