Maintain fuel quality to avoid misfires and CEL illumination on Audi A4 Quattro

Fuel quality must be maintained to avoid engine misfire problems; the misfires may cause the Check Engine Light to illuminate.

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Average mileage: 71,592 (71,592–71,592)
Engines affected: 1.8L 4 Cylinder Turbo, 3.0L V6
5 model years affected: 2002, 2003, 2004, 2005, more2006
6 people reported this problem
1 person shared problem details
2003 Audi A4 Quattro- 1.8L 4 Cylinder Turbo71,592
Check engine light was on and vehicle ran rough.
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