It's built into the hazard light switch.
The hazard light button will slide out, with the relay (small box) attached.
Dealer's parts department.
It could be the indercator switch i just had the same fault on a Hyundai and it was the indercator switch
above the drivers feet, you must remove the casing and the relay panel is to the left.
The 2010 Audi A3 has 16 valves.
The 2013 Audi A3 has 16 valves.
The 2012 Audi A3 has 16 valves.
The 2009 Audi A3 has 16 valves.
The 2007 Audi A3 has 16 valves.
The 2008 Audi A3 has 16 valves.
The 2006 Audi A3 has 16 valves.
The 2011 Audi A3 has 16 valves.
behind the hazard button, its built as complete assembly for Turn/hazard signal