A woman who deliberately drove into her ex-partner and pinned him under the wheel of her car felt rejected because he didn't send her a text message on Christmas Day, a court has heard.

Susan Jane Jongsma, 53, and her boyfriend of two years, had a strained relationship with a history of domestic abuse before she mowed him down on December 25 in 2016.

Jongsma pleaded guilty to causing grievous bodily harm with intent, property damage and assault while she was subject to a domestic violence order in place to protect the victim.

She was jailed for a minimum two years and three months when she faced the NSW District Court on Monday.

The court was told Jongsma had driven to the man's Goulburn home after her phone calls and texts went unanswered, storming inside and berating him for not sending her a Christmas message.