The incident left him with more than 30 broken bones.
In a clip from an upcoming interview, Jeremy Renner: The Diane Sawyer Interview – A Story of Terror, Survival and Triumph, the actor breaks down in tears as he describes lying in hospital.
“So I’m writing down notes on my phone [which are the] last words to my family,” he said, speaking to Sawyer whilst sitting in a wheelchair.
Last week, another clip saw Renner reveal that he was “awake through every moment” of the ordeal.
But he said he would “do it again” as the plough was heading straight towards his nephew Alexander Fries, whose car Renner was trying to free from the snow.
Renner appeared emotional again when Sawyer mentioned he had said “I’m sorry” to his family in sign language.
The interview will feature a recording of the 911 call made in the aftermath of the incident, in which Renner’s nephew thought he was dead.
Throughout his recovery Renner updated fans via social media, from an Instagram post days after the accident when he was “too messed up” to type to a recent workout video showing his rehabilitation exercises.