While trying to exit the vehicle, Ortiz-Magro reportedly "got caught" in his seatbelt.
Harley and Ortiz-Magro's daughter, 2-month-old Ariana Sky, is said to have been in the auto when the accident went down. It's unclear what time she was released.
"Jen hit Ronnie in the face during the argument, and he asked [her to] pull over and let him out of the auto", the source said.
Something tells us that Ronnie Ortiz-Magro and Jen Harley are never getting back together. Harley allegedly started driving while he was stuck and dragged him.
Jen was reportedly "driving erratically" during the ride home, leaving three out of four of the vehicle tires flat.
The couple's relationship has been tumultuous, to say the least, throughout much of the first season of Jersey Shore: Family Reunion as well as after Ariana's birth.
Earlier this month, Harley punched and spit on Ortiz-Magro during an argument at Planet Hollywood in Las Vegas and called the cops on him but fled the scene.
The 32-year-old reality star is now shooting season two of Jersey Shore: Family Vacation in Las Vegas. We're told friends are also advising him to handle the custody situation in court, because there's no upside to reconciling with Jen at this point.
They fought again on June 7 when Ortiz-Magro went to Las Vegas to shoot the show.