My May 08 build E92 is due for routine service which the dealer tells me includes a software update. Can I leave the new controller in or do I need to put the original controller back in for the software update?
'15 f82 M4 M-DCT (Black Sapphire)
'08 e92 M3 M-DCT (Jerez Black) - Sold
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'02 e46 M3 SMG coupe (Carbon Black) - Sold