Rein ABH0337 Engine Oil Separator

OE-Style Engine Oil Separator for BMW

Rein ABH0337 is a standard replacement engine oil separator built for European vehicle applications that require an OE-quality breather valve. It is a direct replacement for the original-style part and matches the OEM design for proper crankcase ventilation service.

Key Features

• Standard replacement engine oil separator for crankcase ventilation service
• OE-quality breather valve construction for BMW applications
• Direct replacement design that matches the original part layout
• Fits BMW Z4, BMW M3, and BMW Z3 applications listed below
• Cross-references BMW 11157840446 for the same application
• Part number ABH0337 for catalog and fitment lookup

Detailed Description

Rein ABH0337 is an engine oil separator used in the breather system to manage oil vapor and crankcase ventilation flow. Built as a standard replacement, it serves BMW owners looking for an OE-style service part for models including the 2006-2008 BMW Z4, 2001-2006 BMW M3, and 2001-2002 BMW Z3. The Rein ABH0337 part number is useful when matching the correct breather valve replacement for these European applications.

Rein Automotive positions this breather valve line as an OE-quality replacement for European vehicles, with dimensions and function aligned to the original manufacturer part. This part cross-references BMW 11157840446 for the same application.

What It Is Used For

• Replacing a worn or failed crankcase breather valve
• Restoring oil vapor separation in the engine ventilation system
• Addressing rough idle caused by breather system faults
• Correcting oil consumption concerns linked to separator wear
• Resolving vacuum leaks related to a damaged oil separator assembly

Installation Notes and Tips

Verify the vehicle year, model, and engine application before ordering. For fitment reference, this part fits 2006-2008 BMW Z4, 2001-2006 BMW M3, and 2001-2002 BMW Z3. Inspect connected breather hoses and seals during replacement so the new separator can operate correctly. Confirm the part number ABH0337 against the original component and OE reference before installation.

Quality Assurance

Rein Automotive supplies OE-quality replacement breather valves for European vehicles, with this part engineered as a direct replacement for the original-style component. The OE reference listed for this application is BMW 11157840446.