A vision system of a vehicle includes a camera having a front housing portion and a circuit element having an imager disposed thereat. One of the front housing portion and the circuit element includes a protrusion protruding therefrom and the other of the front housing portion and the circuit element includes a receiving portion for at least partially receiving the protrusion when the circuit element is positioned at the front housing portion to align the imager with the lens. When the circuit element is positioned at the front housing portion to align the imager with the lens, the protrusion is at least partially received at the receiving portion and is attached thereat, and no other part of the lens holder is attached at the circuit element when the circuit element is positioned at the front housing portion to align the imager with the lens.