how do i make a mesh stop moving

ps: in the start i actually wanted to make a car with the default physics, since that was easier and worked better. i used this tutorial here https://youtu.be/_ZBQg7293v0?si=wKWi92VpUcXvav-J but for some reason after rigging the car my wheels fall off and lay flat on the floor. plus when i set the vehicle component and try to make the car go forward it doesnt work. if you have a solution i would love that. i have also made a post for this issue (this post here the wheels of my car arent attached to the car )