Ford Territory Door Lock Actuator Cog Gear

Symptoms of faulty actuator Cog gear in 2004 - 2007 Ford Territory are: 

This is where Ford got it wrong in the powerful 190kw (255 horsepower) territory :

1. Doors can't  lock

2. If central lock is engaged, all doors seem to lock except the faulty one.

3. When you pull the handle of the faulty door from outside, all five doors unlocks itself even

     though the central lock was engaged.

4. In most cases, the door with the faulty actuator Cog gear will cease to open at all. 

5. You kept wishing that no criminal finds out that one unlocked door opens all doors.