Various parts of the NUMMI plant were planned to be modified to support Tesla vehicle production. The factory was about 10 times the size Tesla initially needed, and much of the 370-acre (16,000,000 sq ft 1,500,000 m 2) site was unused in 2013, with most activity concentrated in the 5,500,000-square-foot (510,000 m 2) main building that does the final assembly of vehicles. Additionally, Tesla bought a Schuler SMG hydraulic stamping press, worth $50 million new, for $6 million, including shipping costs from Detroit. NUMMI auctioned off the press lines, robots and other equipment to Toyota's other US factories, and Tesla purchased over $17 million of manufacturing equipment and spare parts in 2011, at significant discounts compared to new equipment. The first retail delivery of the Tesla Model S took place during a special event at the Tesla Factory on June 22, 2012. The state of California has supported the renewal, expecting tax income from sustained jobs. Tesla officially took possession of the site on October 19, 2010, and opened it on October 27. The two companies would later end their partnership in 2017. The deal also included a promise that the two companies would partner on the 'development of electric vehicles, parts, and production system and engineering support.' Under the agreement, Tesla would go on to create the electric powertrain for the second-generation Toyota RAV4 EV. As part of the agreement, Toyota would also purchase $50 million of common stock when Tesla held its IPO the next month. On May 20, 2010, Tesla announced that it would purchase most (210 of 370 acres) of the former NUMMI site from Toyota for $42 million. All rail connections were subsequently removed, with the sidings used for more factory facilities. Union Pacific Railroad had tracks running into the plant which had been used during NUMMI-era to carry finished cars. The plant is located in the South Fremont District next to the Mud Slough between the Warm Springs BART station and the California State Route 262 connecting Interstate 880 and Interstate 680. In 2010 the mayor of Fremont viewed the site as dead. Proposals to continue the site after 2010 included Aurica EVs, state incentives to Toyota, and a stadium, but none of them succeeded. NUMMI yearly production peaked at 428,633 vehicles in 2006.

(NUMMI), a joint venture between General Motors and Toyota. Some of the current facilities were operated as the GM Fremont Assembly from 1962 to 1982, and between 19 was used by New United Motor Manufacturing, Inc. Tesla initially also dismissed NUMMI for being too big and costly. However, the cost was prohibitive, and the company looked for alternatives. A separate greenfield factory to be built in San Jose, California was also announced. Construction was supposed to begin in April 2007, but was canceled. Tesla had planned for an assembly factory in Albuquerque, New Mexico, as a central location for shipping. The plant currently manufactures the Model S, Model X, Model 3, and Model Y, employing 22,000 people as of August 2022.

The facility opened as General Motors' Fremont Assembly in 1962, and was later operated by NUMMI, a GM–Toyota joint venture. The Tesla Fremont Factory is an automobile manufacturing plant in Fremont, California, operated by Tesla, Inc.

Oem iron casting foundry factories