I have a PO 174 B ( bank 2 system too lean) CHECK ENGINE CODE. How much to fix. on 2006 BMW X3

I want to know how much will cost to repair.

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2 answers 1 comment
you have to have it diagnosed it could be a vacuum leak bad injector fuel pressure regulator so you have to have it checked at a german garage
Just bought X3, can this be expensive to fix?
Get the transfer case fluids replaced right away. Very expensive to repair.

When i bought mine, i replaced the spark plugs, oil and all filters.