Yes. Examples of the problems include premature wear on breaks, Ignition coil problems, and sludge problems. However, most cars have at least a few issues.
The 2002 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2003 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2005 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2007 Audi A4 has free maintenance for 1 yr./ 5000 mi..
The 2008 Audi A4 has free maintenance for 1 yr./ 5000 mi..
The 2001 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2006 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2010 Audi A4 has free maintenance for 1 yr./ 5000 mi..
The 2004 Audi A4 has free maintenance for 4 yr./ 50000 mi..
The 2011 Audi A4 has free maintenance for 1 yr./ 5000 mi..
The 2014 Audi A4 has free maintenance for 1 yr./ 5000 mi..
The 2012 Audi A4 has free maintenance for 1 yr./ 5000 mi..