One problem related to engine rattling and whining sounds has been reported for the 2008 Toyota Prius. The most recently reported issues are listed below.
The contact owns a 2008 Toyota Prius. The contact stated that while driving 15 mph, he heard a rattling noise coming from the engine. The contact pulled the vehicle into a parking lot and noticed that there was to puddle of oil under the vehicle. The vehicle was towed to the dealer for inspection where they stated that there was a hole in the engine pan . The manufacturer was notified and stated that they had to review the case with the dealer. The failure mileage was 60,000. Updated 07/26/12.