One problem related to engine failure has been reported for the 2005 Mazda RX8. The most recently reported issues are listed below.
The contact owns a 2005 Mazda Rx8. While driving 10 mph, the vehicle shut off without warning and was unable to be restarted. The vehicle was towed to the dealer and they stated that there was internal engine failure. The engine had low compression. The vehicle is currently being repaired, but the contact does not know who will pay for the repair costs. He is in the process of notifying the manufacturer. The failure mileage was 59,000 and current mileage was 61,000.