European champion Bayern Munich took a significant step toward retaining the Bundesliga title with its first win at rival Borussia Dortmund in four years.

Former Dortmund hero Mario Goetze came off the bench and produced a super shot to give Bayern the lead on 66 minutes before Arjen Robben and Thomas Mueller added to the 3-0 rout in the final five minutes of Saturday's German 'Clasico'.

It was Bayern's first Bundesliga win over Dortmund in seven attempts and extended Munich's record unbeaten run in the German league to 38 matches in a repeat of May's Champions League final.