# Service bulletin 43\-083

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: 11030930
- Published by NHTSA: 2026\-04\-07
- Manufacturer's number: 43\-083
- Manufacturer's date: 2026\-03\-21
- Campaign id or software version: 43\-083
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Exhaust Stack Isolators \- Early wear of the polyurethane exhaust stack isolators may occur on certain Kenworth chassis due to excessive heat. Early wear of the polyurethane exhaust stack isolators may occur on certain Peterbilt chassis due to excessive heat.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030930-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11030930-9999.pdf)

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

## Vehicles listed

- 2024 to 2026 KENWORTH T680
- 2024 to 2026 KENWORTH T880
- 2024 to 2026 KENWORTH W990
- 2024 to 2026 PETERBILT 567
- 2024 to 2026 PETERBILT 579
- 2024 to 2026 PETERBILT 589

JSON: [/v1/bulletins/11030930](/v1/bulletins/11030930)

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