Top of gear box.
To change the brake light switch on an Audi A3, first disconnect the vehicle's battery to ensure safety. Locate the brake light switch, which is typically positioned above the brake pedal. Remove the old switch by disconnecting the wiring harness and unscrewing it from its mount, then install the new switch by reversing the process. Finally, reconnect the battery and test the brake lights to ensure they function correctly.
you go.... and replace it!
The 2011 Audi A3 has 16 valves.
The 2006 Audi A3 has 16 valves.
The 2009 Audi A3 has 16 valves.
The 2010 Audi A3 has 16 valves.
The 2007 Audi A3 has 16 valves.
The 2013 Audi A3 has 16 valves.
The 2008 Audi A3 has 16 valves.
The 2012 Audi A3 has 16 valves.
It could be the indercator switch i just had the same fault on a Hyundai and it was the indercator switch
The 2008 Audi A3 has a 6-speed manual.