XHIMR-FM received its permit late in 1999; with a three-month deadline to come on air, it signed on February 15, 2000 as "Horizonte 108" utilizing content from other IMER stations, particularly XHOF-FM.
In 2005, XHIMR boosted its power to 30 kW from its original 10, while dropping the "108" moniker (which had confused listeners).