As it says on the tin: Have a wild population of Auroch (or many populations) survive into the present day.
As it says on the tin: Have a wild population of Auroch (or many populations) survive into the present day.
Could it survive by simply being domesticated somewhere in its original form, without being bred to produce cattle?
That would require a very liberal conservative movement in the middle ages.
Modern European cattle probably are bred from the aurochs. Or at least that's what I read.