Distracted and not paying attention, Bevin Peter Chapman crashed his car into a woman who was locking her car after parking in the main street of Greytown.
The 32-year-old's victim suffered "considerable and permanent injuries" to her back and pelvis which have caused her ongoing problems since the February 27 incident outside the White Swan.
Appearing before Judge Barbara Morris in Masterton District Court on Thursday, Chapman pleaded guilty to one charge of careless driving causing injury.
Duty lawyer Frank Minehan said Chapman was heading north on State Highway 2 when he was "momentarily" distracted by a vehicle approaching from a side street on his right.
He swerved and unfortunately hit the woman and her vehicle, he said.