She said he would be remembered for his sense of humour and his generosity.
"He had a fantastic sense of humour, he's a son, he's a brother, he's a father, he's a grandson, he's a nephew.
"And he's a mate, with an incredible amount of friends. He's a character."
McIntosh said her nephew was "loved by us all".
"And he would be the first person to help anyone out.
"That's why as a family we made the decision to donate his organs. He will be helping a lot of people with his organ donation."
He leaves behind one child.
McIntosh said she had no idea what had transpired before his death other than that he was found gravely wounded in his car at Harold Moody Park on Glendale Rd, Glen Eden.
He was found in a critical condition on Friday morning in the area of area of Harold Moody Park on Glendale Rd, Glen Eden.
Police said they were called to the area about 8.20am Friday.
"Investigators are still in the very early stages of piecing together what has occurred.
"We ask anyone who has any information, or saw something in the area at around the time of the incident that may assist us with our inquiries, to contact police," police said in a statement.
Harold Moody Park is a popular family area for Glen Eden residents.
On Friday, a specialist police photographer was at the scene photographing a white sedan, parked behind a light utility truck, owned by Auckland Council.