The Swedish star, who is set to depart St Andrews in the summer on a Bosman free transfer having failed to agree a contract extension, was on target for the third time in four games in Sunday's 1-1 home derby draw against fellow strugglers Wolves.
The draw for the 10-man Blues maintained their four-point lead above the drop zone on 39 points with just three games remaining. And Larsson is very hopeful they can push on and get the required points in those matches.
"We're not thinking that way, that we're safe," he told the Birmingham Post.
"But I am extremely confident about what we are going to do for the rest of the season and that we will get the points we still need. I don't think we're going to go down.
"But we can't count ourselves safe, not at all. We're not going to be relaxed, we're going to keep going and work hard to pick up the points we need.
"We've got a bit of a lead, there are a few teams below us, and only three games left now.
"We hoped we would have beaten Wolves and that would have been it.
"But it's one game less, we've picked up another point and we should be fine if we keep working hard, we shouldn't be in any trouble."