Two problems related to gasoline engine have been reported for the 1997 Toyota Avalon. The most recently reported issues are listed below.
While traveling about 35-40 mph oil light kept coming on and off. Engine stopped running. There were no prior warnings or noises or smell before engine locked up. Consumer had asked the mechanic for the old engine because it needed replaced, later the service manager told the consumer that the original engine could not go to the vehicle's owner.
Sludge engine.