Dorman 46103 Engine Crankcase Breather Hose Check Valve

Engine Crankcase Breather Hose Check Valve

Dorman 46103 is an engine crankcase breather hose check valve built to match the fit and function of the original valve on specified BMW applications. The black plastic construction is engineered for durable, reliable performance in crankcase ventilation service.

Key Features

• Direct-fit replacement for the original crankcase breather hose check valve
• Black plastic construction for everyday engine-bay use
• Matches OE fit and function for specified BMW crankcase ventilation systems
• Supports proper crankcase ventilation routing in cold weather specification applications
• Cross-references Dorman 46103 for the same application

Detailed Description

This Dorman 46103 engine crankcase breather hose check valve is designed for BMW crankcase ventilation systems that use cold weather specification hoses. It serves as a replacement for the original valve on applications such as BMW 325Ci, 330Ci, X3, X5, 320i, 325i, 325xi, 330i, 330xi, 525i, 530i, Z4, Z3, 323Ci, 323i, 328Ci, and 328i across the listed model years. If you are servicing a BMW crankcase breather hose check valve, this part provides a direct OE-style solution for the specified vehicles.

This part cross-references Genuine 11617534237 and TechSmart Z16005 for the same application.

What It Helps Address

• Cracked or worn crankcase breather hose check valve
• Improper crankcase ventilation flow
• Vacuum-related drivability concerns tied to ventilation faults
• Oil vapor routing issues in the crankcase ventilation system
• Service replacement needs on BMW cold weather specification setups

Installation Notes and Tips

Verify the vehicle’s year, model, and cold weather specification before installation. This valve is used in crankcase ventilation service on BMW applications with insulated hose routing, so inspect the connected hoses and surrounding ventilation components for wear, brittleness, or contamination during replacement. Confirm the part number 46103 against the original component before installation.

Quality Assurance

Dorman engineers this replacement valve to match the original part’s fit and function on the listed BMW applications. The plastic housing is selected for durability and dependable service in engine crankcase ventilation use.