Lewandowski finished last season beating club mate Gerd Müller's total record (40) and making 41 hits in the Bundesliga.
Today he made it 5-0 when he pushed the ball in from close range after just over an hour of play.
He has scored seven goals in five games at the start of the season.
Thus, Lewandowski has scored goals in 13 home games in a row, which no one has previously managed in the Bundesliga.
Aiming for the tenth straight league title
Bayern have nine straight series victories and the new coach Julian Nagelsmann wants to expand the suite.
- The goal is of course to win a tenth straight league title.
I am new here and want to pick up where my representatives left, says Nagelsmann according to Reuters.
It was a bit heavier in Bochum.
- It is hard to hear that it is the club's biggest loss.
We fell behind and the cause of the disaster took shape.
We were punished properly today, says Bochum's coach Thomas Reis according to Bayern Munich's website.