One problem related to manifold/header/muffler/tail pipe has been reported for the 2018 Ford Explorer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Ford Explorer based on all problems reported for the 2018 Explorer.
When accelerating we can smell exhaust in the cabin of our vehicle. This has been an ongoing issue for more than a year. We have to roll the windows down to get air. On trips from phoenix to san diego thru the mountain passes we have gotton dizzy from exhaust smell. I have taken it to the dealer 4+ times to complain about this issue, dealer has said its a known issue with no fix. You can smell the humidity of the exhaust as well as the burnt oil. Every time I get in my vehicle with friends, I'm embarrassed of smelling exhaust and hope it doesn't affect health of anyone. We can see the exhaust soot building up along the engine block and exhaust manifold but the dealer told us thats normal road grime.