Originally Posted by jasonlu
if you install a DINAN STAGE, will it influence your warranty?
Yes and no. If you go to a Dinan certified dealership, theoretically any warranty issues should be invisible to you. In other words, either BMW will pay or Dinan will pay and you never need to find out who paid because it got fixed and you didn't owe anything. That was my experience at least.
With that being said, you can't get an extended warranty to cover the Dinan parts. They may sell you the extended warranty, but it won't cover anything you modify. So, in other words, if you modify the engine software, they could argue that you'd lose the warranty altogether because that could be considering modifying the engine and the turbos. That's one of the reasons I traded it in.