A 911 call about a baby locked in a hot car Wednesday afternoon sent emergency workers scrambling to a Queens shopping mall — where they discovered the infant was actually a lifelike doll.

The false alarm marked the second involving a fake baby in the borough since June 18, when cops and medics were fooled into thinking a tiny figure in a Bayside park was a rotting corpse.

Medics who responded to the Metro Mall in Middle Village around 4:15 p.m. Wednesday “were preparing to start CPR but quickly realized it was a doll,” an FDNY source said.

First responders got into the car through a door that was conveniently left unlocked, the source added.

A photo provided by the source shows the doll, which resembles a dark-haired, newborn boy with closed eyes, lying face-up on its back on a stretcher.

Photos shot afterward show the doll was put back in the car, completely covered by a blanket.

A pacifier and a pair of child-size socks and sneakers were left on top of the trunk, along with a blue disposable glove.

The June incident was blamed on a hoax after that doll — found facedown and covered in purple and green skin — was discovered to be wearing a onesie that said “THE CRAWLING DEAD” on its front.