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Service bulletin M1537

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 id10202125
Published by NHTSA2021-10-07
Manufacturer's numberM1537
Manufacturer's date2021-09-22
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT

NHTSA's summary

SERVICE BULLETIN M1537: 2021 SPORTSTER S - INITIAL CARE. PURPOSE: Revision. The purpose of this program is to monitor Harley-Davidson quality delivered to the customers and assist dealers with diagnostics and support on this newly released motorcycle. Harley-Davidson Technical Service is providing an Initial Care program for 2021 Sportster S vehicles. Harley-Davidson is asking dealers to provide information on the parts listed in Table 2 to Technical Service within 24 h of a customer concern. The goal is to provide diagnostic support and a rapid resolution that enables Harley-Davidson to have the customer back on the road within 72 h. Duration of Program: September 20, 2021 to December 20, 2021. Motorcycles Affected: All 2021 Sportster S (RH1250S) vehicles

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

Engine, Equipment and accessories, Transmission and driveline, Automatic transmission

Vehicles listed
HARLEY-DAVIDSON RH1250S2021

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