Formerly known as "Radio 5", the station developed from a commercial station, LM Radio, which had been operating from Lourenço Marques (now Maputo) in neighbouring Mozambique. Radio 5 first went on the air on October 13, 1975 after Mozambique gained its independence. The station was established with eight medium wave transmitters, catering for the pop music audience. The name indicated the SABC's fifth radio channel at that time.
Re-branded "5FM" in 1992, it has as its current logo a red "5" and superscripted "FM" within a circle and the words "The Power of" inscribed along the upper periphery of the circle. Music is the heart of 5FM's format, supported by news, sports and traffic catering to a wide range of tastes for a youthful market.