034Motorsport Reinforced Silicone Crankcase Breather Hose for Audi TT Quattro AMU and APX (2000–2002)

Audi TT Quattro owners with the AMU engine, or an early APX engine, can replace the factory rubber crankcase breather hose with the 034Motorsport 034-101-3044, a fully reinforced silicone hose. The factory rubber part is known to crumble and leak. On these turbocharged engines, a leak here can cause boost leaks. 034Motorsport makes this hose from automotive silicone as a direct replacement for factory part number 06A 103 221 AA. It is made in the United States and comes in black only.

This 034Motorsport hose carries a 24-month warranty.

The crankcase breather hose carries pressurized crankcase air to the air/oil separator. There, oil vapor drains back to the engine and the air is fed to the intake. Heat, pressure, and oil vapor break down the factory rubber, which makes this hose a common failure point in the PCV system. The 034Motorsport hose comes with hose clamps, so it goes on without separate hardware. Engine code matters for this part, because 034Motorsport specifies it for the AMU engine and for early APX engines only.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-101-3044
• Replaces factory part number 06A 103 221 AA
• Material: fully reinforced automotive silicone
• Engine codes: AMU and early APX
• Color: black only
• Hose clamps included
• Made in the United States
• Warranty: 24 months

Common Questions

Which TT engines does this hose fit?
It fits the AMU engine and early APX engines. Check the engine code before ordering.

What happens when the factory hose fails?
The rubber crumbles and leaks, which can cause boost leaks. Unmetered air can also set a check engine light, and a severe leak can cause a misfire.

PMB Performance carries this hose alongside other 034Motorsport parts for the Audi TT.

Fitment & Compatibility

Check the fitment table below for the vehicles this hose fits. Confirm that your TT has the AMU engine or an early APX engine. Send us your VIN and we will verify the fit.