2020 Jeep Gladiator: engine failure

Filed May 29, 2026 · Engine · FL

On May 27, 2026 at approximately 11:00 PM, my 2020 Jeep Gladiator Overland (VIN: [XXX] ) suffered catastrophic engine failure during normal operation at 78,190 miles. The alternator seized, causing the harmonic balancer (crankshaft damper) to fracture. The broken balancer fell into the engine block, causing extensive internal damage requiring complete engine replacement at significant cost. This failure sequence points to a design and/or manufacturing defect in the OEM alternator and/or its mounting system on the 3.6L Pentastar V6. A properly designed alternator should not seize with enough force to fracture the harmonic balancer and deposit debris into the engine block under normal operating conditions. The vehicle was not involved in any accident or operator abuse. It was being driven normally with no prior warning — no dashboard lights, no unusual sounds, no prior related mechanical issues. I request the federal safety agency investigate whether this failure pattern is systemic across 2020 Jeep Gladiator vehicles and other 3.6L Pentastar V6 platforms, including the Jeep Wrangler, Ram 1500, and Dodge Durango. Sudden complete engine failure at highway speeds is an immediate crash hazard to the driver and surrounding motorists. I respectfully request a formal defect investigation and, if warranted, a safety recall with full remediation and reimbursement of repair costs to affected owners. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 28, 2026 · Engine · NH

Engine failure due to coolant leak: in December, 2025, vehicle was towed to dealership due to overheating engine. While driving home from work, Vehicle was exhibiting engine overheating including temperature warning lights, temperature gauge fluctuating from normal to extremely high, a strange sound coming from the front of the vehicle (almost like a fan was not working) and running rough, like a diesel idle. I immediately pulled the vehicle off to the side of the road & shut it off. (Fortunately engine didn’t seize or exhibit these symptoms while I was on the highway just minutes before) I called dealership & they said it needed to be towed in. After having my vehicle for 10 days, Dealership stated thermostat needed to be replaced. Vehicle then exhibited same symptoms a few weeks later along with a check engine light, vehicle is returned to dealership. Dealership NOW tells me they’ve “seen enough of these to know that it’s most likely going to need a left side cylinder head” due to coolant leak into the engine. I am now aware there have been multiple reports to the federal safety agency for similar issues and that a service bulletin has been issued to the dealerships for this very reason: its a KNOWN issue with no recall in sight. Jeep at this juncture, acknowledging it’s a problem, REFUSES to assist with very costly repair, instead suggesting I should report to the federal safety agency.

Filed Nov 13, 2025 · Engine · IL

My vehicle has a 3.6 pentastar engine. Around 75,000 miles the check engine light came on. I took it to the dealership to run diagnostics and find the problem. After completing the diagnostics the service tech informed me that is was an issue related to a TSB 09-011-25. This is a major manufacturing issue that causes engine failure. My engine needs to be replaced. This issue affects many vehicles in the Stellantis lineup and should be a recall. They have not made any effort to inform customers of this issue to have it inspected

Filed Jul 27, 2025 · Engine · IL

To Whom It May Concern, I hope this message finds you well. I am writing to formally report a serious mechanical failure involving my 2020 Jeep Gladiator (VIN: [XXX] ), which recently experienced a complete engine lock-up without any prior warning signs. The vehicle is now inoperable. Given the severity of the issue, I am requesting a thorough review under the manufacturer’s 5-year/60,000-mile powertrain warranty, as well as an investigation into any applicable recalls or technical service bulletins (TSBs) that may relate to this failure. For your reference, I am aware of the following known issues tied to this vehicle model: Recall 21V‑028 – Clutch overheating and potential fire risk (manual transmission) TSB 18-024-21 – PCM software update and possible camshaft replacement (associated with Code: P0300) Notably, my vehicle exhibited no prior symptoms—such as loss of power, engine misfires, dashboard warnings, or burning odors—prior to the engine failure. I respectfully request the federal safety agency’s assistance in confirming: Whether my vehicle is currently subject to any open recalls or safety investigations Whether this type of engine failure has been reported by other 2020 Jeep Gladiator owners What recourse is available to owners under federal warranty or safety defect protections if the dealership is unable or unwilling to resolve the issue I can be reached directly at [XXX] or via email at [XXX] . I appreciate your time and urgent attention to this matter and hope we can find a swift and fair resolution. Sincerely, [XXX] VIN: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 11, 2025 · Engine · IL

