About 400 competitors, with 320 from Singapore and the rest from the region, had to keep their palm on a Subaru car - the last person standing wins the grand prize.
The 33-year-old engineer from Vietnam had clocked in 77 hours and 58 minutes at Ngee Ann City's Civic Plaza to win the grand prize, after enduring extreme fatigue and sleep deprivation over four days.
Phuoc Huynh also clinched the title of Asian Winner and walked away with additional S$5,000 (RM15,330) cash for his feat.
Participants in the recent MediaCorp Subaru Car Challenge 2015 in Singapore.
First runner-up from Malaysia, Tan Hong Sheng and second runner-up Yip Yu Wai from Singapore, dropped out within three minutes of each other.
Hong Sheng and Yip won cash prizes of S$5,000 (RM15,330) and S$2,000 (RM6,132) respectively.
Presenting the grand prize to a beaming Phuoc Huynh was Tan Chong International Ltd executive director Glenn Tan and MediaCorp chief commercial officer Jack Lim.
“For the first time ever, an overseas contestant has won the Challenge. Phuoc Huynh kept his eyes wide open and outlasted everyone, as a result of his tenacity and perseverance,” said Glenn.
The Malaysia team was awarded the title of Country Team Winner, for achieving the longest combined standing time (accumulated total time of all 10 representatives from the same country) of 518 hours and 45 minutes.
They also won a cash prize of S$10,000 (RM30,605).
In recognition of the efforts by the regional contestants, the title of Country Winner and a cash prize of S$1,000 (RM3,061) went to the last standing representative from each country.
