The crank sensor was replaced and the car was normal for the full day, the next day they tried starting the car and it did not start, they tried several times and then it started. The problem remains and they said the computer isn’t presenting any errors, they said now is that the problem is from the control unit, although I’m not supporting that conclusion, the control unit won’t be failing sometimes, if it is defected it wont start at all, they said I should keep the car at the workshop so they could check all the sensor. Please note the car mileage is 30000km and there was no case of humidity or washing the car. Could you please assist and if it was the control unit they say it would cost me about 2500 dollars. They say the control unit should be ordered through them because it has the chassis number of car!!