034Motorsport Reinforced Silicone Crankcase Breather Hose for Volkswagen Golf and Jetta (2004–2006)

The 034Motorsport 034-101-3039 is a reinforced silicone crankcase breather hose that connects the lower block breather hose to the small nipple on the valve cover breather port of the Mk4 Volkswagen Golf and Jetta 1.8T. It replaces Volkswagen part 06A 103 213 BB. That factory hose is thin plastic, and it falls apart over time, letting unmetered air into the intake. The stock plastic part also clogs easily with sludge. 034Motorsport makes this replacement from reinforced silicone in place of the factory plastic, and it is made in the United States.

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

A crankcase breather hose is part of the positive crankcase ventilation system. It carries pressurized crankcase air and oil vapor away from the engine so the vapor can be separated and the air burned in the intake. That steady mix of heat, pressure, and oil vapor is why breather hoses are a common failure point. This hose covers one specific run on the 1.8T: block breather to valve cover port. It is sold individually, priced each, and comes in black only. Hose clamps come in the box, so no separate clamp order is needed for the swap.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-101-3039
• Replaces Volkswagen part number: 06A 103 213 BB
• Material: reinforced silicone
• Routing: lower block breather hose to the small nipple on the valve cover breather port
• Color: black only
• Includes: hose clamps
• Sold as: one hose, priced each
• Made in the United States
• Warranty: 24 months

Common Questions

Why replace the factory plastic hose?
The stock 06A 103 213 BB hose is thin plastic that breaks down with age and causes intake leaks. It also clogs easily with sludge.

What signs point to a failed breather hose?
A cracked or broken breather hose lets in unmetered air. That can trigger a check engine light for an intake leak or airflow fault, cause rough running or a misfire, and leave oil residue on the hose and the parts around it.

Do I need to buy clamps separately?
No. Hose clamps are included with the hose.

PMB sells 034Motorsport crankcase ventilation hoses for Volkswagen owners replacing failed factory plastic.

Fitment & Compatibility

Check the fitment table below to confirm this hose fits your car. Make sure your engine is the 1.8T with the valve cover breather port this hose connects to. Send us your VIN and PMB will confirm fit before you order.