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O.E.M. Crankcase Breather Hose - 4008346

O.E.M. Crankcase Breather Hose 4008346

O.E.M.
Availability:
Out of stock
SKU 4008346
Sold out
$297.93 - $297.93
$297.93
$297.93 - $297.93
$297.93
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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O.E.M.

Crankcase Breather Hose

This product also goes by these part numbers: 06E 103 207 AP, 06E103207AP, 4008346

This part also goes by the following cross reference.

Cross Reference Part Number: 06E103207AP

Fits These Vehicles 8 applications
Audi
Make Model Engine Years
Audi Q5 3.0V6 2013–2017
Audi S5 3.0V6 2010–2016
Audi S4 3.0V6 2010–2016
Audi Q7 3.0V6 2013–2015
Audi A8 Quattro 3.0V6 2013–2014
Audi A7 Quattro 3.0V6 2012–2014
Audi A6 Quattro 3.0V6 2009–2014
Audi S5 4.2V8 2010–2012

Fitment data last updated: 2026-06-30

Fits 8 vehicle applications Check vehicle fitment before ordering View fitment

About this Crankcase Ventilation (PCV)

The O.E.M. 4008346 is part of the crankcase ventilation (PCV) system, which routes gases that escape past the pistons back into the intake to be burned, and separates oil out of them. When the system fails, crankcase pressure and oil consumption can rise quickly.

Frequently asked questions

What does the crankcase ventilation system do?

It relieves pressure inside the engine by drawing blow-by gases back into the intake, while an oil separator or valve keeps oil out of the intake. Correct crankcase pressure protects seals and gaskets.

What are the signs of a failed PCV valve or oil separator?

A whistling or howling noise at idle, rough idle, lean-running fault codes, higher oil consumption, oil leaks from seals, blue smoke, or suction at the oil filler cap strong enough to hold the cap down.

What should I replace along with it?

Crankcase vent hoses become brittle with heat and age, so inspect and replace cracked hoses and fittings at the same time. On many European engines, the valve cover and separator are serviced together.

Can I replace PCV components myself?

Many parts are accessible with basic tools, though some separators sit under the intake manifold. Handle old plastic fittings carefully, as they can break during removal.

How do I make sure this crankcase ventilation part fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

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