I'm not sure about Lexus extended warranty covering that bit. What I do know is, that we are just back from a trip to Spain in my late 2007 IS220D. Noticed that coolant had come out of the radiator overflow pipe, so I took it to the dealer in Aberdeen (Arnold Clark Toyota). They tell me it looks like the head gasket known problem, and it woul dbe expensive to fix!!! I asked about the Lexus extended warranty and whether it would cover the fix, especially as the car has just hit a little over 70K miles. Abruptly told that Lexus UK wouldn't entertain the fix cost as I am 4 months out of the 7 year extended warranty. I'm fuming as my last three cars have been lexus, and the service record is impeccable... I am going to contact them directly as I feel that the dealer hasn't really bothered explaining my customer loyalty etc, and that it is only 4 months over the warranty period, and has done no where near the 110000 mile mileage limit. If this doesn't work out I'll check with trading standards as they sold me a car which is not fit for purpose!!!!
Col