Foden converted Kevin De Bruyne’s teasing cross with a composed first-time finish to break the deadlock in the 16th minute on a night where a dominant City side were often frustrated by a spirited performance from the hosts.
Seconds before the opener Brentford had twice come close to scoring themselves.
Ederson produced a fine reflex save to prevent Ruben Dias from diverting Yoane Wissa’s cross into his own net and the Brazilian then stretched out a toe to deny the same player from a shot following a corner.
City were hardly troubled after that and though facing a stubborn Bees’ defence, might have won by more.
Foden and Aymeric Laporte both had headers ruled out for offside by VAR, whilst the goalscorer was also inches away from netting a second when he glanced another brilliant De Bruyne ball just wide and the Belgian then saw a low drive from distance cannon back off the post.
Watch two minutes of highlights in the video above.