I am in the market for a 2002-2004 Grand Cherokee 2WD 6 cyl (4.0). Are there any issues in these models that I should look for? Some of my friends warned me about wiring issues caused by the harness(?). Should I consider the V8? Seen a number with bad motors. I have found many with mileage from 80K to 120K. I only drive 12K per year so this vehicle will last me quite awhile. Thanks in advance for your opinions.