2012 Audi A4 Quattro Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2012 Audi A4 Quattro
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2012 Audi A4 Quattro 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.