Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over...
Audi technical service bulletin 149720330017 for 2009-2012 Audi A6, 2010-2012 Audi Q5 and 2011-2012 Audi Q7 and others.
- Bulletin number
- 149720330017
- Component
- Equipment: other: owners/service/other manual
- Summary
- Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over time, causing a restriction.
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