Car is not moving Straight with Acceleration Button Pressed

hi everyone. I am facing this problem. When I press acceleration button my car moves and slightly turns anti clockwise. And with reverse gear it slightly rotates to clockwise angle. Anybody knows the solution please help me.
P.S Wheel Alignment is fine. and Also I have adjusted the RigidBody.CenterOfMass

if you are using wheel colider for your task ,then check if the collider pos. is in 0,0,0 as well as if object(wheel ) may contain the pos. of 0,0,0

and are you releasing the brake torque after you release the brakes?