The competition that Leverkusen provides puts Munich under a little more pressure than in previous seasons, they must avoid mistakes like when they were defeated by Mainz to win the title that Leverkusen won last season.
It will impact on Bayern Munich's prepareness in Champions League too. If possible, Bayern Munich will try to create as biggest point difference against Leverkusen and challengers in Bundesliga as possible, as it will help them to focus more on Champions League in knock out phase. With only 4-point difference, Bayern Munich can not get rid of pressure from Leverkusen in Bundesliga.
Four points is a fairly close distance and Munich themselves also know that they must be able to excel even more in the rest of this season so that Leverkusen can no longer catch Munich in the Bundesliga standings. But of course it will not be easy for any team in the rest of this season because in the second half of this season all teams will try to make improvements in order to be able to reduce the distance with each rival and be in a much better position than before. I am also pretty sure that Kompany is feeling a little more pressure at the moment because Munich are still quite close to the rivals who were able to win the Bundesliga last season.
It's small difference and Leverkusen after bad start in this season, gradually come back and after 15 match days, they already returned to a second position. They again are competiting directly with Bayern Munich as a biggest competitor for Bundesliga title. Other clubs like Frankfurt, Leipzig, Mainz began to fall down when the season goes longer.
Bayern Munich and Kompany will have to be very careful with pressure from Leverkusen and if they play badly, Leverkusen will be ready to reduce 4-point difference and even take over the first position.