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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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11032855
Published by NHTSA2026-05-20
Manufacturer's number9100781 Rev 1
Manufacturer's date2026-05-12
NHTSA componentUNKNOWN 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

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Vehicles listed
JEEP GRAND CHEROKEE2024, 2025, 2026
JEEP GRAND CHEROKEE 4XE2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
JEEP GRAND CHEROKEE L2024, 2025, 2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.