Buell XB12R 2010–2025 — technical service bulletin
Bulletin M1391A · NHTSA communication 11025167 · issued Oct 28, 2025
Technical service bulletin
communication type
Electrical System
component
2010–2025
model years
60
vehicle entries
Official summary
SERVICE BULLETIN M1391A (REVU): MIDTRONICS GRX-3110 AND DCA-8000 SOFTWARE. PURPORSE: Revision U. The purpose of this bulletin is to inform the dealer network that a software update to the GRX-3110 and DCA-8000 is now available. DYNAMIC DIAGNOSTIC CHARGER SYSTEM (PART NUMBER: DCA-8000). [Rev U] Added: Description of improvements made to the testing algorithm for GRX software Version P and DCA-8000 software Version E.
Vehicles covered
- 2010 Buell XB12R
- 2010 Buell XB12SCG
- 2010 Buell XB12SS
- 2010 Buell XB12X
- 2010 Buell XB12XP
- 2010 Buell XB12XT
- 2010 Buell XB9SX
- 2012 Harley-Davidson FLD
- 2014 Harley-Davidson FLD
- 2015 Harley-Davidson FLD
- 2016 Harley-Davidson FLD
- 2017 Harley-Davidson Flde
- 2018 Harley-Davidson Flde
- 2019 Harley-Davidson Flde
- 2020 Harley-Davidson Flde
- 2018 Harley-Davidson FLFB
- 2019 Harley-Davidson FLFB
- 2025 Harley-Davidson FLFB
- 2018 Harley-Davidson Flfbs
- 2019 Harley-Davidson Flfbs
- 2020 Harley-Davidson Flfbs
- 2021 Harley-Davidson Flfbs
- 2022 Harley-Davidson Flfbs
- 2023 Harley-Davidson Flfbs
- 2024 Harley-Davidson Flfbs
- 2018 Harley-Davidson Flfbs Anv
- 2020 Harley-Davidson Flfbsanv
- 2023 Harley-Davidson Flfbsanv
- 2018 Harley-Davidson Flfbs Anx
- 2021 Harley-Davidson FLH
- 2017 Harley-Davidson FLHC
- 2018 Harley-Davidson FLHC
- 2019 Harley-Davidson FLHC
- 2020 Harley-Davidson FLHC
- 2021 Harley-Davidson FLHC
- 2025 Harley-Davidson FLHC
- 2018 Harley-Davidson Flhcs
- 2019 Harley-Davidson Flhcs
- 2020 Harley-Davidson Flhcs
- 2021 Harley-Davidson Flhcs
- 2022 Harley-Davidson Flhcs
- 2023 Harley-Davidson Flhcs
- 2024 Harley-Davidson Flhcs
- 2018 Harley-Davidson Flhcs Anv
- 2019 Harley-Davidson Flhcs Anv
- 2020 Harley-Davidson Flhcs Anv
- 2021 Harley-Davidson Flhcs Anv
- 2022 Harley-Davidson Flhcs Anv
- 2023 Harley-Davidson Flhcs Anv
- 2023 Harley-Davidson Flhfb
- 2010 Harley-Davidson FLHP
- 2011 Harley-Davidson FLHP
- 2012 Harley-Davidson FLHP
- 2013 Harley-Davidson FLHP
- 2014 Harley-Davidson FLHP
- 2015 Harley-Davidson FLHP
- 2016 Harley-Davidson FLHP
- 2017 Harley-Davidson FLHP
- 2018 Harley-Davidson FLHP
- 2019 Harley-Davidson FLHP
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.