NHTSA Service Bulletin 11016837: 2024 Harley-davidson Flhx
Official manufacturer communication context for 2024 Harley-davidson Flhx, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
SERVICE BULLETIN M1640 (REV A): COOLING SYSTEM ENHANCEMENT FOR 2024 CENTER COOLED TOURING MODELS TOURING MODELS. PURPOSE: Revision (A). Updated: Part Numbers, Part No. 62800073 is obsolete. 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 supersession information.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11016837?
SERVICE BULLETIN M1640 (REV A): COOLING SYSTEM ENHANCEMENT FOR 2024 CENTER COOLED TOURING MODELS TOURING MODELS. PURPOSE: Revision (A). Updated: Part Numbers, Part No. 62800073 is obsolete. 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.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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