Same issue for me. Fed up
Same issue for me. Fed up with Lexus! This is a quality brand? I've had Fords last longer. My 2007 IS250 had warning lights come on and has 2 cylinders misfiring. Dealer confirmed the carbon buildup issue. Lexus is denying the repair since it is over the 9 year warranty. They only offered $1500 towards the $6000 repair. Car only has 85k miles and well maintained with only premium fuel. We are paying for a bad design. If they don't make this right I will never buy a Lexus again and convince others to do the same. They will lose more than $6k from this.