Diesel BMW X6 maintenance (M57, N57, B57 families)
BMW X6 diesel engines in this range include M57, N57 and B57 variants, and routine servicing generally centres on correct oil quality, oil filter changes and keeping the air and fuel filtration in good order. Modern diesels are sensitive to short-trip use, so pay attention to any signs of restricted airflow or rising oil level, and follow the specified service requirements for your exact engine. Cooling system condition, auxiliary drive components and intake sealing are also worth checking at service time because they can affect drivability and emissions control. If your X6 is used for towing or frequent stop-start driving, expect some maintenance items to come around sooner than on motorway-only use.