Vaico V20-2278 Engine Crankcase Breather Hose - Oil Separator To Connector

BMW Crankcase Breather Hose Replacement

Restore crankcase ventilation routing with the Vaico V20-2278 engine crankcase breather hose. This OE-reference hose connects the oil separator to the connector on select BMW 3 Series, 5 Series, and Z4 applications, with fitment tied to OE number 11 61 7 559 530.

VAICO product line parts are built as aftermarket replacement components for direct-fit service on specified vehicle applications. For this hose, the focus is correct routing, OE-number matching, and dimensional consistency for the listed BMW fitments.

Key Features

• Engine crankcase breather hose for the emission control and crankcase ventilation system
• OE reference: 11 61 7 559 530
• Length: 210 mm
• Height: 50 mm
• Width: 140 mm
• Lightweight construction at 0.070 kg
• Positioned from oil separator to connector
• Vaico V20-2278 for OE-style replacement service

Detailed Description

The Vaico V20-2278 is an engine crankcase breather hose used in the crankcase ventilation path between the oil separator and connector. It is specified for BMW applications that use OE number 11 61 7 559 530, including 2004-2006 BMW Z4, 2006 BMW 323i, 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, and 530xi, plus 2007 BMW 525i, 525xi, 530i, 530xi, and Z4. This part number, V20-2278, is the reference to verify before ordering.

This hose supports proper crankcase ventilation routing on BMW 525i and BMW 530i applications where the original hose has aged, cracked, or no longer seals correctly. The listed dimensions and OE-number match help confirm the correct replacement for the specified oil separator to connector location.

What It Helps Fix

• Cracked or brittle breather hose material
• Vacuum leaks in the crankcase ventilation circuit
• Oil vapor routing issues between the oil separator and connector
• Check engine concerns related to ventilation system faults
• Rough idle or drivability problems caused by air leaks

Installation Notes and Tips

Verify OE number 11 61 7 559 530 and confirm the oil separator to connector routing before installation. Compare the old hose length and connection points to the new Vaico V20-2278, especially on BMW 325i, 330i, and Z4 applications where model year and production date matter. Inspect adjoining ventilation components for wear, oil saturation, or damaged fittings before reassembly.

Quality Assurance

Vaico supplies aftermarket replacement parts for specified OE applications, and this hose is cataloged to the OE number and fitment data shown above. Use the part number V20-2278 and the OE reference to confirm application accuracy for your BMW 3 Series, 5 Series, or Z4.