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The embattled Japanese manufacturer's new Lexus GX460 will be suspended from sale in the US while Toyota conducts tests.
The 4x4 was branded a "safety risk" by Consumer Reports, which cautioned readers not to buy the vehicle – the first time in nine years it has issued such a warning.
Consumer Reports warned readers that in tests the rear end of the 2010 model of the GX460 "slid out until the vehicle was almost sideways before the electronic stability-control system was able to regain control".
"In real-world driving, that situation could lead to a rollover accident, which could cause serious injury or death," the article continued.
Consumer Reports is one of America's most trusted publications and is in many ways similar to Which? in the UK. Around 5,000 GX460s have been sold in the US since it was launched three months ago. The suspension adds to Toyota's problems, coming hard on the heels of the recall of more than 8.5m cars as a result of safety concerns surrounding over-acceleration and braking.
"At this time we have asked our dealers to temporarily suspend sales of the 2010 GX460," Toyota said in a statement. "Lexus' extensive vehicle testing provides a good indication of how our vehicles perform and we are confident that the GX meets our high safety standards."
Toyota was last week fined $16.4m (£10.7m) by the US Department of Transportation over delays in issuing recalls to customers. Ray LaHood, the Transportation Secretary, called the auto company "safety deaf".
2010 Lexus GX 460.
Japanese auto maker Toyota is to temporarily suspend sales of its luxury Lexus GX 460 SUV following an unfavorable verdict from ''Consumer Reports'', which concluded ''"Don't Buy: Safety Risk,"'' the first such warning in almost a decade.

After conducting its standard emergency handling tests on the 2010 version of the Lexus GX 460, ''Consumer Reports'' became concerned that the rear of the vehicle had a tendency to slide out, which in real life situations could lead to rollovers. However, the consumer organisation is also unaware of any such incidents with the 5000 GX 460s sold since its launch three months ago.

Already embattled with ongoing safety issues with its vehicles, Toyota has been quick to act, though it did claim that the car was safe to drive and that it had passed internal safety standards. According to Toyota, "Lexus' extensive vehicle testing provides a good indication of how our vehicles perform and we are confident that the GX meets our high safety standards."