Hey TbirdTony: Thanks for the input. I had a couple of really experienced XF owners listen to my pathetic siren on the weekend and they told me not to waste my time on the battery replacement deal and just order a siren. So now all of you Americans can feel sorry for us Canadians, that $140 amazon siren converts to $250 Canadian by the time it ships. For fun I had my local Chrysler dealer give me a local dealer price, $579. Ours is fully insured too but like to keep the car in 100% working order. I'll report on what I find once I get the new one in and installed and take the old one apart.