After reading one of your other posts I've noticed that your passport was purchased used, as was mine. In Canada all used cars are sold with a CARFAX history report that discloses if the vehicle was involved in an accident. I'm wondering if your dealer disclosed any information on that? This might be the case with your Passport. It could also be a flaw in the production metal from the factory. If so Honda would have to make this right. The Unibody should not have cracks in it, especially near the pinch seam that bonds the body together.