Wheel alignment. How to tell if your car needs an alignment, DIY with Scotty Kilmer. How to do an alignment. Car alignment explained and why you shouldn't do a wheel alignment yourself. Bad alignment and uneven tire wear symptoms. Proper alignment requires expensive computerized equipment that most people don't have, so trying a DIY wheel alignment often doesn't end well. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years.