079103542B / 079103542E / 079103542D Oil Separator Membrane for Audi 4.0 TFSI
079103542B, 079103542E and 079103542D are OEM reference numbers for an oil separator membrane used in selected Audi 4.0 TFSI applications. The product page also references 07P103464F and specifies a membrane diameter of 68 mm.
OEM / Reference Numbers
- 079103542B
- 079103542E
- 079103542D
- 07P103464F
Part Type
- Oil separator membrane
- Oil separator diaphragm
- PCV membrane
- Crankcase ventilation diaphragm
Technical Detail
- Membrane diameter: 68 mm
What This Part Does
The oil separator membrane is a key part of the separator / PCV system. Its function is to regulate internal pressure and help prevent uncontrolled gas release while supporting stable engine behavior. When the membrane hardens, cracks or tears, the oil separator can no longer work correctly.
Compatible Audi Vehicles
- Audi A6 / Avant 2015–2018 Europe
- Audi A6 / Avant 2016–2018 USA
- Audi A6 / S6 / Avant quattro 2015–2018 Europe
- Audi A6 / S6 / Avant quattro 2016–2018 USA
- Audi A7 Sportback 2015–2018 Europe
- Audi A7 Sportback 2016–2018 USA
- Audi A8 2014–2017 Europe
- Audi A8 / S8 quattro 2014–2017 Europe
- Audi A8 / S8 quattro 2015–2017 USA
- Audi RS6 / RS6 plus / Avant quattro 2013–2018 Europe
- Audi RS7 Sportback 2014–2018 Europe
- Audi RS7 Sportback 2014–2018 USA
Engine
- Audi 4.0 TFSI
Common Symptoms of a Failed Oil Separator Membrane
- Whistling noise from the oil separator area
- Rough or unstable idle
- Vacuum-related running issues
- Loss of membrane elasticity due to mileage and heat cycles
- Cracked or torn diaphragm inside the separator
- Crankcase ventilation system malfunction symptoms
Why Choose This Replacement
- Targets exact OEM search intent for 079103542B, 079103542E and 079103542D
- Designed for selected Audi 4.0 TFSI applications
- Supports repair of the existing oil separator / PCV unit
- Includes a clear 68 mm diaphragm specification
- Cost-effective alternative to replacing the full separator assembly
Important Before Ordering
Please match your original part number with 079103542B, 079103542E or 079103542D before ordering. If your application uses 07P103464F as a related number, confirm separator design, vehicle model and engine compatibility before purchase.
FAQ
What does 079103542B fit?
079103542B is used in selected Audi 4.0 TFSI applications including A6, S6, A7, A8, S8, RS6 and RS7 models within the listed model years.
Are 079103542E and 079103542D the same type of part as 079103542B?
Yes. This page presents 079103542B, 079103542E and 079103542D as core OEM references for the same oil separator membrane type used in Audi 4.0 TFSI applications.
Is 07P103464F a related reference number for this membrane?
Yes. The product page includes 07P103464F as an additional related number associated with this oil separator membrane.
What is the membrane diameter?
The product page specifies a diaphragm diameter of 68 mm.
What symptoms can indicate a failed oil separator membrane?
Common symptoms include whistling noise, rough idle, ventilation-related issues and problems caused by a cracked, hardened or torn membrane inside the oil separator.
How do I confirm compatibility before ordering?
Compare your original part number with 079103542B, 079103542E or 079103542D and then verify Audi model, engine type and separator design. If your reference is 07P103464F, compatibility should also be checked before purchase.
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