Why does a knock sensor fail?

A knock sensor can fail due to a variety of reasons, including exposure to high heat or vibration, which can damage its internal components. Additionally, electrical issues such as short circuits, corrosion, or faulty wiring can impair its functionality. Over time, wear and tear from engine operation may also degrade the sensor's ability to accurately detect knocking. Lastly, contamination from oil or other fluids can disrupt its operation, leading to failure.