Gates EMH911 Engine Crankcase Vent Valve - Oil Separator

Gates EMH911 Crankcase Vent Valve Overview

The Gates EMH911 is an OE-exact crankcase vent valve assembly for emission control service. Built from plastic and supplied as an oil separator with an insulating sleeve, it is made to restore crankcase ventilation function and support proper emission system operation on select BMW applications.

Compatible with BMW 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, and Z4 models in the listed oil separator position, this part number is a direct-fit service solution for common crankcase ventilation repairs. The Gates EMH911 is also referenced by Genuine 11617531423 and Rein ABH0175 for the same application.

Key Features

• OE-exact crankcase vent valve / oil separator design
• Plastic construction for application-specific fitment
• Three hose connectors for the listed BMW ventilation routing
• Includes oil separator and insulating sleeve
• Built for emission control system service on BMW crankcase ventilation systems
• Gates EMH911 part number for easy identification

Detailed Product Description

Gates EMH911 is part of the Gates Crankcase Vent Valve line, a product line focused on OE-style crankcase ventilation pressure regulators, PCV valves, and oil separators. This unit is engineered to match the original configuration closely so the crankcase ventilation system can be returned to proper operation without unnecessary modification. With inside diameters of 0.6 in (15 mm), 0.715 in (19 mm), and 0.9 in (23 mm), plus three hose connectors, it is specified for the BMW oil separator applications listed below.

Fits 2006-2007 BMW 525i, Oil Separator; Fits 2006-2007 BMW 525xi, Oil Separator; Fits 2006-2007 BMW 530i, Oil Separator; Fits 2006-2007 BMW 530xi, Oil Separator; Fits 2006 BMW 325i, Oil Separator; Fits 2006 BMW 325xi, Oil Separator; Fits 2006 BMW 330i, Oil Separator, Oct. 2005 & Newer; Fits 2006 BMW 330xi, Oil Separator; Fits 2006 BMW Z4, Oil Separator.

Common Issues This Part May Address

• Crankcase ventilation system fault codes related to oil separation
• Excess crankcase pressure from a worn or restricted vent valve
• Oil vapor management problems in the emission control system
• Rough idle or drivability concerns tied to ventilation restriction
• Vacuum-related leaks at the oil separator assembly

Installation Notes and Tips

Verify the vehicle’s production date and engine-specific routing before installation, especially on the 2006 BMW 330i with the Oct. 2005 & newer note. Confirm hose sizes and connector locations against the original part, and inspect adjacent ventilation hoses for wear, cracking, or oil saturation before reassembly.

Quality Assurance

Gates supplies OE-exact crankcase ventilation components intended to match original fit and function for emission system service. The EMH911 is built to restore the ventilation system to desired operating performance on the listed BMW applications.