 This is my second Santa Fe, my first was the 2007.  This one has a thumping sound when the gas tank isn't full.  I've taken it back twice for repair, am told there is no repair that is only happens on this size engine.  However my loner was a smaller engine and it does the same thing when driving. Beware, this is a new problem with the 2010's.  After two attempts to fix it, there is no fix.  I was told I'd have to drive it that way. This is my last Hyundai.  I'm so sorry, because I love the style and comfort. 