The JL is the most refined Wrangler ever built — better on-road manners, improved fuel economy, a turbo four-cylinder option, and an available diesel. But no Jeep is problem-free, and the JL has its own growing list of known issues.
A frightening and well-documented issue: the JL's engine can stall without warning while driving, sometimes failing to restart immediately. Both the 2.0L turbocharged engine and 3.6L Pentastar are implicated. Multiple NHTSA complaints and software TSBs have been issued.
JL owners report water entering the cabin from multiple points: the soft top, hardtop seams, windshield frame, door corners, and even the footwells. Chronic leaks can cause mold, electrical damage, and wet carpet.
The optional eTorque mild-hybrid system has generated numerous complaints regarding failure, unexpected power loss, and battery management module issues. When it fails, it can leave the Jeep in a limp-home or no-start condition.
The 8.4" Uconnect 4C system can freeze, reboot spontaneously, lose pairing, or fail to connect to CarPlay/Android Auto. It's a software-heavy system that struggles with stability across model years.
The 2.0L turbocharged four-cylinder has reports of higher-than-expected oil consumption, particularly in early production units. Some owners report consuming a quart every 2,000–3,000 miles.
The 8HP75 8-speed automatic can exhibit a shudder or vibration at light throttle during low-speed cruising — particularly when the torque converter lockup clutch engages around 25–45 mph.
The 3.0L EcoDiesel brings excellent torque and fuel economy but comes with diesel-specific headaches: DPF clogging in city-driven vehicles and DEF system faults generating check engine lights.
The JL's large windshield is prone to cracking from minor stone chips. The original factory glass has a reputation for being thinner and more crack-prone than aftermarket replacements.
While the JL's suspension geometry improvements reduced death wobble vs. the JK, it's not eliminated — especially after lift kits are installed without corresponding corrective components like a heavy-duty adjustable track bar.