The Spaniard takes over at Manchester City in the summer having guided Bayern to two of their last three championship wins and, with the Bavarians five points ahead of Dortmund with 10 games remaining, is on course to deliver more success this season.
Bayern, who were beaten by Mainz on Wednesday, would become the first team to win four Bundesliga titles in a row should they finish at the top of the pile come May and Lewandowski believes it would be a "huge story" if his side are crowned champions once again.
The Poland international told Goal: "We are still five points ahead. The most important thing for us is to win the Bundesliga. There is a reason no team has ever won it four times in a row. We want to achieve that, it would be a huge story. To win the title, we have to keep fighting really hard. It's a long way until the end of the season.
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Lewandowski is one in front of Pierre-Emerick Aubameyang at the top of the Bundesliga scoring charts with 23 and, ahead of Saturday's meeting between Dortmund and Bayern, the 27-year-old has maintained that the success of the team remains the priority.
"No [Lewandowski hasn't been thinking about winning the Golden Boot], not at this stage of the season. I have already won it once and I don't have any pressure. Of course I know we still have lots of games to go and I want score as often as possible. If that's enough at the end of the season then that is fine.
"Forty goals in one season? That is very, very difficult. Twenty or 30 years ago it was probably slightly different. Of course the benchmark was high then as well, but 40 goals? Maybe it would be possible if we had 38 games. With 34 it is nearly impossible. Nevertheless, I will try to beat that record [set by Gerd Muller in 1972]."