Note i would recommend that if you dotn have money for service then simply get the extended warranty if available. from the dealer it is called CPO (Certified PreOwned) You wont us eit a lot because BMW really makes a good vehicle. However, when things do go wrong they can be a little expensive.
This one is called OPey
2009 BMW Z4 sDrive 3.0i
I call her weezey
2006 BMW Z4 3.0i Roadster - Sold and I miss her.