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Service bulletin M1490

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10242178
Published by NHTSA2023-09-11
Manufacturer's numberM1490
Manufacturer's date2023-09-08
NHTSA componentELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; UNKNOWN OR OTHER

NHTSA's summary

SERVICE BULLETIN M1490 (V 23.6.1): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision (V 23.6.1). 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 23.6.1. Release Date: Week of August 21st, 2023 - Changes. Version 23.5.6 Release Date: Week of August 11th, 2023 - Changes. Version 23.5.5 Release Date: Week of August 1st, 2023 - New Features, Changes.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance, Electrical system, Engine, Equipment and accessories

Vehicles listed
HARLEY-DAVIDSON HARLEY-DAVIDSON

Listing a model year does not mean every vehicle of it is concerned: the document says which.