Tesla 2026.8 Update: What Actually Changed for Lock Sounds

Tesla 2026.8 rolled out in early 2026. If you are searching because your lock sound stopped working or sounds different after updating, this guide covers the real changes and the fixes.

The short version

Your LockChime.wav still works the same way after 2026.8. The custom lock sound feature, introduced in Tesla's 2023 Holiday Update (software 2023.44), was not removed or fundamentally changed in 2026.8. The file format requirements have not changed: a WAV file named exactly LockChime.wav, placed in the Boombox folder on a FAT32 or exFAT USB drive.

Correction notice: An earlier version of this article claimed 2026.8 introduced separate unlock sounds (UnlockChime.wav) and scheduled sound profiles. Those claims were not supported by the official 2026.8 or 2026.14 release notes, and we have retracted them. The safe position: there is no UnlockChime.wav feature in current Tesla firmware.

What 2026.8 actually changed

The release notes for 2026.8 do not list audio/Boombox changes as a headlining feature. Owners have reported:

●Boombox preference reset: Some owners found their custom sound deselected after updating. This is the most common reported issue. Fix: go to Controls > Toybox > Boombox > Lock Sound and re-select your file.

●Volume changes: A subset of owners report the lock sound being quieter post-update. This may reflect speaker normalization changes or a Boombox reset to default volume. Use our audio converter to boost your file if needed.

●Menu location shift: On some models, the Boombox/Lock Sound menu shifted slightly within the interface.

If your lock sound stopped working after 2026.8

File Format Verification

Tesla now validates WAV files more strictly:

●Must be uncompressed PCM WAV

●Sample rate checked more rigorously

●Corrupt files are rejected with on-screen error message

How 2026.8 Affects Your Current Sounds

If Your Sounds Got Quieter

This is the most common issue owners report after updating. Here's why:

1. Go to Controls > Toybox > Boombox > Lock Sound
2. Re-select your file from the USB drive
3. If the file is not detected, remove and reinsert the USB, then check that the Boombox folder and LockChime.wav filename are spelled exactly right

If the sound plays but is quieter than before, use our audio converter to boost the file, or download a fresh copy from the sound library which is already volume-optimized.

If the sound file is rejected as "unsupported format," the recommended fix is to re-export via our converter — it normalizes the WAV to the spec Tesla reads most reliably (44.1 kHz, 16-bit PCM).

Your LockChime.wav file format has not changed

Nothing about the accepted format changed in 2026.8. The only hard requirement is a WAV file named exactly LockChime.wav. Recommended settings for clean playback (not official Tesla requirements):

●44.1 kHz sample rate

●16-bit PCM

●1 to 5 seconds

●Under 1 MB

FAQ

Will my existing LockChime.wav still work after 2026.8?

Yes in most cases. The file format requirements have not changed. If your sound stops working after updating, the most likely cause is a Boombox preferences reset — go to Controls > Toybox > Boombox > Lock Sound and re-select your file.

My Tesla lock sound got quieter after the update. How do I fix it?

Use our audio converter to boost your file, or download a fresh pre-optimized sound from the library. A firmware update sometimes resets the Boombox volume setting as well as the file selection.

Can I set a separate unlock sound with 2026.8?

No. There is no UnlockChime.wav feature in Tesla firmware. The official 2026.8 and 2026.14 release notes do not list separate unlock sounds as a feature. Your LockChime.wav plays on lock only. An earlier version of this article claimed otherwise and was retracted.

On 2026.9.1 and lock sound is completely silent?

That is a different issue from the 2026.8 volume change. See Tesla Lock Sound Muted After 2026.9 Update for the fix.