Julian Nagelsmann's Bayern overlooked a chance to transport 11 factors clear on the top of the table, with second-located Borussia Dortmund's fit at Mainz postponed because of a Covid-19 outbreak within the hosts' squad.
But the Bavarian giants are nevertheless in pole position for a 10th directly league title.
Third-located Leverkusen continue to be four points clear of fifth-positioned Freiburg in the race for a pinnacle-4 finish and Champions League qualification.
It seemed as even though it might be enterprise as ordinary for Bayern when centre-lower back Niklas Suele gave them an 18th-minute lead along with his first Bundesliga intention of the season.
Leverkusen had been talented an equaliser nine mins earlier than half of-time, though, in extraordinary circumstances.
Kerem Demirbay's loose-kick from the proper wing was crusing straight to Bayern goalkeeper Sven Ulreich but Mueller, beneath no stress, stretched full duration to volley the ball into his very own net.
The site visitors twice nearly grabbed a surprise lead before the c language, as Amine Adli struck the submit before Ulreich made an top notch save to disclaim Charles Aranguiz a intention.
Bdominated in the second 1/2 but struggled to create many uncomplicated chances, with Robert Lewandowski passing up the first-rate possibility for a winner when he headed huge 10 mins from time.
Nagelsmann's guys will now flip their attentions to Tuesday and the Champions League last-sixteen 2d leg towards Red Bull Salzburg, with the tie stage at 1-1.
