Originally Posted by RambleJ
I think the Dinan tune DOES void your BMW warranty. That is why if you have the Dinan tune you cannot get your car CPO'd through BMW.
No, it does NOT void your warranty. That's a ridiculous assumption - and would certainly not explain how I have had Dinan on both new and CPO cars and never had any issues with warranty, including the extended CPO warranty that goes beyond the 4/50 factory warranty. You pay more for Dinan equipment and software because they stand behind their products with a parallel warranty. Parallel, as in "in addition to", not replacement. So let's set the record straight here - Dinan DOES NOT VOID YOUR WARRANTY!