Today I tried to unlock my X5 and the key feels loose and does not lock or unlock the door. I can not find any information on this or if it is a DIY or not. Any help would be greatly appreciated. BTW the car still unlocks and locks with the buttons keylessly but with the key it just moves 180 degrees from the left to the right with no resistance. Thanks so much!!

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'03 X5 3.0 -Stahlgrau-