A woman crawled several hundred metres up a steep bank for help after her car careered off the road near Warkworth.
After plunging down the bank at Pohuehue, the injured woman managed to get out of her car and seek help.
An Auckland Westpac Rescue Helicopter spokesman said one of their helicopters was sent to the scene about 5.10pm yesterday.
The woman, in her 50s, told rescuers she had veered off the road and despite trying to brake, had continued down the bank for several hundred metres before crashing into a stand of trees.