Real owner reports filed with NHTSA (showing 5 of 11):
NHTSA report #11776372 · filed Nov 6, 2026
I am reporting recurring safety defects in our 2026 Jeep Grand Cherokee Limited Reserve, delivered XXX. Since delivery, it has exhibited severe bucking, jerking, rough running, unexpected surging, hesitation, and failure to accelerate when I press the accelerator. Before delivery, [XXX] Jeep replaced four main-chamber spark plugs on XXX, at only 4 miles (RO #104686). At approximately 1,400 miles, Douglas Jeep found excessive oil or unburned fuel on the plugs and replaced all eight (RO #XXX), without explaining or correcting the underlying cause. On XXX, at approximately 1,181 miles, the engine stalled completely after a jolt shifting from reverse to drive. On XXX, it nearly stalled at 25–30 mph near [XXX] and [XXX] with our granddaughter aboard. On XXX, it nearly stalled at approximately 45 mph on [XXX]. On XXX, at approximately 60 mph, it hesitated sharply and jolted, feeling as if it might stall. Also on XXX, in approximately five miles of stop-and-go traffic moving 5–10 mph, it repeatedly bucked, jerked, surged, and failed to accelerate normally, bringing us dangerously close to vehicles ahead. Forceful jolts pushed us hard against our seats. The Jeep was at Douglas Jeep XXX . The symptoms persisted after repair. On XXX, its service order recorded “chug and buck,” with no correction available. On XXX, the service director attributed the behavior to “atypical throttle engagement,” although incidents continue. The SOS/ASSIST system also repeatedly fails to connect; on XXX it displayed “Feature not active,” and the sheriff’s department contacted us about 15 minutes later. These frequent failures could leave us unable to summon help after a crash or breakdown. We request NHTSA investigate possible engine/powertrain defects, repeated plug fouling, stalling/loss of propulsion, and emergency-call failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA report #11774720 · filed Oct 30, 2026
Since car was 2 days old, you would have to stop short of a stop sign or parking spot because the transmission would lunge up to 30 feet. Then once that happened, you could pull up to the stop or parking spot or whatever. Took it to the dealership and they acted like I was nuts. Got bad enough at 4900 mi, I told the service manager to drive it home. She called me and said it needed a new transmission and had put in with Jeep for a replacement. Jeep was contacted and they offered to replace the car under a trade in assistance program. Replacement car was found and at last possible minute, they cancelled the assistance. Went to dealership with my car and was told the factory engineer went to another dealership and that transmission also slipped and mis shifted. Told tech to open a 2nd star case about the engineering defect. Car is still at dealership. This is a safety issue with no answer. I have a disability and do not know what kind of stop to expect. Stellantis case 98378921 Star case They refused to give me number.
NHTSA report #11772918 · filed Oct 22, 2026
NEW SAFETY INCIDENTS – [XXX] – PREVIOUS COMPLAINT ON FILE I am reporting additional serious safety concerns involving my 2026 Jeep Grand Cherokee Limited Reserve, purchased new on [XXX]. Since purchasing this vehicle, I have experienced repeated bucking, jerking, rough engine operation, hesitation, loss of power, and stalling. On [XXX], the vehicle completely stalled. On [XXX], it nearly stalled while traveling through a busy intersection with my granddaughter in the vehicle. The vehicle was at Douglas Jeep for approximately 24 days, from September 23 through October 16, 2026. The dealership replaced all eight spark plugs after discovering excessive oil or unburned fuel contamination on the plugs. Despite these repairs, the dangerous drivability problems continue. During a recent test drive, Douglas Jeep General Manager John Grupe personally experienced the vehicle bucking and jerking at low speeds. On [XXX], I experienced additional concerning vehicle movement. After shifting into reverse while backing out of my driveway, the Jeep moved backward at approximately 4–5 mph without my foot pressing the accelerator. When shifting into drive, the vehicle also moved forward without accelerator input, reaching approximately 5 mph and maintaining that speed until I applied the brakes. I recorded video evidence of these incidents. The vehicle continues to buck and jerk severely at low speeds, including while maneuvering, turning, and driving through parking areas. I am particularly concerned about pedestrians, children, and other motorists. Despite multiple repair attempts and approximately 30 days out of service, these problems remain unresolved. I have repeatedly notified Stellantis and the dealership about the continuing safety concerns. I am requesting that NHTSA document these new incidents in connection with my previous safety complaint and evaluate whether these recurring drivability problems represent INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA report #11773028 · filed Oct 22, 2026
While driving approximately 65-70 mph on a highway, my 2026 Jeep Grand Cherokee 4x4 with approximately 15,000 miles suddenly jerked to the right and a loud knocking/clunking noise was heard from the drivetrain area. Immediately afterward, vehicle performance decreased significantly and the vehicle struggled to accelerate. The sudden loss of power at highway speed created a safety hazard due to surrounding traffic. No warning lights or messages appeared. The condition persists and the vehicle continues to have acceleration problems. This was very unsafe because either myself or other couldve been injured. I called jeep and they told me to drive it in to the Dodge dealership in Andrews TX, I want to emphasizes this is very unsafe, because it wont accelerate as it should. I have to drive down a road that oil tanker semis drive on as well.
NHTSA report #11771997 · filed Oct 19, 2026
"I am filing this supplemental report to provide critical new technical information regarding a 2026 Jeep Grand Cherokee Limited Reserve. This vehicle has experienced recurring engine instability, including rough idling, jerking, bucking, and loss of power. Most critically, on September 22, 2026, the vehicle nearly stalled while traveling 25–30 mph through a busy intersection, creating an immediate and severe safety hazard. Following this incident, an extensive investigation by Douglas Jeep, Stellantis STAR technical assistance, and a manufacturer engineer revealed oil contamination inside the engine cylinders and on the spark plugs. This is a recurring issue; the spark plugs were replaced prior to the vehicle's delivery in August 2026 and were replaced again in October 2026. Despite the involvement of a Stellantis engineer, the manufacturer has failed to provide a diagnosis of the root cause of the oil contamination or a permanent repair. The vehicle has spent approximately 30 cumulative days out of service since August 17, 2026. I am reporting this as a systemic mechanical failure that poses a significant risk of sudden power loss during operation."