What should I pay to have my Mazda CX9 2011 inspected and taillight replaced?

Late answer, but to answer your question... How bad is your crack? Is water leaking through? There are plastic fillers out there that might be worth a try if it is just a hairline crack. Other than that, a replacement is in order. My suggesting to you, if you have not done so already, fine one on Ebay or a Mazda OEM website (google it). Dealers will charge extra. Just make sure it is OEM (to get matching and quality LED lights) Install is easy!