Had the same proBlem 2 days ago. New key from dealer 170 - so I cut opened the old key, put a new 2025 battery from RadioShack, come crazy glue and  my remote works again.
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2009 BMW X5 E70 - Sport
SOLD - 2003 X5 4.4 Sport Grey-Green Metallic
Mods:
20” Style 87 Wheels, Running Boards,
Integrated OEM BMW Navi, Intravee
DEPO Headlights with LED AE, DEPO LED rear lights
CAI, DINAN Strut Bar,OEM Body kit
Last edited by Philly X5; 04-23-2011 at 11:02 PM.
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