BMW Repair Questions? Ask a Mechanic for Answers ASAP
a single click tends to point to a failed starter motor.
it is possible that you simply have a flat battery so you should try a jump start if you have not
if you still only get a single click when you try to start, that points to the starter as having failed, which will unfortunately require it be replaced.
Sorry if you were hoping for a different answer, please don't shoot the messenger - I can only give the honest answer, which I have. Please remember that a low rating PUNISHES me for my honest and prompt response, and I receive nothing for my time and answer until a positive rating is clicked.Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.