i am hearing a noise when i start and turn the car off its coming from the front of the car, its like a knocking noise does anyone know what it can be theres also a little vibration to it aswell its more noticeable when i turn the car off

 

have you done any diagnostic test on the motor mounts?
the front mount often fails after 50kmiles,,, and side mount takes the extra load,,causing its failure

How long does the knocking last? 1 2 3 seconds or longer

might be the ac belt tensioner pulley too,,been a lot of those reported on azine recently