1994-2007 BMW Engines Crankcase Ventilation System Check

All current BMW engines (M42 (from 1/94), M44, M52, S52, M60, M62 and M73 engines) incorporate a pressure-controlled crankcase ventilation system. If oil consumption issues are being diagnosed, this information can be helpful. The crankcase ventilation systems use various crankcase ventilation valves depending on the engine type as shown in Figure 1 below.