Quote:
Originally Posted by BrokenVert
It can yes. The ECU will store a fault code that will flash for the dealer when they read your car. This is why anyone who tunes has a BT tool, you can find and clear those fault codes before your dealer sees them
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This is NOT true!
I have a flash tune and a BT scan tool. There are never any tuner codes thrown nor even a CEL or SES light w/my tune. A flash tune simple WORKS. Someone who is running apiggy tune can not say the same.
I think this whole topic that BMW can tell whether you have a tune or not is all total BS. Even with a piggy back tune - BMW can tell. Someone here posted a pdf from BMW NA showing thier techs how to recognize the tell tale evidence when the ECU box has been messed with. Broken clips and dust and strange wires.
I want someone to post some evidence that BMW can find a tune. I really doubt they can. Not enless they call in a special engineer to look into your DME/ECU.
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EDIT: see my post bellow. Looks like this is true fellas!!
