I recently bought an 08 IS-F with 16k miles on it. However, I've had a terrible time with the brakes! The dealer tells me there's a TSB on the shim kits and brake pads but they've been replaced in the 2 weeks that I've owned it! The car goes back to the shop tomorrow for another assessment... Is this going to be a constant problem for me or is the Lexus dealership a bunch of idiots?!?