Tesla FSD v14 Lite tied to rising HW3 computer failures, owners report

This is Tesla news, not a home energy story, but here is what happened. Owners of older Tesla vehicles with "Hardware 3" (HW3) self-driving computers are reporting overheating and, in some cases, full failures of that computer after installing a new version of Tesla's Full Self-Driving software called "v14 Lite." Tesla pushed this update to HW3 cars in late June and made it widely available on July 21. HW3 has much less memory and processing power than Tesla's newer computer, and the new software appears to demand more than the older chip can handle. Several owners have posted screenshots showing the computer hitting temperatures above 90°C, triggering a shutdown of self-driving features until it cools. Some report the computer dies completely and has to be replaced.

Overheating alerts on HW3 aren't new — they've long been linked to cooling system issues like low coolant or a clogged radiator — and Tesla hasn't confirmed the software is to blame. But the timing, with failures clustering right after the update, has raised questions about whether the new software is accelerating wear on aging hardware.

This story doesn't involve home energy upgrades or rebates. If you're a Tesla owner with an HW3 vehicle, the practical point is that thermal alerts and computer failures are being reported after this software update, though the cause hasn't been officially confirmed.