كتب : Amro Hassan
In a thrilling tie at BayArena, Leverkusen stunned their visitors by scoring three goals in the space of sixteen minutes.
Tranquillo Barnetta's long-range shot broke the deadlock on 54 minutes, before strikes from Arturo Vidal and Patrick Helmes on 61 and 70 minutes respectively made it three for Leverkusen.
Bayern hit back by scoring twice in two minutes through Lucio and Miroslav Klose.
While Jurgen Klinsmann's men went gung-ho in search of an equalizer, Stefan Kiessling rounded-off a Leverkusen counter attack by scoring a fourth.
In other German Cup games, Werder Bremen beat Wolfsburg 5-2 and Hamburg overcame Wehen 2-1 to reach the semi-final.