My window sticker includes: "Vehicle Security System w/Remote Keyless Entry." The manual discusses this and then describes "Nissan Vehicle Immobilizer System (if so equipped)". It talks about registered keys. Are these the keys that are referred to on the forum as transponder keys? How do I know if I have the Immobilizer System since it is not listed on the sticker? If I do, it means a savings to me on my insurance; basic alarm does not give as big a discount. Also, the manual talks about "interference from another registered key, an automatied toll road device or automatic payment device on the key ring", and how to restart if you encounter such a problem. I have a Speed Pass wand on my key chain (for Exxon/Mobil stations) and wondered if this would potentially cause a problem. I received three keys w/ my X: two with the silver Nissan logo, one solid black. The salesman said the black key was a valet key and would only unlock and start the car, not unlock liftgate or glove box. He didn't mention anything about transponder keys or unprogrammed keys. Can someone shine a light on this for me? I have to go to the stealership today anyway (since they stole my Retractable Cargo Cover as stated on my sticker) and figured I might educate them on some points they might not have covered when I got my vehicle check out talk.