BMW Coupes and Sedans 1970-1988 Repair Guide

Door Locks

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REMOVAL & INSTALLATION



The procedure for door lock removal and installation is the same for both power and manual locks with the exception of the lock actuating switch and wiring on power lock systems.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the front door panel.
  4.  
  5. Wind the window all the way up. Pull the window guide out at the bottom. This can be reached through the bottom opening in the door panel.
  6.  
  7. Remove the bolt retaining the lower part of the window guide rail and take the guide rail out by pulling down.
  8.  

Removing the guide rail will not cause the window to fall.

  1. Locate the lock assembly bracket. On power lock equipped models this will also hold the lock actuator and wiring.
  2.  
  3. Loosen the retaining screw and remove the bracket, then disconnect the actuator wire (if equipped with power locks).
  4.  
  5. Disconnect the lock rod from the lock assembly. This is the part of the lock that actually keeps the door closed.
  6.  
  7. Any of the other locking components can now be removed as necessary. This includes the inside release handle, the locking mechanism linkages and the key lock assembly on front doors. The key lock is removed by twisting it 90 degrees and pulling it out to the inside of the door.
  8.  

To install:
  1. Install any removed components then install the lock assembly bracket.
  2.  
  3. On models with power door locks, reconnect the wiring to the actuator.
  4.  
  5. Check all lock rods for binding or bent linkages. It is also a good idea to check the locking mechanism for proper operation before reinstalling the door panel.
  6.  
  7. After all components are in place and you are sure the locking system is working, reinstall the lower window rail and then install the door panel.
  8.  

When installing the door panel the plastic sheeting MUST be reinstalled as this is a water barrier. If the sheeting is damaged, use a piece of heavy plastic to replace it.

  1. Reconnect the negative battery cable and recheck the operation of the door locks.
  2.  
  3. On models with power door locks, be sure the entire locking system is working.
  4.  

 
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