Soooo the little casing came apart or the top with a dickfer came off the bottom cap section? Because the cap is just a cap with the sensor on it. Your description makes it sound like the actual sensor came apart. To make you feel better, I'll say.. if it did.. it was likely going to fall apart anyhow.. (feel better?). Just get another if you think it's questionable. They are all over the place at the junkyard.