03C103201E / 03C103201D / 03C103201K PCV Oil Separator Membrane for VW Audi Skoda Seat 1.4 1.6
The 03C103201E / 03C103201D / 03C103201K PCV oil separator membrane is a replacement diaphragm for selected Volkswagen, Audi, Skoda and Seat 1.4L and 1.6L applications. It is designed to restore the function of the existing PCV / oil separator unit without replacing the complete assembly.
This product is a membrane / diaphragm only. It is intended for targeted repair of the existing oil separator system and should not be treated as a complete oil separator, complete valve cover or full assembly.
OEM / Reference Numbers
Primary OEM: 03C103201E, 03C103201D, 03C103201K
Related / Reference Numbers:
- 03X103201
Part Type
- PCV membrane
- Oil separator membrane
- Crankcase ventilation diaphragm
- 1.4 / 1.6 VAG PCV diaphragm
What This Part Does
This membrane works inside the crankcase ventilation and oil separation system. When the original diaphragm becomes worn, torn or stiff, the unit may lose its ability to regulate crankcase pressure correctly. Replacing the membrane helps restore PCV function while keeping the original housing in service.
Compatible Vehicles
This product is intended for selected Volkswagen, Audi, Skoda and Seat applications using compatible 1.4L and 1.6L engines and the listed OEM family.
Please verify OEM number, engine code and oil separator design before ordering.
Engine / Engine Family / Technical Detail
- Engine focus: 1.4L and 1.6L VAG applications
- Engine codes: BTS, CNKA, CFNA, CDDA, CLPA, CGGB, BLF
- Part format: membrane / diaphragm only
Common Symptoms of Failure
- Rough idle
- Whistling noise from the PCV / oil separator area
- Vacuum leak symptoms
- Incorrect crankcase pressure regulation
- Increased oil consumption related to a failed breather membrane
- Check engine light caused by air-fuel mixture issues
Why Choose This Replacement
- Targets exact OEM intent for 03C103201E, 03C103201D and 03C103201K
- Supports repair of the existing PCV / oil separator unit
- Cost-effective alternative to replacing the complete assembly
- Suitable for a focused membrane-only repair
Important Before Ordering
- Verify OEM 03C103201E, 03C103201D or 03C103201K against your original part
- Check related reference 03X103201 where applicable
- Confirm your engine code and oil separator design
- Make sure you need the membrane only, not a complete oil separator assembly
What does 03C103201E / 03C103201D / 03C103201K fit?
These OEM numbers are used for selected Volkswagen, Audi, Skoda and Seat 1.4L and 1.6L applications using the matching PCV / oil separator design.
Is 03X103201 the same type of part as 03C103201E?
03X103201 is a related reference number within the same PCV / oil separator membrane application group. Always compare the original part and housing design before ordering.
What does this PCV oil separator membrane do?
It helps regulate crankcase ventilation pressure inside the existing PCV / oil separator unit and supports correct operation of the breather system.
What symptoms can indicate membrane failure?
Common signs can include rough idle, whistling noise, vacuum leak symptoms, incorrect air-fuel mixture, increased oil consumption or check engine light.
Is this a complete oil separator assembly or membrane only?
This product is a membrane / diaphragm only. It is designed to repair the existing PCV oil separator unit rather than replace the complete assembly.
How do I confirm compatibility before ordering?
Match OEM 03C103201E, 03C103201D or 03C103201K with your original part, verify your engine code and confirm the PCV / oil separator housing design.
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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