Vaico V20-1784 Engine Crankcase Breather Hose - PCV Valve To Hose Connector

Engine Crankcase Breather Hose for BMW

Vaico V20-1784 is an engine crankcase breather hose for the emission control and crankcase ventilation system. It is built to match OE number 11 15 1 740 393 and serves as the PCV valve to hose connector on select BMW applications, including BMW Z3, 323i, 328i, 528i, and M3 models.

VAICO product line components are developed as OE-style replacement parts for European vehicles, with application-specific dimensions and fitment details that support direct replacement on the listed BMW models.

• OE reference: 11 15 1 740 393
• Part number: V20-1784
• Length: 225 mm
• Width: 16.2 mm
• Height: 16.2 mm
• Weight: 0.055 kg
• Fits the PCV valve to hose connector location
• Cross-reference: Febi-Bilstein 47198
• Cross-reference: Gates EMH123

Detailed Fitment and Function

This crankcase breather hose is used in the crankcase ventilation path to connect the PCV valve to the hose connector. It is listed for 1996-1999 BMW 328i, 1996-1999 BMW M3, 1997-2000 BMW Z3, 1997-1998 BMW 528i, 1998-1999 BMW 323i, and 1998-1999 BMW Z3 with cold-climate exclusions noted in the fitment data. For BMW owners searching for a BMW Z3 crankcase breather hose, BMW M3 PCV valve to hose connector, or BMW 328i emission control hose replacement, V20-1784 matches the OE reference provided.

What This Part Helps Address

• Cracked or split crankcase breather hose
• Vacuum leaks in the PCV/crankcase ventilation circuit
• Oil vapor routing issues caused by a damaged connector hose
• Rough idle or drivability concerns linked to intake air leaks
• Emission control faults related to crankcase ventilation plumbing

Installation Notes

Verify the OE number 11 15 1 740 393 and compare the hose length and connector location before installation. Confirm the vehicle’s model year and any fitment notes, including the 1999 BMW 528i cutoff to 09/1998 and the 1998-1999 BMW Z3 cold-climate exclusion. Inspect adjoining PCV and breather components for wear so the replacement hose seals correctly.

Quality Assurance

Vaico V20-1784 is an OE-referenced replacement part built to the listed dimensions and application data for BMW crankcase ventilation service. The part number V20-1784 and OE number 11 15 1 740 393 provide a direct reference for ordering and fitment verification.