To Whom It May Concern, I am writing to formally report a serious mechanical issue involving my 2020 Jeep Gladiator (VIN: [XXX] rienced a complete and unexpected engine lock-up. The vehicle is now undrivable and presents both a functional and potential safety concern. Prior to this failure, there were no warning signs—no engine misfires, loss of power, burning smells, or dashboard warning lights. The incident occurred suddenly and without any preceding symptoms. I am aware of several issues affecting this model year, including: Recall 21V‑028 – Involving clutch overheating and potential fire risk in manual transmission vehicles TSB 18-024-21 – Pertaining to PCM software updates and camshaft replacement due to engine misfire (P0300) While I understand that technical service bulletins do not carry the same weight as recalls, the combination of TSB-related concerns and my complete engine failure raises questions about broader mechanical reliability and consumer safety. I have reached out to the dealership (Napleton’s River Oaks CDJR) to request evaluation and warranty support under the 5-year/60,000-mile powertrain coverage. However, I am also submitting this report to the federal safety agency for documentation and investigation purposes, in the event this issue reflects a larger pattern affecting other vehicles of the same make and model. I respectfully request that the federal safety agency review this case and consider whether further investigation is warranted, particularly if other consumers report similar issues. Please feel free to contact me if additional information or documentation is needed. I can be reached at [XXX] or [XXX] k y [XXX] n t [XXX] ely, [XXX] Vehicle: 2020 Jeep Gladi [XXX] ] INFORMATION REDACTED [XXX] ] INFORMATION ACT (FOIA), 5 U.S.C [XXX] ATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 7, 2024 · Engine · NJ

The oil pump failed at 23,000 miles, then while traveling on [XXX] in New York, the engine failed at 48,000 miles. Fortunately we exited the freeway before a catastrophic failure could occur. The dealer was contacted and I was informed not to drive the vehicle, but to have it towed to the dealership. At the dealership they found the engine had a severe knock and informed me a complete new engine was needed. The engine was never taken apart for inspection, as they mentioned it would be at my expense, that of an additional $1800.00. The cost for engine replacement was $11916.16. If the engine seized on the freeway, a disaster could have occurred. Dealership stating the oil changes were over their recommendations. Four dealerships were contacted and all had different oil change intervals. Dealership stated the North East is a "severe service" area. The other three Chrysler dealerships never heard of this. Also the oil I ran was Amsoil full synthetic with the oil manufacturer recommending up to 12,000 miles oil change intervals, this dealer states 4,500 miles. Other dealers state "go by the book" of 7,500 to 10,000 miles, one states 6,000 miles, another states 6,500 mile intervals. A little long winded story, point being an engine failure traveling at highway speed could have caused severe, possibly life threatening results. My complaint is on the oil pump failure causing this problem, I base my case revolving around the oil pump failure causing engine oil starvation. The dealer states the engine was still getting oil. The oil pump is a two stage pump, low stage-40 PSI, high stage 80PSI. The high stage of the pump failed, not supplying enough oil to the top of the engine. If 40PSI was sufficient to maintain this engine, Chrysler would not have spent millions of dollars to develop a high pressure stage in this pump. Thank you for your consideration in this case. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 16, 2022 · Airbags, Electrical · PA

Ever since I got this vehicle it’s been a roller coaster. As I’m driving the vehicle home from the dealership the vehicle displays on the screen that it’s going to shut off. I pulled over immediately on the side of the road and the vehicle turned off while in drive at 0 MPH! I put my emergency signals on and waited 15-30 minutes before the car would let me turn it back on! I drove home and as soon as I’m pulling into the driveway the car literally shuts off in reverse with no signs foreshadowing this! It was so embarrassing. What a birthday surprise. I had to call triple A to come tow it back to dealership. They had to change battery. Which is about 1 hour away at least depending on traffic. Picked up the vehicle sometime that week. The beginning of the next week as I’m driving to work the vehicle displays on the dash that the engine is overheating! I notice the vehicle starting to smoke so I pulled over immediately. I missed work that day. I had to call another tow to the dealership. The manager said that the truck would be in the shop for a month at least because they have to order a new engine! They gave me a terrible rental. I got the truck back around a month later. Months go by random creaking occurs periodically. I go to the dealership and they say I need new ball joints. Item is on back order so they’ll let me know when it arrives. Months go by start/stop system doesn’t work anymore. I go to the dealership and they keep it for a few days and don’t end up fixing the problem but schedule an appointment for next month. Appointment comes and they fixed start/stop system supposedly but every now and then it stops working. Months go by airbag signal turn on. I go to the dealer and they said they fixed something but needed to order a part. I am waiting on their call for that part now as well. This has truly been a crazy experience. I would never recommend anyone to go to a Fred beans dealership like I made the mistake of doing. 70k for such a failure.

Filed Sep 16, 2020 · Engine · 112 miles · VA

Starting at just over 100 miles my vehicle started displaying a electronic start/stop systems errors and the check engine light came one. The cel was caused by engine misfires and show code p0300. I took the vehicle to the dealership and was told that fca was aware of the problem and it was well know, but no fix is available. The misfires cause engine stumble and inability to accelerate as expected when pulling out or crossing oncoming traffic. The federal safety agency may want to investigate as fca does not have an answer. This may be a defect in manufacturing or software and seems to be leading to outright engine failures for models with more miles. Photo attached showing the dashboard warnings that continue to occur.