# Service bulletin CBR\-2591\-1 202606

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: 11034122
- Published by NHTSA: 2026\-06\-29
- Manufacturer's number: CBR\-2591\-1 202606
- Manufacturer's date: 2026\-06\-16
- NHTSA component: ENGINE

## NHTSA's summary

The purpose of this CBR it to provide release notes for the recent Engine ECU software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034122-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034122-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2023 to 2027 VOLVO VNL \(4\)
- 2025 to 2027 VOLVO VNR \(4\)

JSON: [/v1/bulletins/11034122](/v1/bulletins/11034122)

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