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What upgrading a Hardware 3 Tesla to AI4 actually involves right now
There’s no way to buy a Hardware 3-to-AI4 computer upgrade today; here’s what Tesla has actually promised and what the headline retrofit really is.
Tesla is shipping a second FSD v14 Lite build to Hardware 3 cars
FSD v14.1 Lite arrives as firmware 2026.21.6 for older Hardware 3 Model 3 and Model Y cars, following reports of Autopilot computer overheating on the first v14 Lite release.
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