Power Door Mirror lost preset position!!!
 

Hi to all,
My 2004 Voyager, as we call them in scotland, aka Town & County, has lost thepresetposition for the LHS motorised door miror.
When the mirror is folding out, it passes the normal stop and carries on another 20-30 degrees.
Will I need to replace the whole mirror assy.?
I was wondering if it is possible to change motor that folds the mirror,and the availability of this motor ?

:)