We haven't ever had to warranty any suspension stuff for a torsion bar failure. If the torsion bar fails, and it's aftermarket, then the aftermarket maker would be responsible. If the aftermarket bar sags, then the owner is responsible for the adjustment and subsequent alignment.

If the bar fails, and damages any components, then the maker should also be responsible for that damage as well.

Don't overthink it. It's not something to worry about it.

Besides, alignment and tire wear issues are only covered for the first 12 months, 12k miles.