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Updates & Downloads

Forerunner® 645 Music

Update Unit Software with Garmin Express

Use Garmin Express to keep your device software up to date.


Unit Software

  • * Beta Software: Forerunner 645 Beta, Ver. 4.02, Beta as of Oct 29, 2018, Download

*Although this software is believed to be reliable, it has not yet been released for production and should be used at your own risk.