Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over...
Audi technical service bulletin 01130120330012 for 2009-2011 Audi A4, 2009-2011 Audi A6 and 2009-2012 Audi Q5 and others.
- Bulletin number
- 01130120330012
- Component
- Engine and engine cooling
- Summary
- Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over time, causing a restriction.
Owners of these vehicles have filed 224 complaints in the engine category.
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