How to Replace the Audi A4 Ignition Coil

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The ignition coils on your Audi A4 are what provide the spark to the spark plugs, which sit underneath each coil. Every cylinder in your A4's engine has a spark plug and an ignition coil assigned to it. Sometimes, the ignition coils can fail and require replacement. Typical symptoms of a failed ignition coil include a flashing "Check engine" light, a rough idle or hesitant acceleration. Replacing the ignition coils on your A4 is a quick procedure that takes just a few minutes.

Things You'll Need

  • Flathead screwdriver
  • Park your Audi A4 on a level surface and open the hood.

  • Remove the plastic rivets that secure the plastic engine cover to your engine with the flathead screwdriver. Depending on your engine, there may be either three or four plastic rivets, which are all very obviously placed. Set the engine cover aside.

  • Firmly pull the ignition coil you need to replace up from the engine. Since it does attach to the spark plug, you will need to apply a little force. Be sure to pull directly up so that you do not bend the metal rods at the bottom of the ignition coil.

  • Unplug the ignition coil from its wiring harness. Depending on your engine, you may need to use a flathead screwdriver to pry up the loosening latch on the wiring harness.

  • Insert the replacement ignition coil into the spark plug cylinder and push directly down until you hear a slight popping noise, which will indicate that it has been installed correctly.

  • Replace the plastic engine cover and secure it with the flathead screwdriver and the plastic rivets to complete the procedure.

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References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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