One problem related to engine has been reported for the 2006 Audi A3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Audi A3 based on all problems reported for the 2006 A3.
2006 Audi A3 with 20t engine. Malfinction indicator lamp illuminated and car did not want to excellerate and went into limp mode. Took it to the Audi dealer where I purchased the vehicle new in 2005 and their analysis indicated a bad intake camshaft, bad high pressure fuel pump along with bad cam fallower. Quoted work was $1000 labor and $950 in parts.