It's not a great sign when Ford recalls its most important product, but here we are.Nobody wants to hear the word "recall." Most will immediately imagine some of the worst recall debacles in automotive history, but the truth is there are many, many recalls throughout the industry constantly. Unfortunately, it's a part of the automotive industry, a big part even. Let's take a look at Ford Motor Company's (F 2.54%) recent recall and what it means for investors.Bread and butterWhen it comes to profitable produ ...