drivers door lock problem on 2001 BMW 325i

when i put my key in the drivers door, it just turns right to left but doesnt unlock the door. what could this be?

Asked by for the 2001 BMW 325i
The door interior trim panel needs to be removed to inspect what is wrong but it is probably just a linkage clip that has failed. The plastic clip may be only a few dollars but the labor is in removing the interior trim panel.
Why, at times, only the driver side and trunk open in my bmw 325i-2001? All other doors remain locked and unable to open from inside or outside.

Go to the web site below:
The GM5 module causes this problem. Vehicles that use the GM5:1) E46 - 3-series between 1998 and 2005, 2) E85 - Z4 between 2002 and 2008 and 3) the E52 - Z8 all years. He repairs for a fraction of the cost ($90.00) of new module+labor ($700.00). I got mine repaired there.
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