Following Wednesday's Heroes Association rout by Villarreal, the Bundesliga pioneers again neglected to persuade against a side only seven focuses over the assignment end of the season games.
Lewandowski's 23rd objective in 19 games against them got the success after Reece Oxford's handball.
The Bavarians presently sit nine focuses clear of Borussia Dortmund at the top.
A disappointing first half saw Bayern battle to track down any cadence against a hearty Augsburg protection. Lewandowski was left segregated in assault, while neither Leroy Rational nor Serge Gnabry could make advances from wide positions.
For the entirety of the house side's belonging, Augsburg looked a danger on the counter-assault and went close through Ruben Vargas 10 minutes before half-time.
It was a lot of a similar story in the final part, Bayern's play arduous and chances an extraordinariness. Julian Nagelsmann sent on Jamal Musiala, however they actually battled to track down their edge.
With eight minutes staying, the hosts were granted a punishment after the video aide official considered that previous West Ham protector Oxford had taken care of the ball nearby. Lewandowski scored to grab each of the three places, causing Nagelsmann a deep sense of's help.