Taranaki ran in five tries to beat Auckland 39-11 at Yarrow Stadium in New Plymouth on Sunday.
Auckland slumped to their third defeat in four matches in an error ridden performance.
Auckland have enjoyed little success against the men from New Plymouth in recent years, and that hoodoo continued as Taranaki recorded their highest ever winning margin against the Aucklanders to post their third victory of the season.
Leading 6-3 at the break following an uninspiring first half, Taranaki sparked into life in the second stanza, scoring four quickfire tries in the space of 12 minutes to stun the visitors.
All Black Isaia Toeava made his return to action after missing 14 weeks through a recurrent hip injury and got through 40 minutes of work, but he could do little to ignite a misfiring Auckland backline who took 78 minutes to find the try line.
Instead it was the young Taranaki trio of Jackson Ormond, Kurt Baker and Jason Hayward who ran riot against the much fancied Auckland backline boasting three All Blacks.
In perfect conditions Auckland were once again guilty of making far too many unforced errors, dropping simple passes and falling off tackles with alarming frequency.
They did have their chances and got themselves into prime attacking opportunities, but they were unable to capitalise on their opportunities as mistakes squandered their hard graft.
The small but boisterous crowd at Yarrow Stadium had to wait 43 minutes to witness the first try as Taranaki flanker Scott Waldrom jinked past Alby Mathewson close to the ruck and beat two further defenders on his way to the try line.
But from there the floodgates opened as the home side ran in three further tries in the space of 12 minutes.
Halfback Tyson Keats ghosted through a gaping hole in the Auckland defensive line from a lineout to dot down, before Kurt Baker finished off a long range try to ease the home side out to a 27-6 lead.
And just moments later Jayden Hayward intercepted a Toby Morland pass to race away and dive over under the posts to collect Taranaki's four try bonus point.
Auckland finally managed to strike back with two minutes on the clock as Brent Ward, who had a busy game, crashed over the whitewash.
But Taranaki ensured they would have the final say, replacement Mohonri Schwalger responding with a try on full-time to post Taranaki's biggest ever winning margin against Auckland.
Tries: Waldrom, Keats, Baker, Hayward, Schwalger
Cons: Barrett 4
b>Pens: Barrett 2
Pens: Anscombe 2
Taranaki: 15 Kurt Baker, 14 Andre Taylor, 13 George Pisi, 12 Jayden Hayward, 11 Jackson Ormond, 10 Beauden Barrett, 9 Tyson Keats, 8 Ben Souness, 7 Scott Waldrom, 6 Chris Walker, 5 Craig Clarke (c), 4 James Broadhurst, 3 Shane Cleaver, 2 Laurence Corlett, 1 Michael Bent.
Replacements: 16 Mahonri Schwalger, 17 Carl Carmichael, 18 Jason Eaton, 19 Blade Thomson, 20 Brett Goodin, 21 Jack Cameron, 22 Isaia Tuifua, 23 Willie Ioane.
Auckland: 15 Brent Ward, 14 Joe Rokocoko, 13 Hadleigh Parkes, 12 Francis Saili, 11 Charles Piutau, 10 Gareth Anscombe, 9 Alby Mathewson, 8 Peter Saili, 7 Sean Polwart, 6 Nathan Hughes, 5 Chris Lowrey, 4 Steve Luatua, 3 Charlie Faumuina, 2 Tom McCartney (c), 1 Tevita Mailau.
Replacements: 16 Ash Dixon, 17 Pauliasi Manu, 18 Richard Haddon, 19 Onosai'i Auva'a, 20 Toby Morland, 21 Piers Francis, 22 Isaia Toeava, 23 Angus Ta'avao.
Referee: Chris Pollock