Esperance fought back from a 3-1 defeat in last week's incident-filled first leg in Alexandria, where controversial VAR decisions clouded the outcome, to lift the continent’s top club prize in convincing fashion.
The Tunisians had struggled to break down a dogged Ahly defence but made better headway as the game progressed, cheered on by a noisy 60,000-strong crowd.
Beguir scored with virtually the last touch of the first period, slipping the ball home after being teed up by a cut back from the left by Taha Yassine Khenissi.
The 24-year-old midfielder then got the all-important second goal as he rose to head home Mohamed Ali Yaccoubi’s cross in the 53rd minute before going off minutes later with a knee injury.
The second goal prompted a switch in tactics from both sides as Ahly switched to attack and Esperance immediately made changes to bolster their defence to hold onto their advantage.
But Esperance caught Ahly on the counter attack with Anice Badri adding a third in the 86th minute with his eight goal of this year’s competition.
The match had a tense build-up after the first leg in which the referee handed Ahly two questionable penalties and there were accusations of violence by the players of both clubs on the pitch and in the tunnel after the match.