REVERE-A car mowed down a pedestrian Tuesday on Bennington Street in Beachmont before the driver fled the scene, police said.The unidentified victim was hit at about 5:45 p.m. in front of Dunkin’ Donuts near the MBTA Blue Line station, according to police.The victim suffered serious, but non-life threatening injuries.The suspect vehicle was described as a dark blue BMW or Audi that sustained heavy front-end and windshield damage and drove toward the East Boston/Winthrop area, police said.Witnesses could not provide a license plate number.As of press time, no arrests had been made.? Dan O’Brien