Two problems related to car stall have been reported for the 2007 Lexus IS250. The most recently reported issues are listed below.
Upon starting the car the car shook and got a vsc and engine check light. Called the dealer right away and they said they would have to charge 100 to see what happened. Come to find. Out after the fact there was a voluntary notice put out by Lexus on this issue which they have extended warranties for. This has already happened twice to me while driving and both times Lexus will not fix it under warranty claiming it does not happen when they take it in. They will not fix the problem unless it occurs while their testing even though the notification indicating the issue is coming up. They have also claimed it is safe to drive although it does not seem safe to have a car randomly stall at any point of time. My research has shown that this is a common problem for consumers with this car. It is also understood that the fix would require a considerable amount of time to fix by Lexus ( they would need to keep the car for a month). The cost associated with this is likely why they are hesitant to fix.
We have returned 2007 Lexus is 250 4 times to dealer for stalling while on highway. Dangerous scenario. Each time the service center stated the car was fixed only to get back on highway and again it stalls. The last two times the car would not go over 5 mph within 24 hours of when car was returned to us. The last three trips to Lexus have been within the last 2 weeks. I don't think Lexus has a grasp of why their cars are stalling.