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It maybe there to help identify the part if there is various models with diffrent parts??? I say this cos' mini's have the same sort of thing on the master cylinder for the brakes to identify quickly what part it is. Someone tell me if im talking B******.
For heaven's sake man!!!!!!!!!
Now the secret is out!!!!
That's the rubber band that winds up when you operate the starter, then unwinds to power the car for the rest of the day!!!