# Service bulletin M1644

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.

- Type: Service bulletin
- NHTSA id: 11001304
- Published by NHTSA: 2024\-06\-07
- Manufacturer's number: M1644
- Manufacturer's date: 2024\-05\-02
- Campaign id or software version: V 16.3.8.2
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN; UNKNOWN OR OTHER; ENGINE

## NHTSA's summary

SERVICE BULLETIN M1644: BODY CONTROL MODULE \(BCM\) UPDATE: HARD START IN GEAR AND RIDE MODE FAULT. PURPOSE: This bulletin informs dealers that there is a Body Control Module \(BCM\) update available for: • 2023: CVO Street Glide \(FLHXSE\), CVO Road Glide\(FLTRXSE\) • 2024: Street Glide \(FLHX\), Road Glide \(FLTRX\), CVO Street Glide \(FLHXSE\), CVO Road Glide \(FLTRXSE\), CVO Road Glide ST \(FLTRXSTSE\) This update is to address a concern of Hard/No start while attempting to start a bike in gear while the clutch lever is pulled in. This update also addresses a Ride Mode fault after a quick ON/OFF/ON ignition cycle.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11001304-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11001304-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine, Transmission and driveline

## Vehicles listed

- 2024 HARLEY\-DAVIDSON FLHX
- 2023 to 2024 HARLEY\-DAVIDSON FLHXSE
- 2024 HARLEY\-DAVIDSON FLTRX
- 2023 to 2024 HARLEY\-DAVIDSON FLTRXSE
- 2024 HARLEY\-DAVIDSON FLTRXSTSE

JSON: [/v1/bulletins/11001304](/v1/bulletins/11001304)

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