She began in the industry 6.5years ago by helping out her husband who had just opened his own workshop.
"I started knowing nothing about cars and didn't really have an interest ... now I can do everything," she said.
Mr Haer said his wife first helped him in the office but he then started asking if she could pass him different tools and it developed from there.
"It's a big help for me actually, sometimes I have to leave the workshop and she can manage it ... and mechanical repairs she's able to do on her own."
The WOF tester said there were not many women in general in the industry but would encourage more to get involved.
"It's a male dominated industry, maybe women don't like getting their hands dirty," Mrs Kaur said.
"But women can do everything if they want."
Her whole family is very proud of her and hope this will inspire other women, her husband said.
"She's very particular. It's a very responsible trade, you have a responsibility to put a good vehicle back on the road," Mr Haer said.
"I think women have more of an eye for detail than men ... we could do with more women in the industry."
The couple moved with their two children to New Zealand from Punjab 14 years ago, spending a few months in Auckland before coming to Hastings in search of work.
Mr Haer said it was a tough decision to move away from India but they wanted a better life for their family and definitely found it in Hawke's Bay.
"Hawke's Bay is a very good place to raise children and live in. People are friendly, open and helpful."