Pain in the rear, it's probably not the actual motor but the clips, that crappy plastic that goes brittle over time.....dunno will wait and see,last fix with wire on wifes e46 i did the fix with a piece of wire drilling through the metal backing plate and threading it through and tightening, rock solid.

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N