One problem related to catalytic convertor has been reported for the 2007 Jeep Wrangler. The most recently reported issues are listed below.
Expereince very loud and noisy exhaust manifolds, dealer found both intake manifolds to be defective and leaking , warrenty repair and replaced both. #2 leak found in power steering, dealer stated leas in lines, rack , and pump, warretny on all but the lines,#3 also found catalytic convertor leak, recommend replacement (again happens to be under warrenty) #4 found small hole in intermediat pipe, recommended replacement . #5 looking further dealership found cylinder head to be leaking!!!!!!!!!!!!! and yes, covered under warrenty. Now I am beginning to wonder about this dealership, as I have never used them before not did I but the Jeep from them. . #6 tech stated some wear in all ball joints , recommended replacement . #7 found steering damper to have a leak, recommended replacement, now as anyone can se there seems to be many issues related to my 07 jk.