Crusaders captain Kieran Read admitted that they failed to maintain their intensity and "took their foot off" after they went ahead by two tries against the Blues.
The Crusaders went into the match looking to make ammends for a disappointing loss in their opening game against the Chiefs.
The Crusaders went ahead early in the match but then allowed the Blues to score 29 unanswered points and rip the result out from under them.
"You've got to keep your foot on the throat when you're up 17-3," said Read.
"The Blues are a quality side and if you give them opportunities they'll take them."
Read said while the Crusaders would look to improve their execution against the Stormers next week, they were not hitting the panic button after failing in their first two games.
"We were in the same position last year, it's important that we rebuild and look towards next week," he said.
Hooker Corey Flynn scored the opening try for the Crusaders after 14 minutes, with Colin Slade adding a second on the 30-minute mark.
Wingers Frank Halai and Tevita Li then hit back for the Blues, notching a try apiece within 90 seconds of each other to change the complexion of the game.
"A few players had individual moments of brilliance and it was awesome to get the momentum... we tried to catch the Crusaders off guard," said Blues fly-half Simon Hickey, who potted six of seven goal attempts on his Super Rugby debut.
George Moala and Jackson Willison continued the onslaught after half-time in front of an ecstatic Eden Park crowd, taking the score out to 32-17.
Ryan Crotty pulled a try back for the Crusaders with nine minutes to go but the lead created by the Blues' potent backline proved too much.