2021 Jeep Grand Cherokee L electrical problems

Filed Oct 11, 2026 · Electrical, Suspension · TX

My 2021 Jeep Grand Cherokee L Overland has experienced repeated and escalating safety‑related failures involving the electrical system, telematics/SOS functions, powertrain components, and suspension. These failures have continued despite major warranty repairs and now pose a significant safety risk. Timeline of Defects: In August 2026 at ~52,276 miles, the vehicle required over $10,000 in repairs. Failures included: no A/C cooling, compressor and fan not engaging, evaporator leak, low refrigerant, and A/C clutch not activating. The driver seat cooling failed, the seat fan dragged, and both massage seat modules were shorted. The engine had an oil pan leak, idler and tensioner noise, and collapsed engine mounts. Immediately after these repairs, in September 2026, new electrical and safety issues began. Jeep Connectivity stopped working, purchased WiFi failed, and both the Assist and SOS emergency functions became inoperative. The vehicle displayed incorrect warnings (low oil pressure, low tire pressure) and experienced intermittent no‑start conditions requiring towing. Multiple system alerts appeared at once, suggesting BCM, gateway module, CAN‑bus, or telematics control unit malfunction. On October 5, 2026, I received a recall notice stating the rear suspension coils were installed backwards, affecting vehicle stability. No replacement parts are available, leaving the defect unresolved. As of October 2026 (~55,700 miles), the vehicle continues to experience telematics failure, electrical instability, incorrect warnings, and intermittent no‑start conditions. The loss of SOS/Assist functionality, combined with suspension defects and electrical instability, creates a serious safety hazard. I request the federal safety agency investigation into these systemic failures and the unresolved suspension recall.

Filed Sep 16, 2026 · Electrical, Lights · FL

My 2021 Jeep Grand Cherokee L experienced a complete failure of the passenger-side headlamp assembly at approximately 70k miles. The entire passenger-side headlamp became inoperative,not just one individual light. I received no headlamp out or exterior lighting warning on the instrument panel. At exactly the same time that the headlamp failed, the vehicle's odometer began flashing. Diagnostic scanning identified fault codes B22204-87 and U1222-00. Disconnecting the battery did not restore the headlamp or correct the flashing odometer. I am concerned because the federal safety agency Safety Recall 21V‑950 (FCA Campaign Y72) involved certain 2021 Jeep Grand Cherokee L vehicles and a Smart Lighting Module software condition that could cause one or both headlamps to become inoperative. I do not know whether this recall condition cause my vehicle's failure, but my symptoms appear similar to the condition described in that recall. I took my vehicle into the local jeep dealership for recall work and included the inoperable headlamp, they told me there was no recall and said I needed to replace the entire headlamp for $1800 or $185 for a system scan. I was not advised of any diagnostic trouble codes, Smart Lighting Module communication, or smart lighting module software status had been evaluated before the headlamp replacement was recommended. I was not informed of a possible software or module-related cause for the failure. Because the federal safety agency Safety Recall 21V‑950 (FCA Campaign Y72) addresses headlamp failure associated with Smart Lighting Module software on certain 2021 Jeep Grand Cherokee L vehicles, I am concerned that my vehicle may be experiencing a similar condition.

Filed Aug 14, 2026 · Driver assistance, Electrical · AR

A vehicle was purchased at McLarty Daniel Chrysler Bentonville, AR. The sales department had a third party install a non-oem windshield. Dealer attempted repairs, but the records show discrepancies of statements and record. The dealer ignored the instructions to recalibrate the windshield, though the receipt stated “elevated risk of collision” if not calibrated. The owner had on going issues that service should have connected to the windshield and calibration. The windshield of this vehicle has immense safety features that were ignored. The liability to willfully hand over the keys of a known unsafe vehicle is high. The dealership sent a repair request to warranty, only to be denied for “faulty or negligent install” then the service department said “long story short sales will cover the repair” after requesting formal warranty communications did the owner become aware on 7/30/26 and start the process of correction.

