The woman, identified as Rahmatia Laipu, from Tawau, succumbed to severe bodily injuries while warded at the hospital at 6.15am, while her companion is still being warded at the Intensive Care Unit.
The duo was said to be heading towards Api-Api Centre from the Putatan area when the accident happened at about 4.30am.
The impact caused them to get trapped in the vehicle and it took seven fire and rescue personnel led by its Operations Chief Ibrahim Matusin, close to an hour to get them out.
According to the woman's father, Laipu, 72, a week prior to the tragedy, ten family members including him and the victim, came all the way from Tawau to visit family members staying in Api-Api Center and Putatan here.
It was learnt that the victim leaves behind a daughter who is in Primary One and a three-year-old son.
The elderly man claimed that he only knew about the fatal accident at about 8am.
"I am shocked to hear that my daughter is no longer alive, she was supposed to follow her sister back to Putatan but I do not why she changed her mind and decided to go to another relative's house in Api-Api Centre," he said, adding that she was his seventh child.
Meanwhile, a 23-year-old man escaped unscathed when the Kancil vehicle he was in overturned near the traffic light junction at Foh Sang in Luyang here, Monday.
It was learnt that the man was heading towards Beverly Hills from the city direction when he lost control of his vehicle as he tried to avoid hitting a vehicle which exited from a junction in the 2am accident.
The impact caused the vehicle to skid and overturn at the divider near the traffic lights.
He was assisted by passersby and traffic police who arrived later.