I have had the same problem with my IS, but unfortunately for me i had only just bought the car. Jack the car up and remove the wheel and see how easy you can rotate the disc. i personalt tried twice to free off the caliper but it always return to the same state after a days use. So i bitt he bullet and bought a caliper for it. fortunately i managed to get a second hand one from a breakers yard £25. right result i thought. just wanted to say that if you havent cured the fault? i know that the breakers that i got my cliper from have still deff got a left hand caliper for is 200?
