totalimmortality is correct. DEI products are only lifetime guarenteed when they are installed professionally by Authorized dealers. I trust compustar. Im not a big fan of DEI products, but they are amazing though. Compustar pro is sure a heavy price tag, but feature wise and duability, cant go wrong. If you want to waste a key, u can use a 555uw or 555u. I suggest u get a DEI 555hw, which is the correct KEYLESS bypass module to allow remote start. If you want diagrams for ur car, i can easily get them for you. I can also help u get ur alarm installed. as the post above, Its only tricky to get the RF ring around if u use KIB, when using keyless, the wires are tapped into the DATA and SYNCRO wires on the car saving time and the key. As for the factory disarm (EX) there are actaul disarm wires on passenger fusebox (blue) no need to go into door and use keysense.