Originally Posted by dkl

All X5's use the same 19mm bolt. I got my set from the dealer almost 7 years ago for around $40. I also agree with others that the OEM key sets are somewhat limited and isn't as secure as some of the aftermarket ones. I recently bought a set of McGard for my MCoupe and they are much better than the OEM set on my X5.

You can get a set on amazon for approx. $78 => Amazon.com: BMW Genuine Wheel Locks for All X5: Automotive: Reviews, Prices & more

Or you can get the McGard for approx. half price for $32.5 => Amazon.com: McGard 27205 Chrome Bolt Style Cone Seat Wheel Locks (M14 x 1.5) - Set of 4: Automotive Not sure why a black set isn't available for the X5, which it is usually available.