Ranginui climbed over the front passenger and ran from the scene, making "no attempt to check if the other two passengers were injured".
When police found him, a breath test showed he had 554mcg of alcohol in his system. The legal limit is 250mcg.
The passengers were not injured. Ranginui pleaded guilty to driving dangerously, driving with excess breath alcohol, and failing to stop to ascertain injury.
Defence lawyer Stephanie Burlace understood the passengers were Ranginui's sister and cousin. Judge Smith referred the matter to Restorative Justice and remanded Ranginui to July 20 for sentence.