The National Highway Traffic Safety Administration is currently investigating Tesla due to four crashes last year that involved its self-driving technology, which has raised significant safety concerns.

As safety issues mount, Tesla faces considerable challenges with its self-driving technology, which impacts approximately 4 million vehicles.

In response to these challenges, Tesla is in the process of replacing the self-driving computers in these vehicles, moving from the outdated HW3 technology to the new HW4 technology required for Full Self-Driving capabilities.

Elon Musk has announced that the company will upgrade and refit these computers for vehicle owners, marking another setback in Tesla's self-driving ambitions.

Tesla currently offers two self-driving programs: Autopilot, which includes traffic-aware cruise control and Autosteer, and Full Self-Driving, which features more advanced capabilities like Navigate on Autopilot and Autosteer on City Streets.

Despite ongoing criticisms, Tesla maintains that drivers must remain vigilant, as the current technologies do not render the vehicles fully autonomous.

The company has also faced multiple recalls for its Model S, X, and Cybertruck vehicles, with the Cybertruck experiencing eight mass recalls in less than a year since its release.

Founded in 2003, Tesla has been a leader in the electric vehicle market, but recent issues with recalls and increasing competition from firms like BYD in China are threatening its market position.