207 left rear door lock

The friends started not to open the door from the outside in the past months, they said it might have been an engine in the industry, but it was not from it, it was caused by a small white gear inside the lock, but we couldn't find that piece, the complete lock will change. Lock price is 550TL. The situation has become even more serious now, even if I lock the car, the left rear door does not lock, and when I open that door, it unlocks the entire center. Do you have any locks, etc. that can help you?

so it was in the right rear door, I went to an auto electrician, my friend cleaned the socket or something, he did something, I did not change anything, I think, go to another place and ask

Let's reach out to the girl on 0531 363 67 66 and see if there is a problem.

Mine is not electrical but more mechanical.