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      06-11-2011, 08:42 AM   #3
IMG
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Drives: E36 M3 Track car,Ess E90 M3 DD
Join Date: Feb 2008
Location: Location

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Whenever you take your car to the dealer for an ECU software update,BMW automatically lock your ECU after loading the updated software.
Most after market tuners takes a day or two to unlock your ECU so they can load the performance software again.
I went through it twice when i was NA !!!!