RRToadHall· RIP Our Friend
The story has not changed. You must order from the dealer as the key is preprogrammed when delivered.
Or if you have the SM035 Faultmate module and the old BECM that the keys come from you can read the 3x 3 digit fob codes out of the old module and program them into another BECM to get the keys to work. I have a few sets of fobs from vehicles that have been scrapped, which I've kept record of the fob codes for, just in case someone wants a set of keys, then the remotes can be programmed.It is possible to use secondhand key fobs as long as the Lockset Bar Code of the donor vehicle is known. If it is not known, a main dealer should be able to find it out from the VIN No. but may require proof of ownership - difficult if the keys are bought on fleabay. Also assuming the locks have not previously been changed and the key is the correct frequency for the country.
Once the 14 digit Lockset Bar Code is known, the 9 digit key Fob Code can be found. The Blackbox Systems Faultmate forum can supply it. The new Fob Code can then be entered and saved in the BECM to allow synchronisation.
A mixture of keys from different cars obviously cannot be used.
so as you say,all i would be buying is a spare back up key in case i lose my original,suppose it is better than nothing thanks for the replythe issue of keys 1 2 3 or 4 - when i ordered a 2nd key for my 2nd RR Stratstone Doncaster showed me the parts listing on their dealer pc = numbers 3 and 4 were no longer listed, (they were all listed back in 2012 when i had to replace a broken unit on my previous RR) said i wanted no,2 and when they entered the part number it automatically listed part number for key 1 which i verified with them so whilst i now have 2 keys if i want to use it i have resync the key to the car - disabling the other key so no preset seat positions for me and the wife/ just an expensive spare. if the us dealers can still supply other numbered keys it may warrant a call to JLR UK asking why.....
Is there any way of knowing what key I already have? I've only got one for the ex-plod and the label was scraped off years ago so it could be any of them. I've got the lockset barcode on the printout that I got from LR when I needed to find out the EKA code although I doubt that is going to be much use to me. I'm actually not sure what I'd do with a spare key. Unless I lost my key then I wouldn't need it. If I left it in the house then I'd be stuffed if I lost it while I'm 1,000 miles away from home so ideally I'd need to find somewhere I could leave it with the car where I could get to it if I ever needed it.
Other than that, I don't know of any other way of telling. I've been thinking about trying to read the data stream from the RF receiver to the BECM and then do it with both keys (when my other one finally arrives) and see if it's possible to identify what tells the BECM its key ID.