2021 Jeep Grand Cherokee L electrical system problems

“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…”

“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 NHTSA 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…”

“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.”

“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.”

“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.”

“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.”