Australia (17) 34
Tries: Cross, Hynes, Elsom, Horwill Cons: Giteau 4 Pen: Giteau Drop: Giteau
New Zealand (12) 19
Tries: Muliaina, Hore, Ellis Cons: Carter 2
Ryan Cross scored the first of Australia's four tries
Australia extended Robbie Deans' unbeaten start as coach with victory over his native New Zealand in a superb Tri-Nations clash in Sydney.
The Wallabies led 17-12 at half-time with converted tries from Ryan Cross, on his full debut, and Peter Hynes.
The All Blacks replied with scores from Mils Muliaina and Andrew Hore before the interval, and took the lead when Andy Ellis crossed on the resumption.
But Australia hit back with tries from Rocky Elsom, and James Horwill late on.
Victory maintained the Wallabies' unbeaten start to the tournament as they racked up their fifth win in a row overall under Deans, who many New Zealanders felt should have replaced his All Blacks counterpart Graham Henry after the World Cup.
The hosts started strongly in the old Olympic Stadium and were 10-0 to the good within the first 10 minutes.
Giteau landed an early penalty before Cross, starting his first Test in place of injured skipper Stilring Mortlock, had an easy run-in after Lote Tuqiri burst through three tackles, Giteau adding the extras.
It was a great defensive effort from the boys, a real gutsy win
Stand-in Aussie captain George Smith
All Blacks lock Brad Thorn was already off the field by that stage, sin-binned for a high tackle on Giteau.
But the visitors hit back with a try from Muliaina in the 23rd minute, the full-back breaking clear down the right, chipping ahead and then gaining his reward when the ball bounced fortuitously out of Australian hands.
The Wallabies responded with a superb second try of their own, an excellent grubber kick from Adam Ashley-Cooper toed on by Tuqiri, Hynes dotting down and Giteau's conversion making it 17-5.