BMW questions? Ask a BMW repair Expert for answers.
There are really any number of things this could be. Bearing, suspension part, rock or nail in the tire, debris stuck behind the wheel.
There is no simple answer here unfortunately. I suggest you start by inspecting the tires for any stuck objects (roll the car a foot, inspect, roll another foot, inspect, etc). If you can't see anything obvious you can jack up that corner and remove the wheel to have a closer look. If you still can't identify anything, you will need to have the car put on a hoist for a proper inspection, or have it driven by an experienced BMW technician.
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It is somewhat difficult to diagnose a "clicking noise" without hearing/experiencing it first hand. This is the best advice that can be given remotely, I'm afraid. Check the tire, it is common to get a nail or rock stuck in them.
Okay, it very well may be, There is no way to know for sure without having them inspected.