Cracked Head

I have a 6 year old XC60 with c60,000km on the clock.
It recently went into Limp mode and I have been advised by the dealer that it has a cracked head - cost to repair - $25,000.
Apparently this is not normal (phew) but it seems I still have to pay!
Yes, it is out of Warranty, but is there not a reasonable expectation that when I buy a premium car - it would last more than 6 years!?