Q: Car door only opens from inside

The interior and exterior door handles have their own separate linkages to the door latch. One possible cause is the connection from the exterior door handle to the latch. If the linkage is loose, out of adjustment, or broken, the door latch mechanism may be faulty. Another cause can be the exterior door handle. The linkage or cable from the door handle can also be broken or out of adjustment. With most vehicles, inspection and/or replacement can involve removal of the entire interior door panel for access. Have a certified technician look into why the door will not open from the exterior to find and replace the exact cause.