Gates EMH231 Engine Crankcase Breather Hose - Oil Separator To Dipstick or Oil Separator To Oil Pan

Gates EMH231 Crankcase Breather Hose

The Gates EMH231 is an OE-exact engine crankcase breather hose for emission control service. Built from durable plastic with molded, clip-on ends, it restores crankcase ventilation routing and helps return the emission system to proper operation on select BMW applications.

Gates Emission Control Hose components are built for direct replacement use, with OE-style dimensions and connection points that match the original routing. This makes the EMH231 a practical choice for BMW 323i, 325i, 330i, 525i, and 530i models that use this crankcase ventilation hose layout.

Key Features

• OE-exact replacement for crankcase ventilation and emission control service
• Fits BMW applications with oil separator to oil pan or oil separator to dipstick routing
• Plastic construction with molded hose shape for consistent fit
• Clip-on end type at both connections for direct installation
• Protective sleeve included for added hose protection
• Inside diameters: 9 mm (0.36 in) and 13 mm (0.5 in)
• Centerline length: 305 mm (12 in)

Detailed Description

The Gates EMH231 crankcase breather hose is part of the Gates Emission Control Hose line, a product line focused on OE-style replacement hoses for emission and crankcase ventilation systems. This hose is molded to match original routing and connection geometry, helping maintain the intended path between the oil separator and the oil pan or dipstick tube on covered BMW models. The EMH231 is an OE Exact replacement and uses two clip-on quick connectors for a direct service fit.

This part cross-references Genuine 11157567801 for the same application. It is also listed under Gates EMH231 for catalog and service identification.

What It Helps Address

• Cracked or brittle crankcase breather hose
• Vacuum leaks in the crankcase ventilation circuit
• Oil separator hose routing issues
• Emission system performance concerns caused by hose deterioration
• Improper connection at the oil separator, dipstick, or oil pan routing points

Installation Notes and Tips

• Verify the hose routing before removal, especially on BMW 323i, 325i, 330i, 525i, and 530i applications.
• Inspect the oil separator and adjoining connectors for wear, buildup, or damage before installing the new hose.
• Confirm the clip-on ends are fully seated at both connection points.
• Check surrounding ventilation lines and seals for related leaks while servicing the hose.

Quality Assurance

Gates manufactures this hose as an OE-exact replacement using high-quality materials for durability and service life. The EMH231 is built to restore emission system operation with original-style fit and function on the listed BMW applications.

• Fits 2006-2011 BMW 323i, Oil Separator To Oil Pan
• Fits 2006-2007 BMW 525i, Oil Separator To Dipstick
• Fits 2006-2007 BMW 530i, Oil Separator To Dipstick
• Fits 2006 BMW 325i, Oil Separator To Dipstick
• Fits 2006 BMW 330i, Oil Separator To Dipstick, Oct. 2005 & Newer