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F series tuning
Wondering whether to tune my F20 LCI 125i with N20 for a while. Have been told by both BMW mechanics and technicians that it is very hard to detect ECU tunes on the F series by both flash and piggy back.
Car is under warranty until 2021 and is in first year of ownership. Would like to have either a generic tune with pop and bang map or custom tune. Financially, I think JB4 would be more worthwhile. Anyone have any experiences with either JB4 or flash tune in regards with dealer and voiding of warranty?
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