URO 06B103221L Engine Crankcase Breather Hose Connector

Engine Crankcase Breather Hose Connector for Audi

This URO engine crankcase breather hose connector restores the crankcase ventilation path when the original hose connector fails. It is built for a guaranteed fit on select Audi applications and helps maintain proper hydrocarbon emission control.

Compatible with 2004-2006 Audi A4 and 2004-2005 Audi A4 Quattro, this connector is a direct replacement for part number 06B103221L.

Key Features

• URO replacement part for crankcase ventilation service
• Material: AEM for resistance to engine heat and oil vapor
• Black finish
• Length: 104
• End inside diameters: 19.2 mm, 22.95 mm, and 19.25 mm
• Single-branch, 3-way hose connector design
• Direct-fit replacement for 06B103221L

Detailed Description

This engine crankcase breather hose connector is used at the valve cover on select Audi A4 and Audi A4 Quattro models. It replaces a failed OE hose connector to restore crankcase breather function, helping the engine ventilation system manage blow-by gases and hydrocarbon emissions as intended. The AEM construction is selected to resist cracking and splitting from heat cycling and oil vapor exposure, which are common causes of breather hose failure.

Part number 06B103221L is a direct OE reference for this application, and the connector is also listed under 06B 103 221L, 147 54069 001, and URO-013129 for cross-reference purposes. If you are searching for an Audi A4 crankcase breather hose connector, Audi A4 Quattro valve cover breather hose connector, or a replacement for 06B103221L, this part matches those needs.

What It Helps Fix

• Cracked or split crankcase breather hose connector
• Loss of crankcase ventilation flow at the valve cover
• Oil vapor leaks around the breather hose connection
• Emission control issues caused by a failed breather path
• Vacuum-related drivability problems tied to breather hose damage

Installation Notes and Tips

Install at the valve cover on the listed Audi applications and verify the hose routing before final assembly. Inspect the surrounding breather hoses and fittings for heat damage, oil saturation, or hardening before installing the new connector. Confirm the end diameters and branch layout match the original part number 06B103221L before installation.

Quality Assurance

URO backs this replacement with a 24 Month Unlimited Mileage Warranty. The part is engineered as a fitment-matched replacement for the specified Audi A4 and Audi A4 Quattro applications.