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N20 Tuning for pussies (meaning me!)
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01-23-2016, 04:55 AM
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tencazzo
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Drives: BMW 220i M Sport
Join Date: Feb 2015
Location: Germany
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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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