I only had one key so I got one of these mobile locksmiths that carry the same shape. Not a bad equivelant. That was a few years ago. Now I think the battery is a problem in my original key as I am getting the usual signs of doors not opening every now and then. I am going to do the key battery replacement job (also shown on youtube). Unfortunately, I have to do the reset procedure with my aftermarket key as I had some rear bluetooth module work done by a mechanic recently and lost the remote access to both keys. I did the reset job on my genuine key and didn’t get around to the aftermarket spare key.

On another note, I have a genuine key from the same model I had before this one (before it was written off by someone) so maybe I can just get a new metal part copied and do a programme reset with that one. I am sure wreckers have genuine key bodies lying around. The only thing that would prevent this is if there is a specific code and the electronics would not allow a key reset. But I don’t think this would be the case as once you get passed the manual security of opening the car/starting with a copy of the metal part I think the reset procedure should work.

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2005 X5 4.4i M Sport
2003 X5 4.4i