Elon Musk Admits Tesla’s Hardware 3 Can’t Deliver Full Self-Driving After Years of False Promises

For more than a decade, Tesla CEO Elon Musk has repeatedly assured customers that fully autonomous driving was imminent. Yet despite those promises, Tesla has yet to deliver on its vision of unsupervised Full Self-Driving (FSD).

In early 2019, Tesla began installing Hardware 3 (HW3) in its vehicles, which Musk claimed would enable what the company markets as “Full Self-Driving.” However, the current FSD system still requires drivers to remain alert and ready to take control at any moment.

Over the next four years, Tesla sold millions of cars equipped with HW3, only for Musk to finally acknowledge in January 2025 that the hardware was fundamentally inadequate for true autonomous driving. A retrofit would now be necessary—a revelation that has left many owners feeling misled.

During Tesla’s earnings call on Wednesday, Musk was unusually direct about the limitations of HW3.

“Unfortunately, Hardware 3 — I wish it were otherwise — but Hardware 3 simply does not have the capability to achieve unsupervised FSD,” Musk stated. He cited “memory bandwidth” as the primary bottleneck.

Tesla introduced a confusingly named update in April 2024: “FSD (Supervised),” which still requires human oversight. The term “unsupervised” FSD, by contrast, implies true autonomy. Despite Musk’s admission over a year ago, Tesla has yet to begin mass retrofits, leaving millions of owners in limbo.

Musk revealed that Tesla is now exploring the creation of “microfactories” in major cities to upgrade HW3 vehicles with a new computer and camera system. He emphasized the long-term necessity of this transition:

“I do think over time it’s gonna make sense for us to convert all HW3 cars to HW4, because that’s what enables them to enter the Robotaxi fleet and have unsupervised FSD.”

However, questions persist about Tesla’s transparency and execution. The company has known about HW3’s limitations for years, yet Musk’s latest plans remain vague. While he mentioned a potential “discounted trade-in” program, no further details were provided.

The financial and logistical challenges of retrofitting millions of vehicles are substantial. Electrek noted that establishing new production lines in metropolitan areas would be costly, especially as Tesla’s profitability continues to decline. The company’s latest earnings report revealed thin margins following years of falling revenues.

Tesla owners are growing increasingly impatient with Musk’s repeated delays and shifting timelines. The admission that HW3 cannot deliver on its promises has only intensified scrutiny of the company’s marketing and technological claims.