Police were patrolling the Berkeley area about 3am and saw a Toyota Hilux at a service station on Northcliffe Drive.

Police immediately recognised the woman who was sitting in the driver's seat.

The woman allegedly made up a reason why she was in the area and police searched her.

They found 10 small, sealed, coloured plastic bags, all containing a white powder.

The woman was placed under arrest and taken to Lake Illawarra police station.