Engine Problems of Lexus IS250

Lexus IS250 owners have reported 4 problems related to engine (under the engine and engine cooling category). The most recently reported issues are listed below.

car image   Engine problem of the 2007 Lexus IS250 1
Failure Date: 02/12/2010

Sudden acceleration with 2007 Lexus is 250.

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car image   Engine problem of the 2007 Lexus IS250 2
Failure Date: 12/10/2009

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. We did not experience any other electrical problems before the issue. We have the factory oem standard floor mats, secured by the hook and it was not touching the accelerator pedal.

car image   Engine problem of the 2008 Lexus IS250 3
Failure Date: 09/15/2008

About 1 month after taking delivery of this new Lexus, the driver slowed and began breaking for a red light. Suddenly the engine surged and the car accelerated for 1 to 2 seconds. No recurrence since (1 1/2 years).

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car image   Engine problem of the 2006 Lexus IS250 4
Failure Date: 07/18/2008

I was operating my 2006 Lexus Is250 awd at very low speed in a parking lot when the engine began to surge. I could not bring the car to a stop using the brake pedal and could barely keep it from creeping forward. I shifted into neutral and the engine really began to roar, revving very high, but I was then able to stop the car and turn it off using the stop/start button. When I restarted the car it operated normally and the problem did not re-occur. The floor mat had nothing to do with the problem, as it was a factory mat held in place by the little hooks, and was not the all weather mat. The mat was in place after the incident. I reported the occurrence to my dealer, warnock Lexus, in livingston, n. J. They checked the car out and found nothing wrong and no evidence of anything wrong in the computer's memory. The problem did not recur and the car was returned to Lexus at the end of the lease. I now have a 2009 Is250 awd and am concerned about the reports of this problem. I don't feel the floor mat had anything to do with it. The date below is approximate, but Lexus should have a record of the incident from the dealer service department.

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