All lanes of the Auckland Harbour Bridge have reopened after a car fire but motorists were still facing delays.

A Fire and Emergency spokesperson said they were called to a car well involved in fire, on the north bound side of the bridge.

He said crews worked in the outside lanes, at the top of the bridge.

The fire had been extinguished and a tow truck had been called.

Advertisement

A police spokesperson said the northbound 'clip on' lanes were blocked for a time but had since been reopened.

Significant delays are expected and police encourage motorists to avoid the area if at all possible.

Traffic was backed up as far as Mt Wellington but was starting to flow again.