Modeste scored a last-gasp goal deep, deep
 into stoppage time to rescue a point for his side on Saturday.
He headed home at the back post after Nico Schlotterbeck brilliantly kept the ball alive before crossing a delightful pass.
The Signal Iduna Park erupted after the ball hit the back of the net and sparked wild scenes on the pitch.
Bayern chief Oliver Kahn couldn't believe Dortmund's equaliser as he cut a frustrated figure in the stands.
Leon Goretzka had opened the scoring in the 33rd minute, with Leroy Sane doubling his side's advantage in the second-half