And I disagree 99.99%. ZLYKOT reminds us of a very important Act in place to protect us from having any auto warranty automatically voided from any/all modifications. Or not following the manufacturers "rules".
There are plenty of examples out there that support an owners right to deviate from what we are made to believe be written in stone. A modification does not always void warranty, nor do aftermarket parts. Both of which can actually improve on OEM performance and longevity. Have an honest conversation with an intelligent automotive engineer sometime, it's eye opening. And nobody will ever convince me that any mechanic can change my air filters, oil, clutch, and transaxle fluids, or flush my brake lines with more luv and time than I give my vehicles.
If a warranty issue can not be proven to be the reason for failure, the warranty must be honored. Of course our legal system stopped "innocent until proven guilty" long ago, so collect and keep the paperwork....and CYA !