It isn't a bad idea to start with your LBS. Assuming they sell bike racks, they will have information on which one will work with different car models. I do not know what the general practice is, but my LBS installed my bike rack at no charge and showed me how to remove/replace it. My rack was far from inexpensive but has been a true blessing to have! There is a pretty wide range of prices for racks, so it all just depends on what you want/need.