The Audi Tunnel is a twin-tracked railway tunnel on the Nuremberg–Ingolstadt–Munich high-speed railway just north of Ingolstadt in Bavaria, Germany. It lies just outside Ingolstadt Nord station and passes under part of the Audi car factory site (hence the name) as well as other industrial and residential areas. With a length of 1258 metres (from kilometre post 84.995 to 86.253) it is the second shortest of the new tunnels on this newly built line.