Oil separator diaphragm for VOLVO and FORD vehicles with 2.0 L, 2.4 L, 2.5 L V5 engines. ORIGINAL Volvo oil separator numbers: *30788494 *31338684 *31338685 *30677920 ORIGINAL Ford oil separator numbers: *1781598 Please verify the part number on your vehicle before ordering. The manufacturer does not sell the membrane separately, but only offers to replace the Volvo or FORD oil filter housing Assembly, which has a built-in crankcase oil separator. Although in fact, only the membrane, which is a mobile link in this system, is destroyed. It takes 15 minutes to replace the membrane, and we suggest you save $ 220 for that 15 minutes. After all, a new oil filter housing with an oil separator Volvo, FORD costs an average of $ 240. The membrane is made of material that is resistant to aggressive environments and temperature changes. Replacing this membrane is not difficult-the main thing is to carefully open the membrane cover without damaging it. Remove the old membrane and spring, clean the seat and lid of carbon and dirt, lubricate with silicone and assemble in the reverse order. After replacing the membrane, the motor may run erratically for some time - the engine control unit will adapt to the new volume of air.