06A129101D / 034129101B Crankcase Ventilation Valve for VW Audi 1.8T
06A129101D and 034129101B are OEM reference numbers for a crankcase ventilation valve used in selected Volkswagen, Audi, Seat and Skoda 1.8T applications. The product page also lists related reference numbers 06A129101A and 06A129101N.
OEM / Reference Numbers
- 06A129101D
- 034129101B
- 06A129101A
- 06A129101N
Part Type
- Crankcase ventilation valve
- PCV valve
- Crankcase breather valve
- Engine ventilation valve
What This Part Does
The crankcase ventilation valve is responsible for controlling pressure and airflow inside the engine ventilation system. In turbocharged 1.8T applications, proper crankcase ventilation is important for stable idle, correct airflow behavior and consistent engine operation.
Compatible Vehicles
- VW Passat 2003–2005 1.8 Turbo
- VW Jetta 2002–2005 1.8 Turbo
- VW Bora 2002–2005 1.8 Turbo
- VW Golf 2002–2006 1.8 Turbo
- Audi A4 1999–2008 1.8 Turbo
- Audi A6 1998–2005 1.8 Turbo
- Audi TT 2003–2006 1.8 Turbo
- Seat Leon 2002–2006 1.8 Turbo
- Seat Toledo 2002–2004 1.8 Turbo
- Skoda Octavia 2001–2011 1.8 Turbo
- Skoda Superb 2002–2008 1.8
Brand Compatibility
- Audi
- Volkswagen
- Seat
- Skoda
Engine Family
- 1.8 Turbo / 1.8T
Common Symptoms of a Faulty Crankcase Ventilation Valve
- Unstable or rough idle
- Ventilation-related running issues
- Incorrect crankcase pressure regulation
- Airflow imbalance in the PCV system
- General 1.8T crankcase ventilation problems
Why Choose This Replacement
- Targets exact OEM search intent for 06A129101D and 034129101B
- Suitable for a wide range of VW, Audi, Seat and Skoda 1.8T applications
- Supports repair of the crankcase ventilation / PCV system
- Useful for restoring correct crankcase pressure control
- Cost-effective replacement for failed ventilation valve units
Important Before Ordering
Please compare your original part number with 06A129101D or 034129101B before ordering. If your original valve carries 06A129101A or 06A129101N, verify compatibility by vehicle model, production year and engine application before purchase.
FAQ
What does 06A129101D fit?
It fits selected 1.8 Turbo applications including VW Passat, Jetta, Bora, Golf, Audi A4, Audi A6, Audi TT, Seat Leon, Seat Toledo, Skoda Octavia and Skoda Superb models listed on the page.
Is 034129101B the same type of part as 06A129101D?
Yes. This page presents 06A129101D and 034129101B as the main OEM reference numbers for the same crankcase ventilation valve type.
Are 06A129101A and 06A129101N related reference numbers?
Yes. The product page lists 06A129101A and 06A129101N as additional reference numbers associated with this crankcase ventilation valve.
What does a crankcase ventilation valve do?
The crankcase ventilation valve helps regulate engine ventilation flow and internal crankcase pressure. In 1.8T applications, it supports stable operation of the PCV / breather system.
Which brands is this valve suitable for?
The product page lists compatibility with Audi, Volkswagen, Seat and Skoda vehicles.
How do I confirm compatibility before ordering?
Compare your original part number with 06A129101D or 034129101B first, then verify vehicle model, production year and 1.8T engine application. If your valve uses 06A129101A or 06A129101N, compatibility should also be checked before purchase.
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