New United Motor Manufacturing, Inc. (NUMMI) was an automobile manufacturing company in Fremont, California, jointly owned by General Motors and Toyota that opened in 1984 and closed in 2010.

After the plant was closed by its owners, the facility was sold to Tesla, Inc. and reopened as a 100% Tesla-owned production facility in October 2010, becoming known as the Tesla Factory.[1]

The plant is located in the East Industrial area of Fremont next to the Mud Slough between Interstate 880 and Interstate 680.

NUMMI yearly production peaked at 428,633 vehicles in 2006.[2]