BMW X3 2005

Steering Knuckle

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Remove front wheel.
  6.  
  7. Remove or disconnect the following:

    The stabilizer link from the spring strut. Use a fixed wrench as a counterhold
     
    The ABS sensor. Hang up the sensor using a piece of wire
     
    The ABS sensor cable from the spring strut
     
    The brake caliper mounting bolts. Hang the caliper up using a piece of wire
     
    The halfshaft bolt. Use a screwdriver as a counterhold on the brake disc
     
    The brake disc. Detach the end of the halfshaft in the hub by knocking the drive shaft into the hub approximately 1 / 3 - 1 / 2 inch (10-15mm). Use a rubber or copper mallet
     
    The tie rod ends from the steering arm
     

  8.  
  9. Measure the position of the steering knuckle and spring strut for installation purposes.
  10.  
  11. Support steering knuckle (1) with workshop jack and a suitable mounting.
  12.  
  13. Remove the bolts (2) retaining the spring strut and the steering knuckle.
  14.  
  15. Expand steering knuckle (1) with special tool 31 2 230.
  16.  
  17. Lower workshop jack.

    Click image to see an enlarged view

    Fig. Steering knuckle (1) and bolts (2) with expander tool 31 2 230 installed for removal

  18.  
  19. Suspend the drive shaft from a hook.
    NOTE
    Take care not to damage the halfshaft boot.

  20.  
  21. Disconnect the ball joint pinion from the control arm. Refer to Lower Ball Joint removal and installation.
  22.  
  23. Remove steering knuckle.
  24.  

To install:

  1. Install the steering knuckle in approximately the same position from which it was removed.
  2.  
  3. Install a new nut on the ball joint. Tighten to 59 ft. lbs. (80 Nm).
    NOTE
    Make sure that the mating surfaces on the ball joint and link are clean.

  4.  
  5. Clean the splines on the halfshaft.
  6.  
  7. Turn the steering knuckle and bring the halfshaft into the hub.
  8.  
  9. Install halfshaft bolt and finger-tighten. Lubricate the bolt.
  10.  
  11. Install bolts retaining the spring strut in the steering knuckle. Use new bolts and nuts. Tighten to 74 ft. lbs. (100 Nm).
  12.  
  13. Install or connect the following:
    NOTE
    Ensure that the sensor seat in the steering knuckle is absolutely clean. Clean the ABS sensor with a soft brush.


    NOTE
    Ensure that the brake disc and wheel rim hub mating surfaces are clean.



    The stabilizer link to the spring strut. Use a new nut. Counterhold using a wrench so that the boot is not damaged. Tighten to 48 ft. lbs. (65 Nm)
     
    The ABS sensor cable
     
    The ABS sensor onto the steering knuckle. Tighten the ABS sensor to 82 inch lbs. (8 Nm)
     



    The tie rod end onto the steering knuckle. Use a new nut. Tighten to 59 ft. lbs. (80 Nm)
     
    The brake disc.
     

  14.  
  15. Install new halfshaft nut. Tighten to 310 ft. lbs. (420 Nm). Crimp nut to axle.
  16.  
  17. Install the brake caliper. Use new bolts
  18.  
  19. Install the wheel. Tighten to 103 ft. lbs. (140 Nm).

    Click image to see an enlarged view

    Fig. Crimping halfshaft nut to axle during installation

  20.  

 
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