307 1.6 starter problem

Sa friends Sometimes there is a shortage of starter in the vehicle, so sometimes it is persistent, no starter does not work, a little research, they said the starter automaton price is 450 lira. Or is it a direct replacement as they say? Also, could there be another problem other than the starter solenoid? Does it react like this when coal decreases or runs out? Thanks in advance Note the vehicle has electricity, the battery is new voltage is sufficient It does not respond at all as if the starter motor is not receiving electricity.

There are 2 stylish crank sensor socket and starter motor how much is the price of the new one