Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
M1490
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1490 (V 26.8.3): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version Version 26.8.3, Release Date: Week of July 24, 2026. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions. New Features - Harley-Davidson: 2023-2024 Touring: Updated Electronic Control Module (ECM) calibration offerings. LiveWire: S2DM/MH/AP: Calibration bundle 10.2.28: Telematic Control Unit (TCU) reflash updates. Change: Vehicle Setup: Body Control Module (BCM) – Tire Pressure Monitoring System (TPMS) Replacement: Correct issue where tire size selections were not available. System Info – Auxiliary Load Controller (ALC): Added Bike configuration field. Data Items – Trike ECM: Improved display of Gear Position when in reverse. Amp – Added support for (Part No. 76001619).
L1024
Service Bulletin/Repair Instructions
SERVICE BULLETIN L1024: LIVEWIRE ONE (LW1) INSTRUMENT MODULE REPLACEMENT. Initial Release. This bulletin informs dealers that the Original Equipment (OE) Instrument Module (Part No. 70901100) has been discontinued and is no longer available to order as a replacement componentfor the 2021-2023 LiveWire ONE (LW1). See Figure 1. If the Instrument Module (IM) needs to be replaced, use one of the following replacement kits: • Part No. 76001482 (EV 1-DOM) • Part No. 76001483 (EV 3-HDI). This kit will replace the original instrument with a 4-inch round instrument along with the supporting parts. Instruction sheet 94100595 outlines the process of installing the kit. Due to the differences in the instrument modules, appearance and functional content in this bulletin MUST be given to the vehicle owner. The attached items in this bulletin are: • Owner's Manual (OM) content to explain the operation of the new instrument module • Electrical Diagnostic Manual (EDM) content with an updated wire schematic and diagnostic procedure • Service Manual content to remove and install the round instrument module.
L1024_Customer Letter
Service Bulletin/Repair Instructions
SERVICE BULLETIN L1024: LIVEWIRE ONE (LW1) INSTRUMENT MODULE REPLACEMENT (CUSTOMER LETTER). Intial Release. This bulletin informs vehicle owners that the Original Equipment (OE) Instrument Module (Part No. 70901100) has been discontinued and is no longer available to order as a replacement component for the 2021-2023 LiveWire ONE (LW1). If the Instrument Module (IM) needs to be replaced, one of the following replacement kits will be available: • Part No. 76001482 (EV 1-DOM) • Part No. 76001483 (EV 3-HDI). This kit will replace the original instrument with a 4-inch round instrument along with the supporting parts. Due to the differences in the instrument modules, appearance and functional content in this bulletin MUST be given to the vehicle owner. The attached items in this bulletin are: • Owner's Manual (OM) content to explain the operation of the new instrument module • Electrical Diagnostic Manual (EDM) content with an updated wire schematic and diagnostic procedure • Service Manual content to remove and install the round instrument module.
M1555
Service Bulletin/Repair Instructions
SERVICE BULLETIN M1555 (REV G): BATTERY WARRANTY GUIDELINES. PURPOSE: [Revision G: Updated: Information on Battery. Update section headers: AGM and Lithium-Ion Batteries.] This bulletin informs the dealership network that Harley-Davidson has provided guidelines for battery warranty.
W146
Warranty Program/Extension
WARRANTY BULLETIN W146 (REV B): TIRE TREAD DEPTH GUIDE-UPDATE. PURPOSE: [Revision B. Updated: Tire Tread Depth Guide. Add tire part numbers 43200063 and 43200038A.] To provide tire tread depth specifications for the dealership network to consult when filling warranty claims on used tires. Please see the Warranty Manual of your region for tire policy guidelines. Updated: Tire Tread Guide. Add tire part number 43100038B. Update tire tread depth, adjustment and reimbursement.
L1005
Service Bulletin/Repair Instructions
SERVICE BULLETIN L1005: BLUETOOTH PAIRING INSTRUCTIONS AND TIPS. PURPOSE: To provide both Harley-Davidson and LiveWire dealers a single document that includes greater detail about Bluetooth pairing a phone to the instrument module.
L1002
Service Bulletin/Repair Instructions
SERVICE BULLETIN L1002: 2021-2022 LIVEWIRE ONE ONBOARD CHARGER (OBC) SOFTWARE UPDATE. PURPOSE: A software update is available for the 2021-2022 LiveWire One Onboard Charger (OBC). The low temperature threshold for Direct Current (DC) to DC (12 V battery maintenance) has been revised from 32 °F (0.0 °C) to 5 °F (-15.0 °C). This change reduces the possibility of a 12 V battery discharge in cold weather storage. Additionally, enhancements have been made to reduce compatibility concerns at public level 3 charging stations. This allows a user to use level 3 chargers which may have previously displayed errors when connected to a LiveWire One.