Fire teams and police were called to scene, Chao Fa East Rd northbound, near the intersection with Pattana Thongthin Rd, at 7:20am.
They arrived find find the car parked half up onto the footpath, engulfed in flames.
The firefighters took 30 minutes to douse the blaze, but by then the entire interior of the car had been gutted.
Thapakorn Jaibanjert, the 25-year-old owner of the car, told police, “I was driving from my house about one kilometre away when the fire started. I was taking my grandmother to Suan Luang (Rama IX Park) for her morning exercise and taking my niece to school.
“I saw smoke coming out of the air conditioning vents, and then I could flames inside the vents – so I pulled over and got my grandmother and niece out of the car as quickly as I could and got them a safe distance away from the fire,” he said.
People nearby helped to try to put the fire out, but couldn’t, Mr Thapakorn added.
“I have no idea how the fire started. I thought it may have started from the engine, but the engine itself was not damaged by the fire,” he explained.
Officers from the Wichit Fire Station, located with 300 meters from the scene of the incident, confirmed they were still investigating the remains of the car in the hope of identifying what caused the blaze.
The car fire in Wichit came just hours after another car fire in Phuket.
Rescue workers in Rassada were called to the scene of an accident where two vehicles had caught fire in front of Baan Kuku School at about 5am.
The two vehicles, a Bangkok-registered Nissan and a pickup truck registered in Phuket, had both caught fire after a collision.
One of the vehicles had struck a power pole, causing power cables to fall onto the road.
One firefighter at the scene explained, ”It was not easy putting the fire out because power cables had become loose and fell onto the road. We had to wait for the power supply to be switched off before we could start using our fire hoses.’
In all, firefighters had the blaze under control within 20 minutes, he added.