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. Finally, the dealership decided that carbon had built up on the valves and that was causing the engine to misfire and all the lights to come on. The dealership sent the valves to a shop and had them cleaned and ground down. The service manager told me that there was a design flaw and this is what Lexus told them to do to fix it. Now, here I am at 81,000 miles and the same thing happened again yesterday with the car shaking, stalling, misfiring and the vsc light, traction skid light and check engine lights coming on. It has been another 40,000 miles and the carbon has built up again. I have read on the internet that many other people have had the same problem.

- North Little Rock, AR, USA

I was driving on a local country road at about 15-20 mph (having just come out of a sharp turn). When I stepped on the accelerator after the turn, it suddenly began to "gun", at which point I stepped on the brake and to my horror got no response. I kept my foot on the brake, but the accelerator continued to rev or gun horrifyingly and the car continued to speed up. At another sharp turn I went off the road and sideswiped a tree, drove through the bedroom of a house (in one wall and out the other) and finally stopped in another tree. After an hour of police, fire, and other emergency personnel attempting to extricate me from the car, they had to remove the roof of the car to get me out of the vehicle. I was airlifted to the nearest hospital with a trauma center, where I was diagnosed with a fractured sternum, three broken ribs, two fractured vertebrae, and a lacerated liver. I was in the hospital for three days, after which I was released with a custom-fitted back brace that I was required to wear for the next six weeks. Fortunately, I was not permanently injured, but I suffer back pain regularly as a result of the fractured vertebrae.

- New York, NY, USA

Compartment of where the cabin air filter is for the 2007 Lexus Is 250, a bolt is rusting and the dealership acknowledges the fact but fails to fix the issue. They claim that this is common for the bolt to rust.

- Anniston, AL, USA

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. The engine was at normal operating temperature, initially running at near idle (in the parking lot), with the gear shift in drive, cruise control off, radio, cd, A/C, defroster were all off. Heat and fan were on with interior temp set at 74 degrees. This episode has not repeated as of the filing of this report (4 days post-event). Note: I was wearing "sneakers", not any type of oversized winter boots. The car mats had been previously replaced by the dealer as a result of an earlier recall; no additional mats were in place. All required maintenance, up to and including 36,000 miles, has been performed by the dealer.

- Ashland, MA, USA

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. Lexus stated it is the vehicle motor pipes that need be changed and they have not arrived at the dealership up until today May 26, 2009. They have told me the vehicle motor pipes are on back ordered until June 2009. What can I do"?" the consumer was informed the engine escape valves were broken. Updated 05/27/09.

- Ponce, PR, USA

The contact owns a 2007 Lexus Is 250. The contact stated that the dealer could not repair the vehicle according to NHTSA campaign id number 09V020000 (engine and engine cooling) in a reasonable amount of time. The failure and current mileages were 14,000. Updated 03/12/09. The dealer informed the consumer, the next appointment was within a month. Updated 03/16/09.

- Roanoke, VA, USA