Filed Jun 26, 2026 · Electrical, Steering · NY

While my wife was driving our 2021 Jeep Grand Cherokee on [XXX] northbound in NY on the way with our children to school, she experienced a loss of steering as the wheel became almost impossible to turn. At the same time, the power steering light came on. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 21, 2026 · Electrical · AL

The passenger door does not alert when opening or close . The tbm module does not update causing a fee of $198.95

Filed May 14, 2026 · Electrical, Engine · TX

My AC compressor and condenser have stopped working without any reason. The air conditioner does not work at all, it does not make the air cold and the heat in [XXX] is lethal. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 4, 2026 · Driver assistance, Electrical · PA

In May 2025 the vehicle randomly, and without warning, the instruments, gauges, and displays switched to Italian, changed to Metric, and we got the update and FCW Off light stuck on. Numerous other settings had been reset. Took to dealer and had to pay for the fix - they noted a STAR bulletin on my invoice. Then this past weekend (May 2, 2026) it happened again. At least this time it didn't go Italian and Metric on me, but lots of other settings were changed. Did not test the paddle shifters but will do that soon. Current software version says FCA-MY24.U29.42-PROD. I've seen other posts with a newer version - not sure if / why not on my Jeep yet.

Filed Apr 1, 2026 · Brakes, Electrical · NC

Vehicle: 2021 Jeep Grand Cherokee L Issue Type: Electrical System / Loss of Power / Braking System While operating my 2021 Jeep Grand Cherokee L on Interstate 40 at approximately 70 miles per hour, with two minor children in the vehicle, the vehicle suddenly and without any prior warning began to rapidly decelerate, despite continued pressure on the accelerator pedal. At the time the deceleration began, there were no warning lights, alerts, or indications of any malfunction. The vehicle exhibited a significant loss of power, and it felt as though it was being mechanically restricted or “dragging,” severely limiting its ability to maintain highway speed. Only after the vehicle had already begun to decelerate did a brake system warning indicator appear on the dashboard. This sequence of events indicates that the warning system did not provide advance notice of the failure. This sudden and uncommanded deceleration created an immediate and serious safety hazard, particularly given the vehicle’s speed and surrounding interstate traffic. The inability of the vehicle to respond appropriately to acceleration input placed occupants at risk of a rear-end collision or other serious traffic incident. Although the warning indicator later turned off, the vehicle continued to operate abnormally, with ongoing reduced acceleration and diminished responsiveness. This incident occurred without prior warning, and the delayed activation of the brake warning indicator raises serious concerns regarding a potential defect involving the vehicle’s electrical, braking, and/or powertrain control systems, including possible failure of system monitoring or alert mechanisms. Given the circumstances including highway speed, sudden loss of propulsion, delayed warning notification, and the presence of child passengers. I respectfully request that this issue be formally investigated as a safety-related defect.

Filed Mar 30, 2026 · Electrical, Transmission · MD

At 78,800 my truck started experiencing "stuttering" trying to pick up speed like the transmission wouldn't shift into gear and the Uconnect stopped working simultaneously. Also seems to be burning through more oil. It happens every single time you take off from a stop until the vehicle finally shifts into gear, it's very scary and very dangerous when you're trying to merge onto a beltway and you can't pick up speed correctly.

Filed Mar 10, 2026 · Airbags, Electrical · FL

I am reporting a failure of the Steering Column Control Module (SCCM) in my 2021 Jeep Grand Cherokee L Overland. The failure is manifesting as an error message saying "service transmission" and the code that it is throwing says that the paddle shifters are overheating. This component is identical to the modules currently under Safety Recall 36B (the federal safety agency 24V‑199) and Equipment Recall 15B (the federal safety agency 24E-025). The manufacturer has admitted that these modules possess an internal weld defect that prevents the driver’s side airbag from deploying in the event of a crash. Despite the clear safety risk and the fact that this model year/body style (WL) is the primary population for this defect, the manufacturer (Stellantis/Jeep) refuses to cover the repair, stating my specific VIN is not "flagged" in their internal database. I am concerned that the scope of the existing recalls is too narrow and that my vehicle is currently being operated with a non-functional or unreliable driver's airbag system due to this known hardware defect. I am requesting an investigation into why 2021 Grand Cherokee L models with these exact symptoms are being excluded from the safety remedy.