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      09-09-2019, 11:50 AM   #6
Dav3
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Drives: G87 M2/E89 35is/F21 M140i/GT4
Join Date: Oct 2016
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Quote:
Originally Posted by idle918 View Post
Hey All,

I am surprised this isn't talked about more but what mods actually void warranty? I am considering a few things and want to make sure it doesn't void my warranty.
It's not really a black and white answer

Legally, BMW sells you a car in 'X' form and characteristics and applies a warranty that solely covers the car in it's stock (trial and tested) form.

Anything and everything you do to the car that has a direct negative impact or an indirect domino effect on other components, legally voids your warranty.

Generally speaking, everything cosmetic or not directly related to the engine generally just voids the warranty for the specific component. Engine mods on the other hand are a bit more tricky. If you break your engine and need a new one, BMW Corporate typically sends an engineer to investigate. ECU Tune/Piggyback will most certainly be detected through logging and in this case your warranty is thrown out of the window instantly.
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