The second game of the newly expanded tournament proved a walkover in Cincinnati, where Auckland's semi-pro players failed to lay a glove on the Bundesliga giants in the Group C opener, with Jamal Musiala scoring a hat-trick after coming on as a second-half substitute.
On his Bayern debut, Jonathan Tah teed up their sixth-minute opener, heading a deep corner back into the six-yard box, and Kingsley Coman deftly nodded home.
Michael Olise then tucked in after Harry Kane failed to connect with Thomas Muller's centre, before Coman doubled his tally with a drilled finish into the bottom-left corner.
Olise crossed in for Muller to volley in, before the France international curled in a sensational strike on the stroke of half-time.
Kane made way without getting on the scoresheet with an hour played, and after missing a great chance with a close-range header, his replacement Musiala helped himself to a hat-trick.
There was still time for Vincent Kompany's team to reach double figures, as Muller – who will leave the club after the tournament – turned in his 250th Bayern goal.
Data Debrief: History makers
Bayern went into this meeting as the overwhelming favourites, but they made sure they did it in emphatic fashion, which will be particularly pleasing to Kompany. This win marks the greatest margin of victory in the history of the Club World Cup, surpassing Al-Hilal's 6-1 win over Al Jazira in 2021.
In the previous format, Auckland made more Club World Cup appearances (12) than any other team, but they had lost 13 of their 18 matches across those editions, and the gulf in quality between Oceania's best team and one of Europe's elite was fully on show.