An SUV slammed into a building in Chelsea on Monday, injuring four people, police said.

The Lincoln Navigator, whose driver works for a car service, mounted the sidewalk and crashed into a T-Mobile store at 17th Street and Sixth Avenue around 2:36 p.m., cops said.

The driver told cops he lost control swerving to avoid someone who cut him off, police said.

The SUV’s front end was smashed as it plowed through one of the store’s windows.

“I think he jumped the curb and went airborne because it was like a bomb. ‘Boom!’ ” said Anna Alarcon, who lives above where the crash happened.

Witness Carmen Rosario added, “I heard a boom, and I came to the front. I saw a lot of smoke, [and] there were people on the ground.”

The Navigator’s roof buckled from the force of the impact, and its airbags deployed.

“Everybody could not move at first — there was a girl that had blood all over her face, then there was the [SUV] driver, who was in shock. He had a beard and was covered in blood,” Alarcon said.

Paramedics took two pedestrians and two passengers to Bellevue Hospital with minor injuries, FDNY said.

The SUV’s driver works for Elite Limo Plus but was not on the clock for the company at the time, according to one of its dispatchers, Mujahid Toor.

The cause is still under investigation, officials said.