Tesla concedes HW3 falls short for unsupervised FSD: micro-factories planned to retrofit eligible vehicles
Tesla says its HW3 onboard computer will not be able to support unsupervised Full Self-Driving, a reversal that affects vehicles sold broadly from 2019 to 2023. The shift was discussed during the company’s Q1 2026 earnings call, where Elon Musk outlined a new hardware path for FSD.
A new chip roadmap takes shape
Musk said Tesla is preparing an updated self-driving computer, with naming still in flux but commonly described as AI4.1 or AI4 Plus. The upgrade is expected to double RAM per chip from 16 GB to 32 GB, and with Tesla’s dual-chip setup, total memory would rise to 64 GB.
At the same time, Tesla’s next-generation AI5 chip remains in development and is not expected to enter vehicle production soon. Musk suggested AI5 may be aimed more at Optimus robots and data-center workloads than near-term vehicle FSD.
Why HW3 owners are now in focus?
Tesla has long maintained that HW3 was sufficient for FSD capability, a claim that underpinned sales of the pricey FSD package. With Tesla now conceding HW3 is not enough for unsupervised operation, the company faces pressure to offer a practical path forward for customers.
The situation is complicated further by overlapping hardware labels in recent vehicles, including reports of an AI4.5 configuration appearing in some 2026 Model Y production. That version has been described as using a three-chip design, adding confusion to how Tesla is sequencing its in-car computing generations.
Micro-factories and who qualifies
Tesla’s proposed remedy centers on two options for affected customers who purchased FSD: a discounted trade-in to a newer vehicle with updated hardware, or a retrofit of the existing vehicle. The retrofit would include a newer computer and upgraded cameras, according to Musk’s comments.
To make retrofits feasible at scale, Tesla plans to invest in micro-factories across the US dedicated to the upgrade work. Tesla indicated eligibility would be tied to buying the FSD package, leaving owners of HW3 cars without FSD outside the program.
The announcement also revives a broader question for Tesla’s autonomy strategy: as neural networks grow and software demands rise, today’s hardware targets could again face a moving goalpost. For now, Tesla is betting that AI4-class systems can carry FSD further, even as HW3 hits its ceiling.
