Pep Guardiola’s side are now assured of finishing runners-up to runaway leaders Liverpool but whether they will qualify for next season’s Champions League remains another matter.
Gabriel Jesus and Bernardo Silva were also on target to help City emphatically end a run of three successive top-flight defeats on the road with a thumping 5-0 victory.
Outclassed Albion repeatedly afforded their dominant visitor’s oceans of space and offered little resistance. The Seagulls remain eight points clear of the relegation zone following a second home defeat in just four days.
Ahead of kick-off in Sussex, there was a poignant minute’s silence following the death of England World Cup winner Jack Charlton at the age of 85.
City became champions for a second successive season on their last visit to the Amex Stadium but almost 14 months on things have turned slightly sour.