Gates EMH660 Engine Crankcase Breather Hose

OE-Exact Crankcase Breather Hose

The Gates EMH660 is an OE-exact engine crankcase breather hose for emission control service. Built from durable plastic with a clip-on end and protective sleeve, it is made to restore crankcase ventilation and emission system function on select Audi applications.

For Audi S4 and Audi S5 owners searching for a direct replacement emission control hose, the EMH660 follows the original-style routing and dimensions for a precise service fit. Gates’ Emission Control Hose line focuses on replacement parts that match OE form and function for dependable service life.

• OE Exact grade replacement for crankcase ventilation service
• Plastic construction for application-specific fitment
• Clip-on end type for factory-style connection
• Protective sleeve included for added hose protection
• Inside diameter: 16 mm (.6 in.)
• Centerline length: 1020 mm (40.15 in.)
• Brand line: Gates Emission Control Hose

Detailed Product Overview

The Gates EMH660 crankcase breather hose is engineered as a direct replacement for emission control and crankcase ventilation routing on 2010-2014 Audi S5 and 2012-2016 Audi S4 models, including Apr. & newer S4 applications. If you need an Audi S4 breather hose or an Audi S5 emission control hose that matches OE-style dimensions, this part number EMH660 is built for that service role. It cross-references OE part number 06E103217AD for the same application.

Common Issues This Hose Can Address

• Cracked or brittle crankcase breather hose material
• Loose or damaged clip-on hose connection
• Emission system leaks from worn ventilation routing
• Improper crankcase ventilation flow caused by hose deterioration
• Check-engine concerns related to emission hose failure

Installation Notes and Tips

Verify the hose routing, end style, and centerline length before installation. Inspect adjoining ventilation components, clips, and sealing surfaces for wear or contamination so the replacement hose seats correctly. Confirm vehicle application by model year and note that this part is listed for Audi S4 and Audi S5 emission control service.

Quality Assurance

Gates manufactures this hose as an OE-exact replacement using materials selected for durability and service life. The EMH660 is intended to restore emission system operation to original-style performance on the listed Audi applications.