The other day I just got my check engine light with it being the DEF level sensor being bad. Also something about a secondary water pump not working, I wonder if that's the active to passive tank pump?

Either way, car is headed to the dealership next week. I just have to hope either they have finally extended coverage on this repair (my X5 is a 2011 with 72k miles) or that my 3rd party warranty will cover it. It specifically says it doesn't cover exhaust components, so who knows.