Tesla Inc. (NASDAQ: TSLA) CEO Elon Musk confirmed that the first Cybercab prototype utilizes a nickel cathode manufactured locally at Gigafactory Texas. This development underscores the automaker's push for domestic battery material sourcing as US trade policies tighten.

Domestic sourcing highlights

Musk shared the update on social media platform X, quoting an official Robotaxi handle. The post displayed the vehicle with the caption, "Made with nickel cathode manufactured locally at Gigafactory Texas!" Musk reiterated this point in his own post, emphasizing the local origin of the critical battery component.

This move aligns with previous statements from Musk regarding the high percentage of American-made content in Tesla vehicles. He had earlier noted that the Model 3 and Model Y possess the greatest amount of domestically sourced materials compared to competitors such as Ford Motor Co. (NYSE: F).

Tariff landscape and supply chain shifts

The emphasis on local production comes as the Trump administration imposes heavy tariffs on non-American content in vehicles. These regulatory pressures have prompted multiple manufacturers to shift supply chains and boost US-based production to mitigate costs.

Automotive tariffs were also a central issue in recent US-Canada trade negotiations, which stalled with both sides attributing the breakdown to the other party. The focus on domestic content aims to reduce exposure to these international trade barriers.

Regulatory and operational context

Separately, Tesla is set to build a $4.3 billion battery plant in Michigan with LG Energy Solution, further expanding its domestic footprint. The company also operates a lithium refinery in the US, which Musk described as the largest in America.

Market reaction and other news

Tesla shares declined 0.56% to $378.00 during overnight trading on Wednesday. In unrelated commentary, podcaster Joe Rogan noted that Tesla vehicles emit more brake dust due to their weight. However, Tesla investor Sawyer Merritt countered this claim by pointing out that regenerative braking systems handle a significant portion of braking duties in Tesla cars.

Podcaster Joe Rogan criticized electric vehicles for producing excessive brake dust, a claim directly challenged by Tesla investor and influencer Sawyer Merritt. The debate highlights ongoing consumer concerns regarding particulate emissions in EVs, even as Tesla prepares for its high-profile Roadster launch.

Brake dust controversy

In episode #2556 of The Joe Rogan Experience, Rogan stated that while he loves his Tesla, the vehicle generates "way more brake dust" than traditional cars, contributing to urban pollution. Merritt responded on social media platform X, asserting that EVs do not emit more brake dust because drivers rarely use mechanical brakes due to regenerative braking technology.

Merritt explained that one-pedal driving allows the electric motor to recapture energy when the driver lifts off the accelerator, effectively bypassing the physical brake pads in most scenarios. This process reduces wear and minimizes particulate matter released from friction braking.

Upcoming product and AI integration

Tesla is scheduled to host the launch event for its Roadster high-performance vehicle on October 1. CEO Elon Musk described the unveiling as "guaranteed" to excite enthusiasts. The company has reopened reservations for the model, requiring a $50,000 deposit from prospective buyers.

In parallel, Musk announced that Tesla vehicles now integrate Grok AI functionality from SpaceX. The system can manage inboxes, calendars, and other tasks. However, motoring journalist James May described the voice assistant as "insincere" during his testing of the feature.

Market reaction

Investor sentiment appeared cautious following these developments. Tesla shares declined 0.34% to $378.81 during overnight trading on Wednesday. The stock movement suggests that while product launches generate buzz, operational details and public critiques continue to influence short-term price action.