2024 Jeep Grand Cherokee L Problems: 5 Known Issues

On the 2021-2024 Jeep Grand Cherokee L, the Grand Cherokee L's eTorque mild hybrid system experiences 48V battery faults and stop/start malfunctions. The auxiliary battery loses charge capacity, causing the stop/start system to disable itself and triggering warning messages. The belt-starter-generator can also produce vibration during engine restarts.

On the 2021-2024 Jeep Grand Cherokee L, wL Grand Cherokee L owners repeatedly report a flat 12V battery after the vehicle sits for as little as several days. The root cause is a module that never enters sleep mode after lock-up, so residual current draw stays far above the roughly 30 mA that should remain about 30 minutes after locking. Owners and dealers have traced multiple distinct causes: an active ground fault in the rear liftgate exterior lock switch that repeatedly cycles the door locks and exterior lights, the connected-services/telematics box waking the vehicle to answer server pings, and modules left awake by incompletely debugged control-unit software. Note this is separate from the 48V eTorque battery fault - here the conventional 12V starting battery goes dead.

On the 2021-2026 Jeep Grand Cherokee L, the Uconnect 5 system in the Grand Cherokee L experiences frequent freezing, touchscreen lag, wireless CarPlay/Android Auto disconnections, and occasional black screen events requiring a hard reset.

On the 2021-2025 Jeep Grand Cherokee L, the Grand Cherokee L with the dual-pane panoramic sunroof is prone to water leaks caused by clogged or kinked drain tubes. The extended-length L model has longer drain tube runs than the standard Grand Cherokee, increasing the likelihood of blockage. Water pools in the sunroof channel and overflows into the headliner, dripping onto the front seats, center console electronics, and overhead console modules. The rear drain tubes are especially prone to clogging where they pass through the C-pillar.

On the 2021-2025 Jeep Grand Cherokee L, grand Cherokee L owners frequently see the adaptive cruise control and forward collision warning systems drop out with an "ACC/FCW Unavailable, Service Required" message, or find the FCW OFF telltale permanently illuminated and unclearable through the settings menu. The forward-facing radar sensor behind the lower grille is the usual culprit: it is low and exposed, so road debris impacts, a minor front-end bump, ice or heavy road grime knock it out of alignment or damage it outright. Related complaints include the system failing to warn or brake at all in owner-conducted tests, and conversely phantom auto-braking events during parking maneuvers and intersection turns. Compounding it, any front-end body or bumper work that disturbs the sensor requires an ADAS recalibration that many general shops skip.