Technical Service Bulletin M1640 — 2023 HARLEY-DAVIDSON FLHXSE
POWER TRAIN
Bulletin Details
| TSB ID | M1640 |
| Manufacturer | |
| Vehicle | 2023 HARLEY-DAVIDSON FLHXSE |
| Component | POWER TRAIN |
| Communication Date |
Bulletin Summary
SERVICE BULLETIN M1640: COOLING SYSTEM ENHANCEMENT FOR 2024 CENTER COOLED TOURING MODELS. PURPOSE: This bulletin inform dealers that starting on April 30, 2024, all Center-Cooled touring vehicles will be assembled with new components, engineered to help improve a service bleed of the cooling system. • Before March 12, 2024 all vehicles were built with the early system. • From March 12, 2024 to April 30, 2024 vehicles were built with early and late system designs. • After April 30, 2024 all vehicles were built with the late design. The components used in Early Models are listed in Table 2. The components used in Later Models are listed in Table 3. These parts will be listed separately in the parts catalog labeled as Early and Later models with an applicable date noted. Do not mix the components used in Early and Later Models. They are not interchangeable. Should Early Model components become unavailable in the future, see the Parts Catalog and Parts Price File for super session information.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.