We took a tour of the factory where Tesla is building its new Model 3

With the launch of the Model 3, Tesla is on the precipice of a move from ambitious niche upstart to a mass market carmaker.

Over the past decade, Tesla has become a global leader in electric vehicles. At the same time, its Model S sedan and Model X SUV have become the performance benchmarks for competitors looking to enter their respective segments.

Both cars are made at its factory in Fremont, California. As you might expect from an Elon Musk-run company, Tesla's factory is one of the most advanced automotive production facility in the world. It's equipped with more than a hundred robots.

Ahead of the launch of its Model X SUV in late 2015, Tesla gave Business Insider a peek inside its modern factory.

With the new mass production Model 3 now in the fold, the Tesla is reportedly making modifications to the facility to accommodate the vehicle. However, production of the Model S and X remain as is.

With the unveiling of the production Model 3 just around the corner, here's a look inside the Tesla Factory:

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