An out-of-control SUV smashed into a Bronx bus shelter yesterday, seriously injuring a 63-year-old woman, witnesses and officials said.

“[The driver] came barreling down the [Cross Bronx Expressway] off-ramp and just took her out and smacked into the bus stop,” said Didrick Stamoulis, 42.

The victim was pinned under the vehicle in the crash, which occurred around 5:45 a.m. at the BX39 shelter on White Plains Road in the Parkchester area.

She was rushed to Jacobi Hospital, where she was listed in stable condition, police sources said.

The driver, 40, was not charged.