Born in Córdoba, during the reign of his father he commanded the military operations against the neighbouring Christian kingdoms and the Muwallad rebellions.
Al-Mundhir launched an expedition against the Banu Qasi Muwallad family, who had allied with Alfonso III, but was again defeated in 883. The following year he was, however, able to expel the rebel emir Ibn Marwan from Badajoz.
In 886, upon his father's death, he inherited the throne of Córdoba. During the two years of his reign al-Mundhir continued the fight against the rebel Umar ibn Hafsun. He died in 888 at Bobastro, possibly murdered by his brother Abdullah ibn Muhammad al-Umawi, who succeeded him.
Sources
Altamira, Rafael (1999). "Il califfato occidentale". Storia del mondo medievale. Vol. II. pp. 477–515.