The FIRST time this happened, was right after the warranty ran out; stepped on the gas to pull into heavy traffic and nothing happened. LSS, the dealer had to replace the mass airflow meter (I think that's what it's called). Since then, the engine idles at really low levels some times, almost to the point of stalling and I've had the meter replaced two additional times (the car has 117K miles now). I've always bought Toyota's, this was the first time i bought a first model year, clearly that was a mistake. I'm really disappointed.