Hi, I have a 2003 Accord and my engine light was on so I took it to the Honda dealership. They just told me that I have rodent damage. The rodent chewed through the knock sensor and I supposedly need to get a new one. He quoted me $400. He said the part is cheap, but the labor is the majority of the price. Does this sound reasonable? Is he messing with me. Should I bite the bullet and pay to have them fix it? Your advice is much appreciated