You can always familiarize yourself with the magnuson-moss warranty act - but that means *learning* it inside and out. Just mentioning it isn't a magic cheat code to get you covered; if anything, that attitude will get you even more scrutiny. If you have issues, play dumb, get their denial (and justification) in writing (because you don't understand) and you can proceed as you need to. From experience, if you're leaning on the Magnuson-moss you usually already know you did something you shouldn't have. If you do have something actionable under magnuson-moss, it's probably going to cost you more in legal fees than it would to just pay for the repair. Sometimes it comes down to asking "What do I need to do to get myself back in compliance with the warranty". A good-faith effort on your behalf can sometimes nudge the pendulum of judgement back in your favor.
I have spent lots of time in court and will attest, it is usually not worth it if you factor in the value of your time.
A new long block might be a few grand, but they can keep stalling and petitioning for new dates while they wait you out, costing you missed days of work, changing venues, etc. while they try to run you out of money.
This has been a really long way of saying, "Don't do the crime if you can't do the time".
Oh, also - document *everything*.