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Vodka G · 05-08-2008, 05:12 PM

i've got a question re: ESS ECU upgrade.....for the Z4M
1. is that just a flash?? or is the ECU physically removed and worked on
2. if it is 'flashed' is it detectable by dealership??
3. how can it be turned back to 'stock'

05-08-2008, 05:12 PM	#31
Vodka G New Member 0 Rep 11 Posts Drives: A Horse Join Date: May 2008 Location: Earth (SoCal) iTrader: (0)	i've got a question re: ESS ECU upgrade.....for the Z4M 1. is that just a flash?? or is the ECU physically removed and worked on 2. if it is 'flashed' is it detectable by dealership?? 3. how can it be turned back to 'stock'
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