Hi guys just joined the forum. I’m trying to return a mini to a dealer I bought it from a week ago. It has leaky valve stem oil seals that have damaged the o2 sensors. My question is this. If I’m not successful returning the Cooper how much would I be looking at to get it fixed? It’s a 2009 Mini Cooper Clubman and I believe it’s driven quite a few miles with this problem, is guzzling oil not smoking so you would notice and other than that drives great.