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      07-12-2020, 03:12 PM   #7
Swagasaurus-R3X
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Drives: BMW M340i
Join Date: May 2020
Location: Tracy, CA

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I called BMW last week to ask about flashing and different piggy back systems. Without me eluding about the JB4 they stated they see maybe 1 or 2 of them a year and can detect if a car has had a piggy back on it through the number of key cycles. I am not really educated in this but would like to know 100% if it can be detected because I would like to install the JB4 but don't want to risk warranty.
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