Tesla began rolling out firmware 2026.27.200 on 1 September 2026, and it is the first build in the 2026.27 branch to carry a recall notice. The entry sits at the top of the release notes, above FSD and the Summer Update, and reads: "This software update includes the remedy for EU Recall Submission 2026_103555. It restores compliance with UNECE Regulation No. 135." It is listed for Model 3 and Model Y, and marked available worldwide.
What Regulation 135 actually covers
UN Regulation No. 135 sets the uniform provisions for approving vehicles with regard to their pole side impact performance. The approval test pushes the vehicle sideways into a rigid pole on the driver's side, and passing it is one of the type-approval requirements a car must meet to be sold in the EU.
That makes this an unusual recall notice. Pole side impact is normally a matter of structure and restraints — sill design, side curtain and thorax airbags, and the deployment thresholds that fire them. Tesla has not said which of those a software change touches, and the release note does not explain the mechanism.
The rest of the build is carried forward
Diffed against 2026.27.100.1, the build that took the Summer Update into FSD cars with Europe first, the recall notice is the only new entry. Every other heading — FSD (Supervised), Summer Update, Estimated Range, Preferred Routes, Grok Commands, Caraoke with Scoring, Custom Wraps, Camera Preview, Speed Cameras on Route, Web Browser, Security Improvements and the rest — appears in both, unchanged.
| 2026.27.100.1 | 2026.27.200 | |
|---|---|---|
| Released | 24 August 2026 | 1 September 2026 |
| FSD version | 14.2.2.6 | 14.2.2.6 |
| Recall notice | none | EU 2026_103555, UNECE R135 |
| Other release-note entries | 20 | the same 20 |
| Fleet share | about 0.8% | about 0.7% |
Anyone reading a feature list will therefore conclude that nothing changed. The compliance item is the release.
What we could not verify
Three gaps are worth stating plainly. No Tesla press release accompanies this, and the submission number appears only in the release notes. No notice from the Dutch RDW or any other EU approval authority has surfaced. And no outlet has reported the recall — what follows is Tesla's own text, not journalism about it.
The affected population is not known either. The release note names Model 3 and Model Y without model years or a vehicle count, which is the opposite of how a national recall is normally published.
What owners should do
Nothing beyond taking the update. An over-the-air remedy is the point of the notice: the fix arrives with the software and there is no service appointment attached. If you drive a Model 3 or Model Y in Europe and 2026.27.200 is offered, installing it is what closes the recall on your car.
For where the branch stands, FSD 14.2.2.6 remains Hardware 4 only, Europe went first, and penetration is still under one percent — NotATeslaApp recorded 2026.27.200 on about 0.7% of the tracked fleet with 49 installs on the day after release. This is an early build, and most European cars are still weeks away from seeing it.
Update: 2026-09-03
As of 3 September 2026, NotATeslaApp's tracker records 2026.27.200 on about 1.0% of the tracked fleet — 124 cars — up from the roughly 0.7% and 49 installs recorded when this article was published. Ninety cars took the build across 2 September, so the rollout is widening rather than stalling, though it remains an early-stage release.
The same page lists the build for Model S, Model 3, Model X, Model Y and Cybertruck — a wider set than the recall notice itself, which names only Model 3 and Model Y. The R135 remedy therefore ships inside a build that also reaches cars the notice does not name.
Update: 2026-09-16
On 15 September 2026 Tesla began rolling out 2026.27.300, a second European build carrying the same FSD 14.2.2.6 and the same R135 remedy described above. Not a Tesla App's tracker labels it "Europe Fixes" without itemising them, and its release notes repeat the entries 2026.27.200 already shipped rather than adding any. The rollout sits at the same early stage this article recorded for its predecessor: roughly 1% of the tracked fleet, about 115 cars, with most of those installs landing on a single day. For a European Model 3 or Model Y owner the practical reading is that the recall remedy is now reachable on two branches rather than one, and neither has moved far past 1% of the fleet. Source: 2026.27.300 release notes.
Update: 2026-09-21
A reader who owns an affected car shared Tesla's owner notification with TeslAnt. It is dated 10 September 2026 and sent from Tesla's noreply@tesla.com address by a national Tesla entity. The recipient's name, email address and every other identifying detail have been removed; what follows is the substance of the letter.
It answers the three gaps this article listed as unverified, and it does not match the release note in two places.
The mechanism. The letter is specific where the release note was silent. In the affected cars the side pole impact performance "may not meet the applicable regulatory limit" — specifically, the maximum lateral shoulder force may exceed the permitted limit of 3.0 kN, which raises the risk of injury to front-seat occupants in a pole strike. The remedy adjusts the FSAB activation strategy — the far-side airbag, which fires between the front occupants — so shoulder loading stays inside the R135 limit. That is why a structural requirement can be met in software: the change is to when a restraint deploys, not to the body.
The affected population, which is narrower than the release note. The letter names left-hand-drive Model 3 Premium cars, model years 2024–2026, built between 30 June 2024 and 8 May 2026. The release note names Model 3 and Model Y without qualification. On the letter's account no Model Y is affected, and right-hand-drive cars are excluded.
The software versions, which are not the ones in this article. The letter gives the remedy as 2026.26.100.2, 2026.32.3 or later — neither of which is the 2026.27.200 or 2026.27.300 covered above, though those release notes carry the same R135 entry. The likeliest reading is that the remedy ships on several branches and the letter lists the builds validated for closing the recall, but Tesla has not said so, and an owner following the letter to the word would not be looking for a 2026.27 build.
Tesla's instruction to owners is unchanged from what this article advised: check Controls → Software, install if a newer build is offered, and no service visit is required once it lands.
The letter is reproduced below in full, as Tesla wrote it. The greeting, the recipient's name and address, and the sending country have been removed; nothing else has been changed or shortened.
Hello [name removed],
We are hereby informing you that Tesla has issued a safety recall for certain left-hand drive Model 3 Premium vehicles, model year (MY) 2024–2026, manufactured between June 30, 2024 and May 8, 2026. Our records indicate that you own an affected vehicle.
Reason for withdrawal
In the affected left-hand drive Tesla Model 3 Premium vehicles, the side pole impact performance, as per UN Regulation No. 135, may not meet the applicable regulatory limit. Specifically, the maximum lateral shoulder force may exceed the permitted limit of 3.0 kN.
Exceeding the maximum lateral shoulder force limit of 3.0 kN in the side pole impact test may increase the risk of injury to front seat occupants in the event of a side pole impact.
What will Tesla do?
At no cost to customers, Tesla will make available an over-the-air software update that adjusts the FSAB activation strategy to ensure passenger shoulder impact performance complies with UN Regulation R135. The recall solution is found in software versions 2026.26.100.2, 2026.32.3 and later.
What should you do?
Check your vehicle software version by selecting Controls and Software from your touchscreen. If necessary, update your vehicle software to version 2026.26.100.2, 2026.32.3, or later. If you are having trouble updating your vehicle software, please refer to the Software Updates support page. If the issue persists, schedule a service appointment.
No action is required if your vehicle software is version 2026.26.100.2, 2026.32.3, or later. After the update is successfully installed, no further action is required for this recall. No service visit is required if the update is successfully installed.
If you no longer own this vehicle, please ignore this message or contact us so we can update our records.
Thank you, The Tesla Service Team