03H103429H PCV Valve Cover Diaphragm for Audi VW Skoda 3.6 FSI
The 03H103429H PCV valve cover diaphragm is a replacement membrane for selected Audi, Volkswagen and Skoda 3.6 V6 FSI applications. It is designed to restore the function of the existing valve cover ventilation unit without replacing the complete valve cover assembly.
This product is a diaphragm / membrane only. It is intended to repair the crankcase ventilation system inside the valve cover and should not be treated as a repair kit or a complete valve cover assembly.
OEM / Reference Numbers
Primary OEM: 03H103429H
Related / Reference Numbers:
- 03H103429D
- 03H103429C
- 03H103429L
- 022103515A
Part Type
- PCV valve cover diaphragm
- Valve cover membrane
- Crankcase ventilation diaphragm
- 3.6 FSI PCV membrane
What This Part Does
This diaphragm works inside the crankcase ventilation system integrated into the valve cover. When the original membrane becomes worn, torn or loses flexibility, the PCV system may no longer regulate pressure correctly. Replacing the diaphragm helps restore the function of the existing valve cover ventilation unit in a targeted and cost-effective way.
Compatible Vehicles
- Audi Q7 2010–2013
- Skoda Superb 2008–2013
- Volkswagen CC 2012–2013
- Volkswagen EOS 2009–2011
- Volkswagen Passat 2008–2013
- Volkswagen Passat CC 2009–2012
- Volkswagen Phaeton 2009–2013
- Volkswagen Touareg 2008–2013
Please verify OEM number, vehicle model, production year and valve cover design before ordering.
Engine / Engine Family / Technical Detail
- Engine focus: 3.6 V6 FSI
- OEM focus: 03H103429H
- Part format: diaphragm / membrane only
Common Symptoms of Failure
- Whistling noise from the valve cover area
- PCV-related pressure imbalance
- Oil leak symptoms linked to a failed breather membrane
- Need to repair the existing valve cover ventilation unit instead of replacing the complete assembly
Why Choose This Replacement
- Targets exact OEM search intent for 03H103429H
- Supports repair of the existing valve cover ventilation unit
- Cost-effective alternative to replacing the complete valve cover assembly
- Supports the related OEM family used with the same diaphragm type
Important Before Ordering
- Verify OEM 03H103429H against your original part
- Check related reference numbers where applicable
- Confirm your 3.6 FSI application and valve cover design before ordering
- Make sure you need the diaphragm only, not a repair kit or complete valve cover assembly
What does 03H103429H fit?
03H103429H is listed for Audi Q7, Skoda Superb, Volkswagen CC, EOS, Passat, Passat CC, Phaeton and Touareg with 3.6 V6 FSI applications in the specified year ranges.
Is 03H103429D the same type of part as 03H103429H?
Yes. 03H103429D is a related OEM reference within the same PCV valve cover diaphragm family as 03H103429H.
What does this PCV valve cover diaphragm do?
It helps the crankcase ventilation system regulate pressure inside the valve cover unit. A damaged diaphragm can reduce sealing quality and affect normal PCV operation.
What symptoms can indicate diaphragm failure?
Typical signs can include whistling noise, PCV-related pressure imbalance, oil leak symptoms, or the need to repair the existing valve cover ventilation unit instead of replacing the complete assembly.
Is this a complete valve cover assembly or diaphragm only?
This product is a diaphragm / membrane only. It is intended to repair the existing valve cover ventilation unit rather than replace the complete valve cover assembly.
How do I confirm compatibility before ordering?
Match OEM 03H103429H with your original valve cover, compare any related reference number if needed, and verify your vehicle model, year, engine type and valve cover design before ordering.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings