A book came in the mail the other day from Nissan listing all the accessories I could buy for my new Xterra. Since I work in a questionable area in L.A., getting the air bag atni-theft bolts seemed like a good idea. I went to the parts desk at my local Nissan dealer and after about twenty minutes the bolts were brought out to me along with instuctions on how to install them. They have puzzle lock head like the one on your standard wheel lock. When I asked about the key which was needed to install them, I was told that the key was " a dealer only item, not sold to the general public." So, I asked "how do I put these in without the key?" "They have to be installed by the dealer at a cost of $150 dollars for the two." 150 dollars to install two $10 bolts. Of couse in the accessory book it didn't say intallation extra, or must be installed by dealer. Nissan made it seem that you could purchase the bolts and intall them yourself. If I would have known all this, I would not have even tried to buy them in the first place.