I purchased the following on Amazon last August and it works much better than the e53 aftermarket, cost about $20.00

Rear Wiper Arm Blade - for X5 X5M E70 2007-2013 - MIKKUPPA Back Windshield Wiper Assembly Replacement - All Season Natural Rubber Cleaning Window

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Rich Wilson
2006 X5 3.0 6Speed
Build Date 10/12/2005