A 40-year-old Brooklyn bicyclist was killed after he collided with a BMW driver who didn’t remain on the scene — the third bicyclist to die on the city’s streets in three days, officials said Friday.

Mamadu Diallo was pedaling past the corner of E. 54th St. and Ave. I in Flatlands at 11:50 p.m. Thursday when he was struck by the BMW driver, who was heading east on Ave. I.

Diallo was heading west and was making a left turn onto E. 54th St. when the dark-colored BMW struck him, cops said.

The bicyclist was flung from his bike into a parked Honda CRV, police said. EMS rushed him to Brookdale University Hospital, but he couldn’t be saved.

Diallo lived in Canarise, about a mile from where he was killed.

The BMW driver didn’t remain on scene and remained at large Friday. It wasn’t immediately clear if he knew that he had struck Diallo, cops said.

Cops were canvassing the area for surveillance video to learn where the BMW went after colliding with Diallo.

Diallo was one of three bicyclists to die in motor vehicle crashes within three days.

On Tuesday night, Angelo Camera was killed by a speeding hit-and-run BMW driver who ran a red light at the corner of Bruckner Blvd. and Longwood Ave. in the South Bronx, cops said.

Camera, 51, had just called his wife to say he’d be home in 10 minutes before the fatal crash occurred, she said.

“He was coming home,” Vilmary Martinez, 51, who identified herself as Camera’s wife, told the Daily News. “I called him that night. I told him I needed something, and he said, ‘I’ll be there in 10 minutes, babe.’”

“That was our last conversation,” she said solemnly.

The BMW driver hit two parked unoccupied vehicles — a 2012 Camaro and a 2017 Lexus — before speeding off down the street, cops said. He made it one block further down on Bruckner Blvd. before hitting a 2009 Hyundai Sonata whose driver, a 37-year-old woman, was stopped at a red light at Lafayette Ave., police said.

He then sideswiped a 2019 Volkswagen, and debris from the impact struck a 2005 Chevy Explorer.

The hit-and-run driver then ditched the BMW and appears to have gotten into another car to escape. The driver is still being sought, police said.

“He took my life, my heart,” Martinez said about the BMW driver.

Detectives estimated that the BMW driver was going 100 mph when he slammed into Camera, Martinez was told.

“I want justice. I want (cops) to catch them,” Martinez said. “I want him to go to jail. I want him to pay for what he did.”

Medics rushed Camera and the Hyundai driver to Lincoln Hospital, where the cyclist died. He lived a mile from the crash scene, according to cops. The woman was listed in stable condition.

Medics rushed the woman from the scene near Cypress Hills St. just outside Cypress Hills Cemetery to Brookdale University Hospital but she could not be saved. (Google)A 29-year-old woman riding her bike was killed by a pick-up truck driver who struck her in Brooklyn without stopping early Tuesday, police said. The victim was heading west on Jamaica Ave. in Cypress Hills when she was hit by a white pick-up truck heading in the same direction about 5:50 a.m., cops said (Google Maps)

Earlier on Tuesday, a woman was killed when she was struck by a pick-up truck driver in Brooklyn.

Paulina Tec Choc, 29, was pedaling her bike west on Jamaica Ave. in Cypress Hills when she was hit by a white pick-up truck heading the same direction about 5:50 a.m., cops said.

Medics rushed the woman to Brookdale Medical Center, where she died.

The pick-up truck driver did not remain at the scene.

Diallo is the 17th bicyclist to be killed on city streets this year, according to the bicycling advocacy group Transportation Alternatives.

Following Tuesday’s fatal crashes, transit advocates called on New Yorkers to vote in November on Ballot Question Three, which would expedite the review process for small infrastructure and safe street projects.

“Yesterday, drivers killed two New Yorkers just for daring to bike to or from work. We refuse to look the other way while our neighbors, friends, and family members are killed on dangerous streets,” said Ben Furnas, executive director of Transportation Alternatives. “We need to finally deliver street safety infrastructure before a New Yorker is killed, not after.”