Set of 5 Pieces Crankcase Vent Valve Breather Hose Kit Fits for BMW E46 E39 E60 320i 323i 325 325i 325ci 328i 330i 330ci 330xi 525i 528i - PCV Crank Case Ventilation Oil Separator Hose 11617501566
Brand: Benefast

Crankcase Vent Valve Breather Hose Kit - 5 Piece Value Kit - Compatible with BMW Vehicels - E46, E39, E60 320i, 323i, 325, 325i, 325ci, 328i, 330i, 330ci, 330xi, 525i, 528i - PCV Ventilation Separator PCV Crankcase Ventilation Oil Separator Hose - Compatible with BMW E46 3 Series E39 E60 X3 X5 - Replace 11157532649 11617501566 11611432559 -PCV Valve Crankcase Positive Exhaust Valve Hose Kit for BMW

The crankcase vent system separates liquid oil from the air inside the engine and intake. When working correctly, oil is removed from the intake air and returned to the oil pan. Oil vapor remains and is burned up in the combustion chamber. Every car has some form of crankcase ventilation, also known as a PCV, CCV, oil separator, and a cyclonic separator.
PCV system are notoriously failure prone, leading to high oil consumption, burning oil, loss of power, misfiring, and high carbon deposits. Signs of a failing PCV include: whistling noises in the intake, blueish smoke in the exhaust, high oil consumption, and thick white or yellow gunk under the oil cap. When it happens on your BMW cars, you can take this PCV Hose Kit for direct replacement.
Fits for the Following Vehicles: for 2001-2005 BMW 320i, 2000 BMW 323Ci, 2000 BMW 323i, 2001-2002 BMW 325Ci, 2003-2005 BMW 325Ci M54, 2006 BMW 325Ci, 2001-2002 BMW 325i, 2003-2005 BMW 325i M54, 2000 BMW 328Ci, 2000 BMW 328i, 2001-2006 BMW 330Ci, 2001-2005 BMW 330i, 2001-2005 BMW 330xi 325xi, 2001-2005 BMW 525i, 2000 BMW 528i, 2001-2005 BMW 530i, 2004-2006 BMW X3, 2000 BMW Z3 2.8 L6, 2000-2002 BMW Z3 2.5 L6, 2001-2002 BMW Z3 3.0 L6, 2003-2005 BMW Z4.
Customers can find the product you need accurately according to the OE number. OE part number: Crankcase Pressure Regulator Valve 11617501566, Upper Oil Separator Vent Tube 11617504535, Crankcase Vent Return Pipe 11617504536, Oil separator to valve cover 11611432559, Oil separator to dipstick tube 11157532649.
BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. Crankcase breather valve is used to purge oil vapor from engine block into valve cover. However, sometimes condensation can cause it to freeze, causing entire oil separator system to fail, crack, and disintegrate. Replace all components of oil separator system together to prevent damage to all aspects of engine.