'Ice Road Truckers' Lawsuit -- Truck Crash Ruined My Sex Life

"Ice Road Truckers" star Hugh Rowland -- who drives treacherous roads for a living -- was seriously injured in a truck crash in Canada ... so bad his wife says sex is no longer an option.

Hugh claims he was a passenger in a pickup truck ... driven by one of the show's producers.

According to a new lawsuit ... producer Will Morrison was driving recklessly when he lost control, veered off the road, and crashed into trees and bushes.

Rowland -- known as "Polar Bear" on the show -- claims he suffered severe and permanent injuries ... and says he couldn't return to his job at his trucking company.