034Motorsport Silicone Crankcase Breather Hose Kit for Audi A4, A4 Quattro (2001–2003), and VW Passat (2000–2002)

This complete silicone breather hose kit from 034Motorsport replaces the factory crankcase ventilation hoses, tubes, and PCV valve on the Audi A4, A4 Quattro, and Volkswagen Passat. It covers six factory parts, so the plastic and rubber pieces that crumble with age come out in one job. The centerpiece is a billet aluminum block breather adapter with an o-ring seal, and it reuses the factory retaining clip. The kit is made in the United States.

034MOTORSPORT parts carry a 24-month warranty.

Here is how the kit lines up with the factory parts it replaces: the valve cover breather hose (06B 103 221P), check valve to intake manifold hose (058 103 221E), T-hose (06A 103 247), block breather tube (06A 103 213F), valve cover breather tube (06B 103 213G), and PCV valve (035 103 245A). The breather system carries pressurized crankcase air to the PCV valve, which separates oil vapor and sends the air into the intake to be burned. Constant heat, pressure, and oil vapor make these hoses a common failure item. 034Motorsport, founded by Javad Shadzi in 2005, builds and tests its Audi and Volkswagen parts in Fremont, California.

Technical Details

• Manufacturer: 034Motorsport
• Part number: 034-101-3002
• Part type: engine crankcase breather hose kit
• Material: silicone hoses
• Billet aluminum block breather adapter with o-ring seal
• Replaces six factory parts, including the PCV valve
• Made in the United States
• Warranty: 24 months

Installation & Tuning Notes

The billet aluminum block breather adapter seals with its o-ring and is held by the factory retaining clip, so keep that clip when the stock block breather tube comes out.

Common Questions

Is the PCV valve part of the kit?
Yes. The kit replaces factory PCV valve 035 103 245A along with the five hoses and tubes around it.

What symptoms point to a failed breather hose?
Common signs are cracked or split hoses, broken connectors, oil residue around the hoses, and a check engine light for an intake air leak. A severe leak can cause rough running and a misfire.

PMB carries this kit for owners replacing the whole breather system at once.

Fitment & Compatibility

Check the fitment table below for your vehicle. We are glad to confirm fit from your VIN.