# Service bulletin C2053D

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: 10190742
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: C2053D
- Manufacturer's date: 2021\-03\-11
- NHTSA component: EQUIPMENT

## NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISX12 CM2350 engines with an improved Selective Catalytic Reduction \(SCR\) Catalyst. For the MY2013 engines, a calibration update will be required. This is an update to a previously submitted communication.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190742-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190742-9999.pdf)

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

## Components

Equipment and accessories

## Vehicles listed

- CUMMINS ISX12

JSON: [/v1/bulletins/10190742](/v1/bulletins/10190742)

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