I worked for an automotive company for a while and I recall a meeting wherein were learned about compliance, fault, maintaining records, etc. One thing I learned is that you do not know how far lawyers will go to reach a verdict or a settlement. And if you're reading this right now, I will tell you do not know how far a lawyer and their clients will go to reach a settlement. And that's lawyers on both sides of any argument.

If you ever have an opportunity to attend a training/info seminar put on by legal, I promise you it is way more interesting than it sounds on the face of it.

In the US it would not void your warranty.

I wouldn't even try to root it; all I'd ask for is to be able to reach the antenna plug and stick in there a dummy load.