Tesla Update 2026.20.200.1: Do NOT Install — Wipes FSD Streaks, Rolls Back to V14.2.2.5

Tesla owners running Full Self-Driving V14.3 or later should refuse the 2026.20.200.1 software update if it appears in their car, according to a rare public warning from Teslascope late Monday night. Drivers who install it are being reverted from FSD V14.3.4 back to V14.2.2.5, and the update wipes and disables Full Self-Driving streaks in the process. Teslascope believes the rollout was unintentional — an internal factory build that leaked to customer cars — and is now openly recommending owners skip it, which the software tracker notes is possibly the first time it has ever issued that advice.

What's Happening

Teslascope flagged two problems with 2026.20.200.1 in quick succession. First, the update breaks Tesla's long-standing versioning convention, in which builds numbered .100 through .300 have historically indicated factory-only software not intended for the customer fleet. 2026.20.200.1 is the second recent build to violate that pattern, following the European 2026.21.100 release.

Second, and more urgently, the update itself is actively downgrading FSD software on cars that receive it. Drivers on V14.3.4 — the current public FSD build — are being pushed back two revisions to V14.2.2.5. On top of that, Full Self-Driving streaks, the running tally Tesla uses to gauge driver engagement with the system, are being wiped and disabled entirely after installation.

"From all appearances, this appears to be an erroneous rollout and that it WAS meant to be a factory build," Teslascope wrote. The tracker went further minutes later: "This is a very rare occasion (and perhaps the first) where we are actively suggesting Tesla owners to NOT install this update."

What Changed

Action Plan: What to Do Right Now

If 2026.20.200.1 has appeared as an available update in your Tesla app or on your car's touchscreen — do not install it. Here's the practical playbook until Tesla either pulls the build or issues a fix:

1. Do not tap "Install Now" or schedule the update. If your car is set to install updates automatically overnight, open the Software section in the car and switch update preference to "Advanced" so it waits for your manual approval. This is your single most important step.
2. Check your current FSD version before doing anything. Go to Controls → Software and note whether you're on FSD V14.3.4 or later. If you are, you have something to lose — the downgrade to V14.2.2.5 is what Teslascope is warning about.
3. If you value your FSD streak, protect it. Screenshot your current streak count from the app or car display. Streaks disable after installation, so there's no in-car way to preserve the number once you update.
4. Skip Wi-Fi if you're worried about a silent overnight push. Some owners choose to disconnect from home Wi-Fi temporarily until the situation clears. Tesla generally requires Wi-Fi for major OTAs, so this is a reasonable interim safeguard.
5. If you've already installed it — there is no owner-facing way to roll back Tesla firmware. You'll need to wait for a corrective update. Contact Tesla Service through the app to log the FSD downgrade and streak loss; a service record now helps if a fix or streak restoration is later offered.
6. Watch Teslascope and Tesla's own release notes for a follow-up build. Given the tracker's read that this was a mis-targeted factory image, expect Tesla to either withdraw 2026.20.200.1 from the OTA server or ship a superseding version quickly.

Why This Matters Beyond the Bug

Two things make this incident unusual. The first is Teslascope openly telling owners to refuse an OTA — the tracker explicitly framed it as a "very rare occasion (and perhaps the first)" that it has issued that advice.

The second is the versioning break. Tesla's .100/.200/.300 convention has been a reliable signal to the enthusiast community for years: those numbers meant factory builds, not customer releases. With 2026.20.200.1 and the European 2026.21.100 both landing on customer cars, that signal no longer holds. Teslascope is publicly asking Tesla and Tesla AI to return to the old pattern "so drivers can be better educated and to avoid confusion."

For FSD subscribers on V14.3 or later, the streak wipe is the sting owners will feel most immediately — those counts represent weeks or months of consistent supervised-autonomy use, and there is no user-side recovery mechanism. Whether Tesla restores streaks server-side after a corrective push is the open question worth watching.

Editor's View

The one silver lining in 2026.20.200.1 is the legitimate feature it does carry: dashcam clip encryption. Saved USB footage is now decryptable only through your own vehicle or dashcam.tesla.com — a real privacy improvement for anyone whose drive recorder has ever been lost, stolen, or seized. That feature is worth having. It's just not worth losing FSD V14.3.4 and your streak history to get it early. Wait for the clean build.

📋 Tracking Tesla software? See every firmware, FSD and app version in one place in our Tesla Software Update Tracker.

This report was curated by the BASENOR Editorial Desk from the sources listed above. Read our editorial standards or email editorial@basenor.com to report an error.