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      03-01-2013, 10:49 AM   #5
ilikebmxbikes
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Drives: S65 1M Clone & E92 M3 4.6L
Join Date: Apr 2011
Location: San Francisco

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Yes, we have some protection and adding DPs won't violate your entire warranty, however, our cars are known to have turbo related issues which a dealer could attribute to DP's and deny the warranty claim, leaving you with the bill. Even if you did hire a lawyer, how much money and time would that cost?

It is best just to have the DP's removed before any warranty work.

Some people leave them on for regular services and have claimed no issues but there have been a small group who have claimed their cars were flagged for engine mods. It really varies per dealer. I personally would just remove them before going in.
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