The A3 Sedan includes a body 11 mm (0.43 in) wider and 9 mm (0.35 in) lower than that of the A3 Sportback. Other features include 16- to 18-inch-wheels (optional 19-inch wheels via quattro GmbH) and electronic stabilization control with electronic differential lock.

The vehicle was unveiled at the 2013 New York Auto Show.

The German model was set to go on sale in late summer 2013. Early models include 1.4 TFSI (140 PS), 1.8 TFSI (180 PS), and 2.0 TDI (150 PS).

Delivery of the UK models began in autumn of 2013. Early models include 1.4 TFSI (140 PS), 1.8 TFSI (180 PS), and 2.0 TDI (150 PS).