BMW Coupes and Sedans 1970-1988 Repair Guide

Window Regulator and Motor

Print

REMOVAL & INSTALLATION



1970-83 Models
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the window glass as outlined in this section.
  4.  
  5. With the glass removed, the regulator assembly can now be removed. This is done by removing the bolts retaining it and pulling it out through the door.
  6.  
  7. The motor can be removed from the regulator assembly by pulling back the protective sleeve, turning the armature until the toothed gear is clear of the motor and removing the mounting screws. Pull the motor from the assembly.
  8.  
  9. Any of the window guide rails, molding or weatherstrip can now be removed. The motor control switch is also easy to remove now. To do this, disconnect the wires from it and pull it out of the door.
  10.  

To install:
  1. Install any parts removed other than the window and motor, and regulator assembly.
  2.  
  3. Install the window regulator and motor assembly, and the lifting arm. Install the window by sliding it into the door.
  4.  
  5. Install the glass into the lifting arm and install the retaining screws.
  6.  
  7. Check the operation of the window and adjust it as necessary, using the following procedure:
    1. Put the window all the way up. Loosen the lifting rail bolts.
    2.  
    3. Using special tool 51 3 150 or equivalent tool, turn the holder for the lifting rail so that both slides on the rail fit snugly. Tighten the rail bolts.
    4.  
    5. Check the window travel, it should be limited by the stop on the motor.
    6.  

  8.  
  9. Install the door panel and check the operation of the window, if manually controlled.
  10.  
  11. Connect the negative battery cable.
  12.  
  13. Check for proper window operation.
  14.  

3 Series Models
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the door panel.
  4.  
  5. Remove the window glass as outlined in this section.
  6.  
  7. Disconnect the wiring harness from the regulator motor.
  8.  
  9. Remove the mounting screws from the door panel.
  10.  
  11. Pull the regulator out of the door cutout.
  12.  
  13. Install in reverse order.
  14.  
  15. Connect the negative battery cable, and check for proper window operation.
  16.  

5, 6 and 7 Series Models
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the door panel.
  4.  
  5. Disconnect the window glass from the regulator and block up to support.
  6.  
  7. Remove the microswitch.
  8.  
  9. Grind out the regulator mounting rivets and remove the screw at the end of the arm.
  10.  
  11. Remove the regulator.
  12.  
  13. Install in reverse order. Replace the rivets with M6x10 bolts with 6.4mm washers and matching nuts.
  14.  
  15. Connect the negative battery cable and check for proper window operation.
  16.  

 
label.common.footer.alt.autozoneLogo