WHD.9813 Firmware Update — July 2026

Firmware release: July 2026

Not sure which unit you have? Check the About screen at step 8 — the version numbers start with the model name. If yours reads WHD9813, you're on the right page. If you have an HDHU.V2 (2014–2023 Touring), use that page instead.

What this update fixes

• Updates the CarPlay & Android Auto protocols
• Fixes the album artwork & metadata bug on the Now Playing home screen
• Fixes a touchscreen failure during start-up
• Corrects SiriusXM equalisation

Before you start

You need a blank USB Type-A flash drive that meets all of the following:

A flash drive of unknown USB specification will slow data transfer and can corrupt the system processors. If the drive isn't empty, format it first — here are instructions for formatting a flash drive in Windows.

The download is 149MB, so do that part on Wi-Fi before you head out to the bike. The update itself runs for a few minutes on the head unit, and it must not be interrupted — make sure your battery is healthy or the bike is on a tender.

Update instructions

Download WHD9813_202607.zip
149 MB — download on Wi-Fi

1. Download WHD9813_202607.zip using the button above.

2. Extract the zip. Copy ISPBOOOT.BIN and the update folder — with st25mcu.bin inside it — to the blank USB Type-A flash drive.

   Don't rename anything. The folder and the MCU file extract in lower case — update and st25mcu.bin — while the screenshot below, taken on an earlier build, shows the folder in capitals. Either is fine: the flash drive and the head unit both ignore capitalisation. What matters is that the spelling is unchanged and nothing extra has been added to the names.

   The two items must sit in the root of the drive, with nothing else on it:

   

   On a Mac: extracting the zip also creates a hidden __MACOSX folder. Delete it from the flash drive before you go any further, or the WHD.9813 may report "No Upgrade File Found!"

3. Connect the flash drive to the USB Type-A input for the WHD.9813, usually installed inside one of the storage compartments.

4. Turn the bike on to accessory power.

5. After the WHD.9813 completes its start-up sequence the main menu should appear. If not, tap the Back arrow in the top left corner until the home screen is displayed. Tap the SoundStream logo at top centre to open the widgets menu.

   

6. Tap the Settings gear icon in the widgets menu, top right corner.

   

7. If it isn't already highlighted, select the General settings icon — the gear and wrench, top left of the four settings icons.

   

8. Scroll down to and select About, at the bottom of the General Settings list. This displays the current MCU and SOC software versions of your WHD.9813.

   

9. Tap the Update button, centre, below the SOC version.

   

10. A screen pops up showing the Current Version for SOC and MCU, alongside the Upgrade Version available for each. Check that:

    • SOC Upgrade Version reads WHD9813-260724-1
    • MCU Upgrade Version reads WHD9813-260602-1

    If both are correct, tap Update All.

    

    If your MCU already reads WHD9813-260602-1 in the Current Version column, that's normal — some units shipped with that MCU build already on board, as the screenshot above shows. Tap Update All anyway; only the SOC will change.

    Version not listed, or "No Upgrade File Found!"? Double-check the file names on the flash drive. There must be a file named ISPBOOOT.BIN — note the three O's — and a folder named update with a file inside it named st25mcu.bin. Capitalisation doesn't matter, but any extra characters do: a name like ISPBOOOT (1).BIN or update copy will cause this error. Also delete any additional or hidden files on the drive, including the __MACOSX folder if you extracted the zip on a Mac. Then repeat steps 3–10.

11. After a moment the MCU Update pop-up appears with a progress bar. When it completes, the screen may switch off or flash for a few moments. This is normal — don't touch anything.

    

12. After several seconds the SOC Update pop-up appears with its own progress bar. When it finishes, the WHD.9813 restarts. Once it has restarted you can remove the flash drive from the USB input.

    

13. To confirm the update was successful, repeat steps 5–8. You should now see:

    • MCU: WHD9813-260602-1
    • SOC: WHD9813-260724-1
    

If the versions don't match

If the SOC and MCU versions don't match the picture above, double-check that the file names are correct — ISPBOOOT.BIN, and a folder named update with a file inside named st25mcu.bin. Correct the file name(s) and repeat steps 3–13.