As of Thursday morning, however, Toyota had not alerted US safety regulators of a recall of Toyota and Lexus models for possible engine stalling while driving.
No accidents or injuries have been reported in relation to the engine problems.
Toyota said that decisions by government regulators would determine if a recall was necessary in this instance for the eight models, which include the Lexus LS460 and Toyota Crown. The models involved have 3.6-liter and 4.6-liter engines.
This engine issue is just the latest in a series of safety issues that have been plaguing the world's top automaker since last September. The biggest issue to date has been one involving potential acceleration. To date, 7.3 million vehicles have been recalled in Toyota's largest market - the United States
