When it comes to a career in the auto parts industry, there are many different avenues you can choose. Do you consider yourself more of a salesman and people person, or are you more technical / analytical with a preference for the parts and service side? It's great to express a preference, if you have one, but you also want to show the interviewer that you are multi-faceted and able to work in most areas of their business.
"I have always had a strong lean towards sales and service; however, I am also very knowledgeable when it comes to mechanics and parts. I feel that my mechanical knowledge is key to my success in auto part sales. This makes me a very well rounded candidate for you since I can work successfully in most functions."
"I have always had a preference for sales so I do feel that I would prefer to land in a sales driven role. I am very knowledgeable with a variety of parts and would be a valuable member of your auto parts sales team."