One problem related to ignition has been reported for the 2007 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Audi A4 based on all problems reported for the 2007 A4.
After a stop light changed to green I started a left turn. Immediately the car started to "shake". It seemed like I was driving over some lane divider bumps. I noticed the engine light was on so I found a safe place to pull over. The car had to be towed. The dealership diagnosed a faulty ignition coil. ( all four ignition coils were already replaced in 2010 because of a recall). Again I had all 4 ignition coils replaced. I also had to have spark plugs replaced; (possibly because of the faulty ignition coils ruining some of the plugs. The spark plugs were replaced about 20,000 miles ago. ) I was told by the dealership that the original recall of the ignition coils did not cover this event. I feel there should be another recall for the ignition coils and include spark plug replacements.