Wagner progressed through the youth system at Bayern and made his senior debut in 2007, featuring in eight games that season before leaving the Allianz Arena in 2008. He played for several German sides before moving to Hoffenheim last year.

“I’m delighted. A long journey for me is now at an end and I can return to my home, my club. I’m very happy that it’s come off. Bayern are the best club in Germany and one of the best in the world,” Wagner told the club’s website.

The 30-year-old has seven caps for Germany, and was part of the side that won the Confederations Cup earlier this year.

Wagner has previously played for German top-flight sides Werder Bremen and Hertha BSC, along with second-tier MSV Duisburg, Kaiserslautern, and SV Darmstadt 98.

“In Sandro Wagner, we have another Germany international coming to Bayern. We’re convinced that Sandro will enhance our squad with his class and his experience,” Bayern’s sporting director Hasan Salihamidžić said.

Bayern have opened an 11-point lead atop the Bundesliga table and will travel to face Bayer Leverkusen on January 12 following the conclusion of the winter break.