Tesla has started sending out its FSD v14 Lite update to a small group of early-access owners running older Hardware 3 vehicles, after those cars had been stuck on the previous v12.6.4 software for more than a year.
Getting this update onto older hardware wasn’t simple. Hardware 3 (HW3) has way less memory bandwidth and processing power than the newer Hardware 4 chip (HW4) found on the latest cars, so Tesla had to find a workaround rather than just porting the software over directly. The company ended up distilling the driving behaviour from its newer HW4 models down into something that could actually run on the older computer.
“The AI3 computer only has ~15% of the effective memory bandwidth of AI4, so this was a tough challenge,” said Elon Musk, praising the Tesla AI team.
Tesla’s AI lead, Ashok Elluswamy, confirmed the rollout on Sunday evening. “FSD v14 Lite is now rolling out to AI3 early-access customers. Based on the feedback, will rollout to more customers over the next few weeks,” he wrote. He added that “this build distills the driving behaviour from AI4’s v14 series into both the camera and compute config of AI3,” noting it also includes destination options.
A few early testers have already weighed in after spending the weekend with it. One early access tester, Canadian Zack who lives in California, called the update a “massive leap” over the old software. “FSD v14 lite highway performance is a massive leap over v12.6.4,” he wrote, adding simply, “So so good.”
Later, in Zack’s write up, he noted that the update brings a completely redesigned user interface that mirrors newer HW4 vehicles (which also have the newest cameras). The system introduces a dedicated “Start Self-Driving” button on the centre screen alongside highly customizable speed profiles, which include Sloth, Chill, Standard, and Hurry modes. Also, the software adds advanced destination options that allow the vehicle to automatically manage arrivals, navigating directly into driveways or executing precise curbside and supermarket parking maneuvers.
Zack reported that the overall driving performance felt like a massive leap over the previous software architecture, noting that the car handles highway lane changes and high-speed cornering with exceptional smoothness and precision. He specifically praised the system’s improved decision-making skills at night in L.A., highlighting how consistently the vehicle maintained its set speed limit without dropping speed randomly. The updated driver monitoring system also proved far less intrusive, resulting in significantly fewer steering wheel prompts during extended trips.
For now, Tesla’s keeping this limited to a small early-access group while it watches how the software performs in the real world. If that goes well, the update is expected to eventually make its way out to roughly 4 million HW3 vehicles worldwide where FSD is approved, and Canadians are likely to get this as part of the next wave of rollouts (as we’ve seen in the past).
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