Just a tip I learned. My '99 never had the factory changer. I purchased an Alpine unit including the bracket from another Prime member. Went to install it one weekend and I discovered that something was still missing. Turns out that if your car never had the factory changer, the brackets behind the trunk lining will be missing. I had to order a complete installation kit from Acura to get the additional parts that I needed. I'm not sure yet but, I may have some extra parts to sell once I get done with the installation.