Yeah, when the window regulator fails, you definitely know it. Mine went at 80mph on I70. Sounded like someone shot out my window. Scared the crap out of me(almost)! It really screws up the aerodynamics. Had to slow way down to keep the noise level bearable.

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Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
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Life is not fair!
You can't protect people from their own stupidity!
Laughter makes life worth living