Robert Lewandowski scored on the opening day of the Bundesliga for a record seventh consecutive season as the Julian Nagelsmann era began with a draw at Borussia Monchengladbach.
Alassane Plea slammed Gladbach into the lead after he was fed by Lars Stindl.
That was the first time Bayern – who have won the past nine titles – have not scored the first goal of the season since 2012.
Lewandowski equalised with a volley from a Joshua Kimmich corner.
Poland striker Lewandowski and Stindl both went close to scoring a winner in the second half.
Lewandowski has scored in each of his last 11 Bundesliga appearances, with 18 goals in that run. The last time he played a game for Bayern without scoring was February.
Bayern failed to win a game in pre-season under Nagelsmann, who left RB Leipzig for Bayern this summer.