Millions of other SUV’s have exhaust tips in the same location as the Explorers’. The smell (plus CO) is coming from under the hood, and being sucked into the interior through the ventilation system. Ford is dancing around, not telling the real truth about the source! PEOPLE- these are newer cars with stainless steel exhaust systems! I still have the original, no-rust system on my ‘05 with 180k on it! I suspect the real problem is cracked exhaust manifolds, which are not cheap, nor easy to replace....just another manufacturer taking the easy way out!