Genuine 11157522931 Engine Crankcase Breather Hose

Engine Crankcase Breather Hose for BMW

This Genuine engine crankcase breather hose, part number 11157522931, routes vapors between the valve cover and vent valve to support proper crankcase ventilation. It is a direct-fit replacement for select BMW 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, and Z4 models.

• Genuine OE replacement crankcase breather hose
• Part number 11157522931 for direct identification
• Fits valve cover to vent valve routing on listed BMW applications
• Built for emission control and crankcase ventilation service
• Compatible with 2006-2007 BMW 525i, 525xi, 530i, and 530xi
• Compatible with 2006 BMW 325i, 325xi, 330i, 330xi, and Z4 through 10/06

Fitment Details

• Fits 2006-2007 BMW 525i, N/A, Valve Cover to Vent Valve
• Fits 2006-2007 BMW 525xi, N/A, Valve Cover to Vent Valve
• Fits 2006-2007 BMW 530i, N/A, Valve Cover to Vent Valve
• Fits 2006-2007 BMW 530xi, N/A, Valve Cover to Vent Valve
• Fits 2006 BMW 325i, N/A, Valve Cover to Vent Valve
• Fits 2006 BMW 325xi, N/A, Valve Cover to Vent Valve
• Fits 2006 BMW 330i, N/A, Valve Cover to Vent Valve
• Fits 2006 BMW 330xi, N/A, Valve Cover to Vent Valve
• Fits 2006 BMW Z4, N/A, Thru 10/06; Valve Cover to Vent Valve

What It Helps Address

• Cracked or leaking crankcase breather hose
• Vacuum leaks in the crankcase ventilation path
• Oil vapor routing issues between the valve cover and vent valve
• Emission control faults related to crankcase ventilation
• Rough idle or drivability concerns tied to air leaks

Installation Notes

Install on the valve cover to vent valve connection shown in the fitment notes. Verify the hose routing and connection points before installation, and compare the original hose to part number 11157522931 to confirm application details for your BMW 325i, 330i, or 530i platform.

Quality Assurance

Genuine OE replacement part for the listed BMW applications. This part cross-references with BMW OE reference 11157522931 for the same application.