2021 Jeep Grand Cherokee: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 143 owner complaints for the 2021 Jeep Grand Cherokee that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11770597 (filed 10/12/2026): “Vehicle: 2021 jeep grand cherokee overland, 3.6l v6 incident date: [xxx] location: [xxx] safety complaint: on [xxx], while driving my 2021 jeep grand cherokee overland on [xxx], the vehicle suddenly lost accelerator response while traveling on the highway. the engine initially remained running, b…”
- NHTSA complaint ODI #11759412 (filed 08/25/2026): “Final drive control module, transfercase control module went out. causing “service 4wd” message check-engine/mil light 4wd system becoming unavailable trouble codes related to the drivetrain control module intermittent 4wd problems speed issues…”
- NHTSA complaint ODI #11744034 (filed 06/14/2026): “I had stopped at a red light and the auto start/stop turned off the car. it would not restart. the fault caused it to stay in park and could not get out of park to move vehicle. this not only caused a road hazard but made me and others unsafe. the cause was a enclosed fuse box that made batteries go…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
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