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tencazzo · 01-23-2016, 04:55 AM

Could anyone tell me if it is necessary to disconnect the negative battery terminal in the trunk before removing ECU to tune? Are there any possible ECU damages if I failure to do so?

01-23-2016, 04:55 AM	#21
tencazzo Private 12 Rep 70 Posts Drives: BMW 220i M Sport Join Date: Feb 2015 Location: Germany iTrader: (0)	Could anyone tell me if it is necessary to disconnect the negative battery terminal in the trunk before removing ECU to tune? Are there any possible ECU damages if I failure to do so?
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