i got my titan a couple of months ago and the xm sat radio antenna is near the 3rd brake light. the wire from the antenna is routed UNDER the 3rd brake light gasket. it appears that it has been leaking from that point before i got it and i just found it a couple of weeks ago. there was a nice groove formed into the gasket from the wire. piss poor design. the dealer service manager said they had never seen the antenna located there, it's usually up front.