This issue has happened three times. I am on the highway going 70mph, the RPMs fluctuate, the headlights go out and then I lose propulsion/unable to maintain or increase speed. This is a safety concern as it has happened 3 times on the highway with no warning and limited time to pull over to safety. The dealership is unable to replicate the problem or diagnose an issue.

Car engine completely shuts down at highway speeds sudden loss of throttle/power at highway speed * RPM surging or erratic behavior * dashboard/light flickering * vehicle entering limp mode or shutting down * no-start condition afterward * then the vehicle “magically” works again later * dealership unable to reproduce it * sometimes no stored codes

Rear sunroof glass imploded spontaneously and shattered while driving

The thermostat failed causing the vehicle to go into a reduced power mode while climbing a hill with a trailer. The dealer has a technical service bulletin for this issue but the overheating can call engine damage or an accident when the vehicle has reduced power. There were no warnings on the cluster until the car was already in a protection mode and power had been reduced. The cluster coolant temperature gauge is slow to respond and not accurate.

NHTSA ODI COMPLAINT UPDATE — #XXX 2024 Jeep Grand Wagoneer L | VIN: [XXX] Date of Update: April 15, 2026 Current Odometer: 94,896 miles This is a formal update to my previously filed NHTSA complaint (ODI #XXX) to document new evidence, continued defect progression, dealer misconduct, and retaliatory conduct by an authorized Stellantis dealer following my complaint filing. DEFECT ORIGIN — 325 MILES FROM PURCHASE Stelantis’s own connected vehicle service history app confirms the electrical system defect was present from near-delivery. The complete documented service history for electrical system inspections is as follows: • February 19, 2025 — 325 miles — West Herr CDJR Orchard Park, NY — Electrical system inspection • February 24, 2025 — 326 miles — West Herr CDJR Orchard Park, NY — Electrical system inspection • March 11, 2025 — 357 miles — West Herr CDJR Orchard Park, NY — Inspect electrical system, vehicle inspections • March 21, 2025 — 779 miles — West Herr CDJR Lockport, NY — Vehicle inspection, electrical system • April 1, 2025 — 3,297 miles — West Herr CDJR Lockport, NY — Electrical system, vehicle inspection • July 16, 2025 — 32,830 miles — Dave Warren CDJR Jamestown, NY — Electrical system • July 23, 2025 — 33,406 miles — Dave Warren CDJR Jamestown, NY — Electrical system x2 • October 14, 2025 — 55,702 miles — Dave Warren CDJR — Diagnostic system test This vehicle required electrical system inspection at 325 miles — within weeks of purchase. The root cause water intrusion defect has never been identified, sealed, or permanently repaired across more than a dozen dealer visits spanning 18 months. DEFECT PROGRESSION — SUMMARY • Water intrusion on left side of vehicle destroyed: LED driver module #68590086AD, wiring harness connector (NEVER REPLACED), original battery, Uconnect/TBM module, BCM • Vehicle died mid-route with medical passengers on board — March 23, 2026 • New headlight assembly installed April 3, 2026 — moisture visible INSIDE INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOI