Two Queens cops made a lifesaving grab Friday afternoon when they snagged a troubled teen trying to run headlong into traffic in an apparent suicide bid, police sources said.

Police Officer Aaron Lohman and Sgt. Mateusz Tkaczuk were on anti-crime patrol near 41st Street in Sunnyside at around 2:30 p.m. when they spotted the distraught 17-year-old preparing to dash into bustling Queens Boulevard, sources said.

As concerned passers-by tried to talk the teen out of it, Lohman and Tkaczuk rushed over, stopped traffic and grabbed him before he was harmed, sources said.