One problem related to engine clicking and tapping noises has been reported for the 2010 Toyota Prius. The most recently reported issues are listed below.
Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6) I need to bring our 2010 Prius back-in. The last time [xxx] with a "y" worked on the rattle in the dash. He was able to fix that but now only in the cool mornings there is a popping sound coming from the dash. Please contact me as to when he can work on it again. It is very important that it be done first thing in the am. Car needs to be cool! I am sure if left in the sun it will not do it. If needed I can bring car in first to show problem and car can stay over night again if need. I know Toyota has a quality problem in this area, I will report it to Toyota mfg. & dot under other. Looks like other Prius have this same problem. . . [xxx]2010 Toyota Prius [xxx] color: blizzard pearl selling dealer: [xxx].