WHD.9813 Firmware Update

WHD.9813 Headunit Firmware Update (July 2026)

THIS UPDATE IS FOR SOUNDSTREAM WHD-9813G INSTALLED IN 1998-2013 HARLEY-DAVIDSON TOURING MOTORCYCLES.  ATTEMPTING THIS UPDATE TO ANY OTHER MODEL OF HEADUNIT WILL CORRUPT THE CPU; “BRICK IT.” HEAD UNITS CORRUPTED BY ATTEMPTING AN INCORRECT FIRMWARE UPDATE ARE NOT COVERED BY THE MANUFACTURER’S WARRANTY.

Release notes:
- Updates CarPlay & Android Auto protocols
- Corrects bug for album picture & metadata at Now Playing on Home
- Corrects bug for touch screen failure during start-up
- Corrects SiriusXM equalization

WARNING: Before attempting this update, please read these instructions carefully and don’t skip any steps, and be sure to use a blank flash drive (FAT32 format) from a reputable brand (SanDisk, Samsung, etc). If the flash drive is not empty, be sure to format it. You can find instructions on how to format a flash drive HERE.

A minimum 4GB or larger (32gb Max) USB Type-A flash drive with USB 2.0 or 3.0 is required. Larger flash drive sizes like 64gb or larger will not work. Using a flash drive with unknown USB specification will diminish data transfer and can corrupt the system processors. Use reliable name-brand USB flash drives. We use and recommend SanDisk Cruzer.

Update Instructions:

1. Download WHD9813_202607.zip from THIS LINK. 

2. Extract the contents of WHD9813_202607.zip. Copy ISPBOOOT.BIN & the UPDATE folder with ST25MCU.BIN inside to the blank USB Type-A flash drive.

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

4. Turn on the bike to accessory power.

5. After WHD.9813 has completed 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 top center to open the widgets menu.
   

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

 7. If not already highlighted, select the gear & wrench General settings icon, top left of the four settings icons.

8. Scroll down to and select About at the bottom of the General Settings list. This will display the current software versions and serial number of your WHD.RG.

9. Tap the Update button at center below Hardware version.
   

10. A screen should pop-up with Current Version software information for SOC and MCU, as well as Upgrade Version available for each. The Upgrade Version for SOC should show WHD9813-260724-1, the Upgrade Version of MCU should show WHD9813-260602-1. If the correct Upgrade Versions numbers are shown, tap the Update All button.
    

 

If one of the new versions is not listed, or a pop-up window appeared after pressing Update displaying “No Upgrade File Found!” double check the files on the flash drive are named correctly. The first file should be named ISPBOOOT.BIN, and a folder named UPDATE with a file inside it should be named ST25MCU.BIN. Any additional characters in the folder or file names may have caused this error message to appear. Also, delete any additional files that may have been previously hidden. Then, repeat steps 3-10.

 

 

11.  After a moment, the MCU Update pop-up should appear, with its progress bar. When it completes, the screen may turn off or flash for a few moments.

 

12.  After several seconds, the SOC Update pop-up will appear with its progress bar. After it completes, WHD.9813 will restart. It is ok to remove the flash drive from the USB input after WHD.9813 has restarted.

 

13. To confirm the update was successful, repeat steps 5-8. MCU version should now be WHD9813-260602-1; SOC version should now be WHD9813-260724-1.

 

 

If the SOC and MCU sequence do not match to the picture above, double check the files names are correct, ISPBOOOT.BIN, a folder named UPDATE with a file inside named ST25MCU.BIN. Correct the file name(s) and repeat steps 3-13. If trouble persists, contact Soundstream tech support: phone: 866-906-6866, e-mail: harley-tech@motorcycleaudio.com.