Guardiola said league leaders City, who are unbeaten after 12 league matches, must match Huddersfield's desire and he is wary of the threat they pose after being held to a frustrating goalless draw by Wagner's side in the FA Cup last season.
"Complacency will not happen," Guardiola told reporters on Friday. "We played last season against them, we were not able to win there in the FA Cup and it's complicated there.
"What Wagner has done speaks for itself, in the Championship, the Premier League and since. The result against United was a good signal but not just that one.
"They are well-organised, intense, when they defend (they are) so well organised, and with quality. Like every game away it will be tough."
Guardiola praised wide forward Raheem Sterling, who has already equalled his best ever goal tally for a campaign with 11 in 17 appearances this season -- one more than City strikers Gabriel Jesus and Sergio Aguero.
Sterling, whose finishing has often been criticised in the past, scored the winner in Tuesday's 1-0 victory over Feyenoord in the Champions League.
"It's good for him to know that we won certain games because he scored, like (against) Feyenoord. We cannot win the title with just one or two goalscorers," Guardiola said.
City will be without injured defenders John Stones and Benjamin Mendy against Huddersfield this weekend but everyone else is available for selection.
Centre back Nicolas Otamendi returns from suspension and will partner captain Vincent Kompany, who made a successful comeback at Leicester City last weekend after missing two-and-a-half months with a calf injury.
(Reporting by Hardik Vyas in Bengaluru; Editing by Toby Davis)
