My daughter and her friends managed to drop a key in the water while swimming and then drove over it with the other SeaDoo. The floatie and lanyard were captured nicely wrapped around the drive shaft, but the chip part of the key was gone.
We purchased a replacement key and a spare and the dealer we purchased from was nice enough to program both machines to accept all the keys, no charge. Of course it required loading them both up on the trailer to bring to the dealer.