Front Steering Knuckle: Service and Repair

Wheel Bearing Housing and Wheel Bearing Unit Overview






1 Suspension Strut

2 Tie Rod End

3 Bolt

• 70 Nm + 90° turn

• Always replace if removed.

• Bolt point must face in direction of travel.

4 Bolt

• 8 Nm

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

• Before inserting sensor, clean inner surface of fitting hole and coat with grease G 000 650

6 Cover Plate

7 Nut

• 20 Nm + 90° turn

• Always replace if removed.

8 Bolt

• 10 Nm

9 Brake Rotor

10 Bolt

• Always replace if removed.

• Different versions, allocation, refer to the Parts Catalog

• Twelve-point bolt characteristics

• Hex bolt = 200 Nm + 180° additional turn => [ Hex Bolt between Drive Axle and Wheel Hub, Loosening and Tightening ] Hex Bolt Between Drive Axle and Wheel Hub, Loosening and Tightening.

• Twelve-point bolt with ribs = 70 Nm +90° additional turn, refer to => [ Twelve-Point Bolt with Ribs, Loosening and Tightening, Drive Axle to Wheel Hub ] Twelve-Point Bolt With Ribs, Loosening and Tightening, Drive Axle to Wheel Hub.

• Twelve-point bolt without ribs = 200 Nm +180° additional turn, refer to => [ Twelve-Point Bolt without Ribs, Loosening and Tightening, Drive Axle to Wheel Hub ] Twelve-Point Bolt Without Ribs, Loosening and Tightening, Drive Axle to Wheel Hub

• Before installing, clean the threads in the CV joint with a tap.

11 Bolt

• 4 Nm

12 Wheel Hub with Wheel Bearing

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

• Sensor ring for ABS is installed in wheel hub

• There are different versions.

• Allocation, refer to the Parts Catalog

13 Wheel Bearing Housing

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

• Allocation, refer to the Parts Catalog

14 Bolt

• 70 Nm + 90° turn

• Always replace if removed.

15 Drive Axle

16 Nut

• Always replace if removed.

Characteristics between a twelve-point bolt with ribs and a twelve-point bolt without ribs.






The contact surface - 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 -