Jeep Grand Wagoneer Problems — All Years, Common Issues & Reliability

The contact owns a 2024 Jeep Grand Wagoneer. The contact stated that while driving approximately 35 MPH, the vehicle unintendedly shut off. The vehicle failed to immediately restart. After restarting the vehicle, the vehicle operated normally for a short while before erroneously shutting off a second time. The contact stated that during the failure, another vehicle almost crashed into the rear of the vehicle, and the vehicle failed to immediately restart. Additionally, while operating the vehicle, the instrument cluster malfunctioned and started pixelating, making the screen unreadable. During the failure, the contact was unable to view the safety information, and the lane departure feature was inoperable. The vehicle was later towed to the local dealer. The cause of the failures was not yet determined. The manufacturer was notified of the failure. The failure mileage was 35,000. The VIN was not available.

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 (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2022 Jeep Grand Wagoneer. The contact stated that while driving at an undisclosed speed, the front passenger seat had inflated without a passenger seated in the seat. No warning light was illuminated. The front passenger seat failed to deflate. The vehicle was taken to the dealer; however, the vehicle was not yet diagnosed or repaired. The manufacturer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 80,500.

While driving the breaks faultered and I had to slam on the break. I had to press all the way down on the break pedal to slow down or stop. Also when stopped at a light the car turns off and puts itself in park. I had to turn the car off and back on again to fix it. My safety and the safety of others was at risk due to chance of a significant car crash due to faulty break system. I had a near miss accident due to this reason. I will be calling the car dealership to tow the car to have it inspected. The ABS light came on as well as check engine light. Service power steering light also came on.

The contact owns a 2025 Jeep Grand Wagoneer. The contact stated that while the vehicle was parked, her grandson was exiting the vehicle from the second row of seats on the driver's side, he accidentally activated the fold-down feature of the seat. The seat folded over and trapped the child's head between the seat and a TV screen located on the back of the driver's seat. The contact stated that the seat stopped folding when it encountered resistance from the child's body. The contact manually pulled the seat back off the child's back. The contact stated that the child was shaken up but not hurt. The manufacturer was not informed of the failure. The failure mileage was approximately 8,000.

This situation is similar to the recent Palisade SUV recall: The seat folding system operates when the button is pressed, even if the seat is occupied. The system does not detect the presence of a seated passenger and allows the seat to fold in both 2nd and 3rd rows. The system lacks sufficient anti-pinch protection. The motor does not stop when encountering resistance, such as a person, child, or pet, and continues folding despite obstruction. I am in the process of making the complaint with the Jeep Customer Support which directed me to Jeep local dealership to do the investigation. The inspection is not performed yet.

2024 Jeep Grand Wagoneer L Obsidian. Water intrudes into the left headlight assembly through a defective seal, destroying the LED driver module (OEM part #68590086AD) and burning the internal wiring harness connector. This has caused: (1) complete headlight failure while driving in winter conditions with passengers; (2) sudden loss of engine power while in operation; (3) battery failure with standing water found under the battery on the left side; (4) Uconnect/radio/antenna/telematics failure (case open since 30,000 miles, unresolved). All failures traced to the same left-side water ingress point. Jeep Case #94993514 and Wagoneer Connect Case #94079691 both open and unresolved for 18+ months. Vehicle used for licensed medical patient transportation. Multiple roadside assistance calls. Total losses approximately $10,000.

The upper trim on the rear passenger window came off unexpectedly, which could have caused a safety hazard if it hit another car or a person.

- Comfort Control Module (CCM) for driver's seat and passenger seat. - Malfunction/failure of CCM caused seat lumbar/bolsters to automatically overinflate beyond maximum with no response from seat controls. - On or about 11/07/25, passenger seat back lumbar automatically overinflated beyond maximum, while passenger was seated, causing passenger to be pushed forward against seat belt. Overinflation caused seat back panel to bulge out as well. Seat would not respond to controls to deflate lumbar. Pulled vehicle over so passenger could unbuckle and seat themselves in rear seat. Immediately inspected by local dealer/service center on 11/10/25. CCM was replaced under warranty (34,453/36,000 miles) and have not experienced issue since. - On 02/17/26, driver seat back thigh bolsters automatically inflated beyond maximum while driver was seated, causing driver to shift in seat due to bolster digging into hip and thigh. Overinflation caused clip securing seat cover to cushion/frame to become detached as well. Seat would not respond to controls to deflate lumbar. Other seat controls began inflate/deflate automatically. Immediately inspected by local dealer/service center on 02/19/26 and was told module needed replacement outside of warranty (42,000/36,000 miles) to the cost of $1,573.83.

The front passenger seat lumbar/massage system malfunctioned and inflated without user input to maximum capacity. The lumbar air bladder became over-pressurized and created a large, hard, immovable bulge in the center of the seatback. The system will not properly deflate and remains in this condition. The failed component appears to be the lumbar/massage module and valve system, which is electronically controlled. The vehicle is available for inspection upon request. This condition creates a rigid protrusion directly behind the occupant’s spine. In the event of a crash, this would alter occupant positioning, concentrate force on the spine, and interfere with proper restraint function and airbag performance. This will increase the risk of injury to the occupant. The problem has been confirmed by Lander’s Jeep dealership in Little Rock, AR, which acknowledged the issue but advised that diagnosis and repair would be costly and would not be covered under my warranty or extended service contract provided by MOPAR. No warning lights or messages appeared prior to the failure. The issue occurred suddenly during normal use. Online research shows countless similar failures in 2022+ Jeep Grand Wagoneer vehicles, with consistent reports of lumbar/massage module or valve failures causing uncontrolled inflation. Some owners report repeat failures and electrical issues related to the seat module. Given the repeated nature of this failure across multiple vehicles and the potential safety implications, this issue should be investigated as a possible safety defect affecting occupant protection systems. I have multiple more examples of this from Facebook Wagoneer and Grand Wagoneer Owner groups, however I am limited to just 10 uploads.

Rear climate control system fails to provide cooled air to the second and third rows during normal vehicle operation. Front vents produce cold air while rear vents blow warm to hot air despite temperature settings at minimum, high fan speed, and recirculation enabled. The condition has been present since vehicle delivery and has persisted despite three repair attempts by an authorized dealership. The problem has been reproducible under both driving and idle conditions. Independent measurements using a probe-based temperature instrument inserted into the vents confirm a significant difference between front and rear discharge temperatures. After approximately 25 minutes of driving in moderate weather (about 72°F ambient), front vents measured approximately 42–44°F while second and third row vents remained approximately 72–86°F. In warmer conditions, rear vent temperatures have exceeded 90°F. Adjusting the front climate control to a normal comfort setting causes rear temperatures to rise further even when rear controls remain set to maximum cooling. The vehicle is a three-row family SUV. The failure exposes rear passengers, including a toddler in a rear-facing car seat, to elevated temperatures during normal driving, particularly in hot and humid southern Louisiana conditions. Young toddlers are more vulnerable to heat exposure and cannot easily regulate internal body temperatures themselves, increasing safety concerns. The defect substantially limits safe and practical use of rear seating areas and remains unresolved despite repeated service attempts. No warning indicators are provided to the driver that rear cooling is inadequate. The condition reduces the vehicle’s ability to safely transport passengers in rear seating positions during hot weather. The vehicle manufacturer, Stellantis N.V., has been formally notified of the condition and is aware of the issue.