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How to set a custom lock sound on your Tesla

Published Oct 22, 2026 · Updated Oct 22, 2026 · 3 min read · By VoltCoach

Play your own sound when the car locks: what you need and how to set it up.

Since the 2023 holiday software update, many Teslas can play a sound of your choice when the car locks. You need a short audio file and the USB drive that comes with the car.

What you need

• A car with an external pedestrian warning speaker. Cars from around late 2019 onward generally have one, but it varies by model and region. If your car makes a sound at low speeds, it has one.
• A sound file in .wav format, under 1 MB, named exactly LockChime.wav.
• The USB drive from the glove box (the one used for Dashcam and Sentry Mode).

Steps

1. Save your file as LockChime.wav in the top level of the USB drive, not inside a folder.
2. Make sure it really ends in .wav. Some computers hide file extensions.
3. Put the drive in the car.
4. Open Toybox (it may be under the All Apps menu), then Boombox.
5. Turn on Lock Sound and choose USB from the list.

Good to know

• Only one custom lock sound can be active. To switch, rename the file you want to LockChime.wav and replace the old one.
• The custom horn sound only plays while parked; when driving, the horn goes back to the standard sound.
• Keep the clip short and considerate. It plays outside the car.

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