The recent recession forced many Americans to hold on to their old cars for longer, driving the average age of American vehicles on the road up to an amazing 11 years. The auto parts business was booming during that time to keep all those old cars on the road. In this video, Motley Fool analyst Austin Smith tells us why, with all the pent-up demand for new cars in the market today and the economic recovery well under way, auto parts is an area he's staying away from in 2013.