DIAPHRAGM ST 2.5T 220 225 OIL FILTER MEMBRANE REPAIR 31338685 Fits FORD FOCUS

31338685, 31338684, 30788494-PM6. This is an Oil Filter Housing Diaphragm(The Crankcase Oil Trap/Oil Separator/PCV Breather). Not only are you saving money on just buying the part you need, you can save money by fitting it yourself!