The Spanish phrase "legalizar carros a Mexico" in English has an approximate meaning of "to legalize cars to Mexico." The phrase is visible in several Spanish-language online articles concerning how to import vehicles into Mexico.
In addition to "make legal," the Spanish verb "legalizar" can also mean "authenticate," particularly when dealing with legal documents. The official Spanish word for "car" is "automovil," but the usage of "carro" is common in Central American dialects. Articles concerning legalizing cars for import into Mexico discuss the type of cars that Mexican customs allows into the country, as well as the necessary forms and documents that the importer needs to fill out.