Two problems related to radiator have been reported for the 2018 Jeep Wrangler. The most recently reported issues are listed below.
Began smelling coolant (sweet smell), although could not find leak. At 15,600 miles (may 2020), vehicle was brought to Jeep dlr for service. Found small cracks in the plastic portion of the radiator. Now, at 18,600, the sweet smell is back. Will need to take it back in to Jeep dlr again.
Radiator leak (failure). Jeep dealer confirmed and repair is in process.