URO 1190940312 Engine Air Distribution Hose Connector

Mercedes-Benz Breather Hose Connector

This URO engine air distribution hose connector is a direct-fit replacement for cracked or leaking breather hose connections in select Mercedes-Benz applications. Built from black NBR rubber, it helps restore proper air and fuel balance by maintaining a secure path between the left cylinder head breather hose and the intake manifold breather hoses.

Use URO part number 1190940312 when you need a replacement for worn connector routing in Mercedes-Benz CL500, S420, S500, SL500, E420, E500, 400E, 400SEL, 500E, 500SEC, 500SEL, 500SL, and 400SE applications.

Key Features

• URO engine air distribution hose connector for fuel injection system and related components
• Black NBR rubber construction for durability and resistance to engine-bay conditions
• Two 9 mm inlet openings and one 9 mm outlet opening
• Approximate dimensions: 39 x 38
• Direct replacement for damaged breather hose connectors
• Helps maintain proper engine air/fuel ratio for consistent power and mileage

Detailed Description

This connector is used in the crankcase breather and intake hose routing on select Mercedes-Benz V8 models. It connects the left cylinder head breather hose to the intake manifold breather hoses, helping preserve the intended airflow path through the engine’s air distribution system. When the original connector cracks, hardens, or leaks, drivability and idle quality can suffer. Part number 1190940312 is built as an OE-style replacement for the listed Mercedes-Benz fitments and is also referenced by VAICO V30-0868.

Fits 1998-1999 Mercedes-Benz CL500, N/A; Fits 1994-1999 Mercedes-Benz S420, N/A; Fits 1994-1999 Mercedes-Benz S500, N/A; Fits 1994-1998 Mercedes-Benz SL500, N/A; Fits 1997 Mercedes-Benz E420, N/A; Fits 1994-1995 Mercedes-Benz E420, N/A; Fits 1994 Mercedes-Benz E500, N/A; Fits 1992-1993 Mercedes-Benz 400E, N/A; Fits 1993 Mercedes-Benz 400SEL, N/A; Fits 1992-1993 Mercedes-Benz 500E, N/A; Fits 1993 Mercedes-Benz 500SEC, N/A; Fits 1992-1993 Mercedes-Benz 500SEL, N/A; Fits 1993 Mercedes-Benz 500SL, N/A; Fits 1992 Mercedes-Benz 400SE, N/A.

Common Problems This Part Addresses

• Cracked breather hose connector causing vacuum or air leaks
• Leaking intake breather routing that affects idle stability
• Hardened rubber connector from age and heat exposure
• Improper engine air/fuel ratio from damaged hose connections
• Reduced engine performance or mileage caused by unmetered air leaks

Installation Notes and Tips

Verify the hose routing and connector orientation before installation, especially on Mercedes-Benz CL500, S420, S500, SL500, E420, and E500 applications. Inspect adjoining breather hoses for cracks, swelling, or oil saturation before reassembly. Confirm the inlet and outlet diameters match the existing system and ensure all connections seat fully to prevent leaks.

Quality Assurance

URO backs this replacement connector with a 24-month unlimited mileage warranty. The part is made from high-quality materials selected for long service life in engine-bay use.