We got to play the match on our terms, says Elfsborg coach Björn Hamberg to TV4 Play.
The victory was Elfsborg's third in a row, and the team is now third in a tight table.
Elfsborg dominated the first half, but Västerås started the second half better. During the first quarter of the second half, the visitors created a couple of chances to equalise, but without getting any reward.
Instead, Momoh Kamara was able to extend the home team's lead in the 71st minute and seal the final score six minutes later with a fine long-range shot.
