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      09-12-2013, 01:01 PM   #15
gunda
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Canada
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Drives: 2008 BMW 335i e92
Join Date: Apr 2012
Location: Mississauga

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no you can just install the Jb4 and adjust them all using the dash/wheel controls. The laptop is used for updating to the latest firmware and installing the BMS backend flash. If you just ran out of warranty recently and the rattle started, BMW might honor it and replace your turbos.