PCV Valve Diaphragm for Valve Covers and Oil Separators
This universal PCV valve diaphragm is designed for repairing crankcase ventilation components in valve covers and oil separators across BMW, VAG, Peugeot, Citroen, Ford, Volvo and other platforms. It replaces a torn, hardened or worn membrane inside the existing PCV valve or oil separator unit.
This product is supplied as a diaphragm only. It is not a complete valve cover, complete PCV valve or full oil separator assembly.
OEM / Reference Numbers
Primary OEM number:
- No exact OEM number is specified for this universal diaphragm.
Product reference:
- SKU: PCV001
Part Type
- PCV valve diaphragm
- universal PCV membrane
- valve cover diaphragm
- oil separator membrane
- crankcase ventilation diaphragm
- engine breather membrane
What This Part Does
The PCV diaphragm helps regulate crankcase pressure and controls blow-by gas flow through the crankcase ventilation system. When the original diaphragm tears or stiffens, the system can lose pressure control and cause oil consumption, oil leaks, rough idle or crankcase ventilation faults.
Replacing the failed diaphragm helps restore pressure control in the existing valve cover or oil separator unit when the housing is still usable.
Compatible Vehicles
This universal PCV valve diaphragm is listed for multiple vehicle platforms and should be selected by matching the original diaphragm diameter and design.
- BMW
- VAG: Audi, Volkswagen, Skoda, Seat
- Peugeot
- Citroen
- Ford
- Volvo
- Other applications using a compatible PCV diaphragm design
Engine / Engine Family / Technical Detail
- Universal application by diameter and design
- Available in multiple diaphragm diameters
- Measure the original membrane before ordering
Common Symptoms of Failure
- oil consumption
- crankcase pressure faults
- oil leaks
- rough or unstable idle
- vacuum leak symptoms
- whistling noise from the PCV area
- oil vapor issues in the intake system
Why Choose This Replacement
- Universal repair option for valve covers and oil separators
- Suitable for multiple platforms when diameter and design match
- Cost-effective alternative to replacing the complete PCV valve, oil separator or valve cover when only the diaphragm has failed
- Supports targeted repair of the existing crankcase ventilation component
- Price is per one diaphragm piece
Important Before Ordering
- Measure the diameter of your original diaphragm before ordering.
- Compare the shape, edge design and installation style with your original membrane.
- This product is a universal PCV diaphragm only, not a complete assembly.
- Compatibility is confirmed by dimensions and design, not by exact OEM number.
- Check your valve cover or oil separator construction before purchase.
FAQ
What does this universal PCV valve diaphragm fit?
This diaphragm is listed for valve covers and oil separators on BMW, VAG, Peugeot, Citroen, Ford, Volvo and other applications where the diameter and membrane design match the original part.
Does this universal diaphragm have an OEM number?
No exact OEM number is specified for this universal diaphragm. Compatibility should be confirmed by measuring the original diaphragm and comparing the design.
What does a PCV valve diaphragm do?
The diaphragm helps regulate crankcase pressure and controls blow-by gas flow through the crankcase ventilation system.
What symptoms indicate PCV diaphragm failure?
Common symptoms include oil consumption, oil leaks, crankcase pressure faults, rough idle, whistling noise, vacuum leak symptoms and oil vapor issues.
Is this a complete PCV valve or oil separator?
No. This product is the diaphragm only. It is not a complete PCV valve, complete oil separator or valve cover assembly.
How do I confirm compatibility before ordering?
Measure your original diaphragm, compare the shape and sealing edge, and confirm that your valve cover or oil separator uses the same membrane design.
Read All
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