034Motorsport Silicone Crankcase Breather Hose for Audi A4 and TT and Volkswagen Beetle, Golf, Jetta, and Passat (1997–2006)

This 034Motorsport crankcase breather hose is a reinforced silicone replacement for the factory PCV hose on Audi A4 and TT models and the Volkswagen Beetle, Golf, Jetta, and Passat versions shown in the table below. It carries pressurized crankcase gases from the engine to the air/oil separator, the PCV valve. The factory hose is plastic or rubber, and constant heat, pressure, and oil vapor make it a common failure item in the PCV system. Reinforced silicone gives the hose a material that oil vapor does not break down the way it attacks rubber. 034Motorsport makes this hose in the United States.

034Motorsport parts sold by PMB Performance carry a 24-month warranty.

The hose crosses to factory part number 06A103247. In the PCV system, the separator pulls oil vapor out of the crankcase air and drains it back to the engine, while the cleaned air goes to the intake side for normal combustion. Any crack in this hose lets unmetered air in, which the engine management sees as an intake leak. Brittle factory plastic also tends to break its clips and connectors during removal or while other work is done nearby, so a failed hose often turns up during unrelated service. 034Motorsport, founded by Javad Shadzi in 2005, develops performance parts and tuning for Audi and Volkswagen vehicles.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-101-3038
• Part: engine crankcase breather hose (PCV system)
• Material: reinforced silicone
• Factory reference: 06A103247
• Made in the United States
• Warranty: 24 months

Common Questions

What symptoms point to a failed breather hose?
Look for cracks, splits, or broken connectors, oil residue on the hose and nearby parts, and in severe cases a burnt-oil smell. A large leak can also set an air intake leak check engine light or cause a misfire.

Why would a breather hose cause a misfire?
A cracked hose admits unmetered air, and a severe leak can make the engine run rough and misfire.

PMB Performance sells this hose for Audi and Volkswagen owners chasing PCV leaks.

Fitment & Compatibility

Use the fitment table below to check your model and year. Several of these applications are limited to specific trim levels, so confirm your trim before ordering. Send PMB your VIN and we will confirm fit.