"All I remember was a flash of lights. It was a huge bang," Mr Wilson said.
"I still get choked up thinking about it."
Mr Wilson went first to the ute driver, who had miraculously escaped his smashed-in vehicle uninjured.
He then ran to the car, where he found Mr Robinson, of Te Kowhai, slumped in the passenger seat with barely a pulse.
"I told him to stay with me."
The driver, Mr Edwards of Hamilton, had been flung into the back seat and did not survive the impact.
Moments later, Mr Robinson died.
"Having his heart beating and then not is the bit that gets me," Mr Wilson said.
It is understood the pair were not wearing seatbelts.
Mr Wilson and his wife were offered victim support counselling.
He also offered his details to the families of the two men and was relieved when Mr Robinson's fiancee and her parents contacted him to talk.
"That was the biggest thing that helped me get through it. I'm still in touch with the family."
Mr Wilson attended Mr Robinson's funeral. He said that although Mr Edwards' parents had not taken up his offer to talk, it still stood.
Waikato District Council road planning manager Malcolm Brown said the realignment of the road that includes the 65km/h bend where the crash occurred was a work in progress.
He said if the stretch of road was changed, it would be to create a link to the Te Rapa bypass - not to prevent accidents.
"At this stage there's no guarantee it will happen but it's been allowed for," Mr Brown said.
Thirty-four people have died on Waikato roads this year, compared with 31 at the same time last year.
The figure bucks a national trend of decline.
A third of all crashes in the Waikato involve alcohol.
