A slow start to the season had left the seven-times champions trailing the resurgent Blues by three points in the standings but tries from centre Ryan Crotty and prop Owen Franks either side of half-time put their season right back on track.
Full-back Tom Taylor, kicking despite the presence of Dan Carter in the team, added 13 points but the match was won up front with captain Kieran Read and locks Luke Romano and Sam Whitelock leading an outstanding forward effort.
The Blues had their moments and both full-back Charles Piutau and centre Francis Saili came close to scoring tries but the visitors never really got the chance to unleash their dangerous backline in the slippery conditions.
The key moment of the match came just before half-time when Blues lock Culum Retallick was adjudged to have deliberately knocked the ball forward to prevent a try-scoring opportunity out wide and sent to the sin-bin.
Taylor converted the ensuing penalty to send the home side into the break with a 13-3 lead and, with Retallick still kicking his heals on the touchline, the Crusaders pack persisted with the driving maul to send Franks over the line for a try.
A second successful conversion from Taylor followed by his third penalty nine minutes later gave the Crusaders a 23-3 lead with 22 minutes remaining.
The Blues had to throw caution to the wind but they found the Crusaders obdurate in defence with All Blacks winger Zac Guildford and full-back Israel Dagg both making key contributions.
Auckland had started the match brightly but were pegged back by Taylor's first penalty in the 23rd minute and Crotty's try three minutes later.
Blues flyhalf Chris Noakes had an uncharacteristically nervous evening and it was his clearance kick that Crotty charged down and regathered to set the Crusaders on their way to victory.
- Sports & Recreation
- Ryan Crotty
- Owen Franks