2007 Lexus IS 250 Engine cooling Problems

“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.”

“At approximately 40,000 mi. My 2007 Lexus IS 250 developed a problem of stalling, shaking, misfiring and the vsc light, traction skid light and check engine lights all come on. The dealership initially tried to tell me that the gas cap was not on tight (not true) and then they tried to tell me that just turning the lights off would fix the problem (also not true). After I insisted that the problem was serious and dangerous, the technician drove the car home and had the same problem that I had been experiencing. …”

“On 3/5/11 at approximately 8:30 am, I was in a parking lot traveling at about 5 MPH in drive with my right foot lightly applying the brake when the brakes seemed not to hold as they should and the engine suddenly increased to 4500 - 5500 RPM. I applied increased force to the brake pedal, placed the gear shift into park, and noted the rpms climbing above 5500. I then pressed the start/stop button and the engine stopped. This episode occurred on dry, smooth asphalt on a clear, cold (30 degree) day. …”

“On 02/06/09 the car engine malfunction light turned on as well as the other one's on the dash. The car reduced the velocity while driving on the highway and did not accelerate any faster the 40 MPH. I took the car to the Lexus dealership service department. They stated it was a misfire in some cylinder and also some problem with the gasoline. They fixed it. On may 4, 2009 I had the same problem with the car. The car malfunctioning lights turned on and the car loses velocity while driving on the highway. So far the car has been at the Lexus service department waiting to be repaired. …”

“Unintended sudden acceleration while braking for a stop sign in a residential area. This was the only time of the occurrence, was able to stop it by turning off the engine. Upon restart, problem resolved itself. It was taken to the dealer with description of the problem, they noted idle was up from 750 RPM to 1100 RPM, decided to keep it overnight for further investigation. We where contacted the next day and told that the problem was resolved. They advised us the found a loose battery connection. No parts replaced but resolution and problem don't make sense. …”