A dent in the blue metal under the car hood, likely part of the vehicle's frame or a panel, is not necessarily "normal" but can happen due to impact, manufacturing imperfections, or wear over time. Minor dents might not affect performance if they don't interfere with components like wiring or hoses, which seem intact in the image. However, if the dent is severe or compromises structural integrity, it could be a concern. For an accurate assessment, I recommend consulting a mechanic. Would you like me to search for more specific information on this?