BMW E9X 335i Crankcase Vent Hose 11127584128 (2011-2013)

Restore reliable crankcase ventilation with the Rein Crankcase Vent Hose for select BMW E9X 335i models from 2011 through 2013. This hose routes crankcase vapors from the valve cover and supports proper operation of the engine’s positive crankcase ventilation system. A properly functioning crankcase vent hose helps maintain the intended airflow path and can help prevent vacuum leaks caused by cracked, brittle, or damaged original components.

This BMW 335i crankcase vent hose is designed for vehicles equipped with the Blow-By Heater option, code S4NEA. Verify your vehicle equipment and compare the original hose before ordering to ensure the correct application. Rein manufactures this replacement component to provide a practical solution for maintenance and repair needs.

• Direct replacement crankcase ventilation hose from the valve cover
• Designed for select BMW E9X 335i vehicles with Blow-By Heater S4NEA
• Helps restore proper crankcase vapor routing and engine vacuum performance
• Useful for replacing a worn, cracked, or deteriorated factory hose

Replace the crankcase vent hose when you notice visible cracking, soft or damaged tubing, an engine vacuum leak, rough running, or other signs of a compromised crankcase ventilation system. Addressing a faulty hose can help protect surrounding components from unmetered air and oil vapor contamination while supporting consistent engine operation. Professional installation is recommended if you are unsure about access, fitment, or the condition of related BMW PCV components.

Part number: 11127584128. Additional BMW reference numbers include 11-12-7-584-128, 11 12 7 584 128, and 11.12.7.584.128. Common cross references include ABV0209 and EMH137. Confirm compatibility using your vehicle identification number, production details, and option codes before purchase.