2011 Audi A4 Repair and Maintenance Costs
A guide to repairs, service, and maintenance costs for your 2011 Audi A4
2011 Audi A4 ProblemsEngine Misfire Due to Failed Ignition Coil, Spark Plug, or Ignition Wire
An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light. Vehicles equipped with spark plug wires may also develop a misfire caused by a failed spark plug wire.
The 2006-2017 Audi A4 uses the 2.0FSI, 2.0TFSI, and 3.2FSI direct injection engines. These engines are subject to carbon buildup in the intake system which can cause power loss, OBD codes and a check engine light, and a rough idle. In normal engines, the engine is cleaned by the gasoline flowing through the injectors and into the intake system, however, the A4 uses direct injection so gasoline does not flow through common carbon buildup areas.
The solution is to remove the intake manifold and professionally clean the intake manifold, intake ports on the cylinder head, and the intake valves. This may need to be done in as few as 20,000 miles.