034Motorsport Silicone Crankcase Breather F-Hose for Audi A6 Quattro (2000–2004) and S4 (2000–2002) 2.7T

034Motorsport's silicone F-hose is a crankcase breather hose that replaces the factory F-hose on 2.7T twin-turbo engines in the Audi A6 Quattro and S4. It is a direct fit on 2.7T engines with a factory F-hose and replaces the failure-prone factory part, number 078133784AJ. The hose is reinforced silicone and comes with new stainless steel hose clamps. It is made in the United States.

034MOTORSPORT parts carry a 24-month warranty.

A crankcase breather hose carries pressurized air from the crankcase to the PCV valve, where oil vapor is separated and the air is sent to the intake to be burned. Heat, pressure, and oil vapor break down plastic and rubber hoses over time, which is why the factory F-hose is a common failure item. This single hose is the right choice when the F-hose is the only failed piece in the breather system. 034Motorsport, founded by Javad Shadzi in 2005, designs, tests, and builds its Audi and Volkswagen parts in-house at its Fremont, California, facility.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-101-3051
• Part type: engine crankcase breather hose (F-hose)
• Replaces factory part 078133784AJ
• Material: reinforced silicone
• Includes new stainless steel hose clamps
• Engine: 2.7T with factory F-hose
• Made in the United States
• Warranty: 24 months

Common Questions

How do I know my F-hose has failed?
Look for a split or cracked hose, broken connectors, and oil residue on the hose and engine. The air leak can set a check engine light for an intake leak or airflow fault and, in severe cases, cause a misfire.

Do I need to buy new clamps?
No. New stainless steel hose clamps come with the hose.

Will it fit any engine in these models?
It is made for 2.7T engines with a factory F-hose, so confirm your engine before ordering.

PMB sells this hose as a direct swap for the factory F-hose.

Fitment & Compatibility

Check the fitment table below for your vehicle. Send us your VIN and we will confirm fit.