Aguero opened the scoring in the first half - thanks to a remarkable 70-yard assist from Ederson - before adding two goals after the break to complete his 13th career hat-trick and ninth in the Premier League.
The reigning champions were in irresistible form at the Etihad in our opening home game of what would prove a remarkable 2018/19 campaign.
The Terriers did manage to hold City at bay for 25 minutes but were undone when goalkeeper Ederson picked out Aguero with a stunning pinpoint pass and the striker drew out Ben Hamer before lifting the ball into the net.
Gabriel Jesus added a second seven minutes later with a crisp low strike before Aguero pounced on a Hamer error to stab in his second.
Jon Gorenc Stankovic gave the visitors the slightest glimmer of hope before half-time when he poked in from Steve Mounie's flick-on, but any optimism was snuffed out early in the second half by a brilliant free-kick from David Silva.
Aguero wrapped up his hat-trick with a smart flick from Benjamin Mendy's cross - before a Terence Kongolo own goal sealed an emphatic win for an impressive City.
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