URO 11617533399 Engine Crankcase Breather Hose

Engine Crankcase Breather Hose for BMW

This URO engine crankcase breather hose restores the crankcase ventilation path when the original hose cracks, splits, or loses sealing. It is a direct-fit replacement for select BMW models and is built for cold climate applications where heat and oil vapor can accelerate hose wear.

• Direct replacement crankcase breather hose for emission control service
• Fits cold climate versions with vent valve to connecting hose routing
• EPDM PA6 / PA 12 GF50 construction resists engine heat and oil vapor exposure
• Molded design with 2 branches and 3 hose connectors
• 0.71 in. inside diameter at End 1 and End 2; 0.20 in. inside diameter at End 3
• Guaranteed fitment for listed BMW applications

Fitment and application details

Compatible with select BMW crankcase ventilation system layouts, including 2001-2006 BMW 325Ci, 330Ci, 325i, 325xi, 330i, 330xi, 525i, 530i, 2003-2005 BMW Z4, 2004-2006 BMW X3, 2005-2006 BMW X5, 2003-2004 BMW X5 with production date from 10/03, 1999-2002 BMW Z3, 2000 BMW 323Ci, 1999-2000 BMW 323i, 2000 BMW 328Ci, and 1999-2000 BMW 328i. This part number is URO 11617533399, and it cross-references VAICO V20-1563 for the same application.

Use this hose when servicing the crankcase breather circuit on BMW 325Ci, 330Ci, and related models to maintain proper ventilation routing and emissions control performance. The molded shape helps match the original hose path from the vent valve to the connecting hose.

What this hose helps correct

• Cracked or split crankcase breather hose
• Loss of crankcase ventilation flow
• Oil vapor leaks around the breather circuit
• Improper hydrocarbon emissions control from a failed hose
• Fitment issues caused by an aging OE-style hose

Installation notes

Confirm the vehicle is a cold climate version before ordering, since the listed fitment applies to that configuration. Match the hose routing from the vent valve to the connecting hose and verify the connector sizes against the original part before installation. The molded design is intended to follow the factory path on the specified BMW applications.

Quality assurance

URO backs this replacement hose with a 24-month unlimited mileage warranty. The hose is made from materials selected to resist cracking and splitting from engine heat and oil vapor, supporting long-term service in the crankcase ventilation system. Part number 11617533399 is also listed under BMW OE reference 11 61 7 533 399.