A growing number of Tesla owners running the new Full Self-Driving v14 “Lite” build on Hardware 3 (HW3) vehicles are reporting Autopilot computer overheating alerts — and, in some cases, outright computer failures.
The reports have stacked up in the two weeks since Tesla pushed v14 Lite to wide release, and four owners have contacted Electrek directly about the same problem.
What FSD v14 Lite is doing to older hardware
Tesla started rolling out FSD v14 Lite to HW3 cars in late June and pushed it to wide release with software version 2026.20.6.11 (FSD v14.3.6) on July 21.
The build is a distilled version of the HW4 v14 model, squeezed down to run on the memory-constrained AI3 computer. That computer is the constraint: HW3 ships with 8GB of RAM and roughly one-eighth of HW4’s memory bandwidth, which is why Tesla was stuck running v12.6 on these cars for more than a year before the Lite build.
