me?
Nah, not you bud.
Are we still talking about warranty? If so then you can upgrade within reason. So you could put any E-marked brake pad on, but if you fit a BBK and the suspension fails you're likely not going to be covered (manufacturer will argue that you're putting extra stress where none was intended, and I bet their lawyer costs more than yours).
Highly unlikely to be enforceable in court, it goes directly against European law so would almost definitely be classed as an unfair term.
Modification restrictions, on the other hand, would almost certainly be enforceable on a PCP agreement. So no remaps, but consumables would be fair game if they'd genuinely worn out.