Older Tesla owners may have to opt for trade ins to get FSD Tesla owners whose cars operate on its 2019 Hardware 3 system might have to trade in their vehicles to experience the company's unsupervised full self-driving mode, CEO Elon Musk told investors as his company was reporting first-quarter earnings on Wednesday, April 22. "Unfortunately, Hardware 3 -- I wish it were otherwise, but Hardware 3 simply does not have the capability to achieve unsupervised FSD," Musk told Tesla investors on the live call. "We did think at one point it would have that, but relative to Hardware 4, it has only 1/8 of the memory bandwidth of Hardware 4. And memory bandwidth is one of the key elements needed for unsupervised FSD." Musk continued: "So for customers that have bought FSD, what we're offering is essentially a trade-in -- like a discounted trade-in for cars that have AI4 hardware, and we'll also be offering the ability to upgrade the car, to replace the computer. And you also need to replace the cameras, unfortunately, to go to Hardware 4." The comments as Musk has been touting Tesla's forthcoming pivot to producing mostly autonomous vehicles. "Over time, it's going to make sense for our whole lineup to be autonomous vehicles of different sizes," Musk said on the call. "In fact, long term, the only manually driven car will be the new Tesla Roadster." What is Tesla's Hardware 3 system, and why does the company say its older cars can't operate Full Self Drive? Tesla's Hardware 3 is an AI computer that has been onboard its cars since 2019 that was intended to be used to power the company's Full Self Drive software. But Musk said on the investor call that the older cars don't have enough memory bandwidth to properly