Dorman 917-125 PCV Valve Tubing

Dorman 917-125 PCV Valve Tubing

Dorman 917-125 is a crankcase vent tube for BMW applications that routes vapors from the valve cover to the oil separator. Built from plastic to resist cracking and brittleness, it replaces a worn or leaking original hose and helps restore proper crankcase ventilation.

Key Features

• Plastic construction for resistance to cracking and brittleness
• Quick-connect attachment for a direct replacement-style connection
• Inside diameter: 0.64 in.
• Outside diameters: 0.74 in. and 0.87 in.
• Replaces the crankcase vent tube between the valve cover and oil separator
• OE cross-reference: Genuine 11157522931

Detailed Description

This PCV valve tubing is engineered for BMW crankcase ventilation service where the original hose has aged, split, or begun leaking. Dorman 917-125 is used on 2006-2008 BMW Z4 and 2006-2007 BMW 525i, 525xi, 530i, 530xi, 325i, 325xi, 330i, and 330xi applications with the valve cover to oil separator routing. It is a direct-fit crankcase vent tube replacement for maintaining the intended flow path in the emission control system.

This part cross-references Genuine 11157522931 for the same application.

What It Helps Address

• Cracked or brittle PCV hose material
• Oil vapor leaks at the crankcase vent line
• Improper crankcase ventilation routing
• Vacuum-related drivability issues caused by hose leakage
• Replacement needs for BMW valve cover to oil separator tubing

Installation Notes and Tips

Verify the hose routing before removal and compare the quick-connect ends to the original tube. This Dorman 917-125 is intended for BMW 325i, 330i, 525i, 530i, and Z4 models listed in the fitment data, with the valve cover to oil separator configuration. Inspect adjacent ventilation components for wear or oil contamination during service.

Quality Assurance

Dorman manufactures replacement components using materials selected for durability in underhood conditions. Part number 917-125 is built as a service replacement for the original crankcase vent tube and is backed by Dorman’s product engineering standards.