# Service bulletin 9100781 Rev 1

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: 11032855
- Published by NHTSA: 2026\-05\-20
- Manufacturer's number: 9100781 Rev 1
- Manufacturer's date: 2026\-05\-12
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Issue: complaint of rattle from exhaust Before replacement: Check for loose exhaust Aluminum isolator brackets \(check if the bracket is movable by hand/bolts not fully fastened to the vehicle\). If loose, tighten and check to see if the rattle is still present. Check clearances between exhaust components and isolators brackets, as well as other parts of the vehicle. If the hanger braces \(additional rods welded to the hanger rod for strengthening\) are bottomed out on the isolator, loosen the clamps joining the catalytic\-side and muffler\-side systems and slide the muffler side exhaust back 5mm. Take care not to damage the system, do not use a hammer to break the muffler side free. Re\-tighten and check for rattles again. If the rattle is still present, replace the system.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032855-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032855-9999.pdf)

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

## Vehicles listed

- 2024 to 2026 JEEP GRAND CHEROKEE
- 2024 to 2026 JEEP GRAND CHEROKEE 4XE
- 2024 to 2026 JEEP GRAND CHEROKEE L

JSON: [/v1/bulletins/11032855](/v1/bulletins/11032855)

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