Several MyCiti buses have been gutted around the city in the past few weeks.
This comes amid the company's decision to axe more than 80 of its drivers following a six-week unprotected strike.
The drivers had been demanding that they be in-sourced by the city. Currently, the city uses contractors to employ drivers to operate its fleet of buses.
Another MyCiti bus driver was forced to flee for his life in November after three "passengers" boarded, threw petrol inside the bus and set the vehicle alight.
TimesLIVE reported that the bus was en route from Cape Town to Omuramba station in Milnerton.
At the time, the city’s law enforcement director Robbie Roberts said: "The bus caught fire and the suspects ran away. The driver also jumped out of the bus."
One of the fleeing suspects was identified by the community and security, and was promptly arrested.