Gates EMH345 Engine Crankcase Breather Hose

OE-Exact Emission Hose for Mercedes-Benz

The Gates EMH345 is an OE-exact engine crankcase breather hose built for emission control and crankcase ventilation service. Made from rubber with molded push-in ends, it restores the original hose routing and helps maintain proper vacuum and emission system operation on select Mercedes-Benz models.

Gates Emission Control Hose products focus on direct-fit replacement construction and durable materials for long service life. The EMH345 follows the original hose shape and dimensions for a clean replacement on applications such as Mercedes-Benz C320, E320, ML320, and CLK320.

• OE Exact replacement for factory-style fit and routing
• Rubber construction for durability in emission and vacuum service
• Molded hose design with push-in ends on both sides
• Inside diameter: 4 mm (.14 in)
• Centerline length: 54 mm (2.12 in)
• Compatible with select Mercedes-Benz crankcase ventilation and emission control applications

Detailed Product Overview

Part number EMH345 is an emission control hose used in crankcase ventilation and related vacuum routing. Its OE-exact design helps replace a worn, cracked, or leaking hose while preserving the original connection style between the changeover valve and check valve on supported Mercedes-Benz vehicles. This makes it a practical choice for restoring emission system function on models including Mercedes-Benz C320, E320, and SLK320.

This part cross-references URO 1170780581 for the same application.

Common Problems This Hose Can Address

• Vacuum leaks caused by aged or split rubber hose
• Cracked emission hose connections at the changeover valve or check valve
• Rough idle or drivability issues related to air leakage
• Emission system faults tied to deteriorated crankcase ventilation plumbing
• Loss of proper hose routing after a failed original hose

Installation Notes and Tips

Verify the hose shape, end style, and dimensions before installation. The EMH345 uses push-in ends and a molded profile, so correct routing is important for a secure fit. Inspect nearby vacuum lines, check valves, and connectors for wear before installing the replacement hose.

Quality Assurance

Gates manufactures this hose as an OE-exact replacement using high-quality materials intended for dependable service in emission control applications. Part number EMH345 is built to restore original system operation on the listed Mercedes-Benz fitments.