Whanganui MP Chester Borrows is due to face a trial on a charge of careless use of a motor vehicle causing injury.
Two Trans-Pacific Partnership protesters claim they were struck by his car while he was leaving a protest in his electorate in March last year.
The judge-alone trial starts in Whanganui District Court on Monday.
Deputy Prime Minister Paula Bennett was expected to be called as a witness as she was a passenger in the car at the time.
Borrows has indicated he plans to fight the charge.
Protester and alleged victim Tracy Treadwell said at the time she was left feeling vulnerable and shaken by the incident.
"I was very, very lucky the injuries weren't more severe. I mean you can imagine the horror when I was taking off my shoe, I was horrified at what I was about to find.
"I was fortunate because the car ran over my foot as well as my knee, I was unbelievably fortunate that it was only soft tissue - no fractures."
Borrows said he only become aware of the incident hours afterwards, prompting him to call police to check on the woman's health.
"No I didn't, didn't know anything. But I saw the Facebook post when we were at another appointment later in the day.
"I'm pleased she hasn't got any broken bones. The police told me she has been X-rayed and she hasn't got any broken bones, so I'm very pleased about that."
Ms Bennett declined to comment at the time, saying it was under police investigation.
NZN / Newshub.