057103772F Valve Cover Diaphragm for Audi VW 4.0 TDI
The 057103772F valve cover diaphragm is a replacement PCV membrane for selected Audi and Volkswagen 4.0 TDI applications. This 51 mm diaphragm 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 existing 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: 057103772F
Related / Reference Numbers: No additional reference numbers are explicitly confirmed for this product.
Part Type
- Valve cover diaphragm
- PCV membrane
- Crankcase ventilation diaphragm
- 4.0 TDI valve cover 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 A8 2018–2024
- Audi A8 / S8 quattro 2018–2024
- Audi Q7 2016–2024
- Audi Q8 2019–2024
- Volkswagen Touareg 2018–2024
Please verify OEM number, vehicle model, production year and valve cover design before ordering.
Engine / Engine Family / Technical Detail
- Engine focus: 4.0 TDI
- Diaphragm diameter: 51 mm
- 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 057103772F
- Supports repair of the existing valve cover ventilation unit
- Cost-effective alternative to replacing the complete valve cover assembly
- Designed for the correct 51 mm membrane repair type
Important Before Ordering
- Verify OEM 057103772F against your original part
- Confirm your 4.0 TDI application and valve cover design
- Check the 51 mm diaphragm size before ordering
- Make sure you need the diaphragm only, not a repair kit or complete valve cover assembly
What does 057103772F fit?
057103772F is listed for Audi A8, A8 / S8 quattro, Q7, Q8 and Volkswagen Touareg 4.0 TDI applications within the specified year ranges.
What does this 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.
What technical detail is listed for this diaphragm?
The diaphragm diameter is 51 mm.
How do I confirm compatibility before ordering?
Match OEM 057103772F with your original part, verify your vehicle model and year, and confirm the valve cover design and 51 mm diaphragm size 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