Had the steering rack replaced under warrenty. After the work was done there is more engine noise in the cabin. The dealer I went to has a very good staff and has been very helpful and polite. They went throught the car for two days and everything is in place. I can live with the noise but not the "whistling" that comes from the engine when I am between 65 and 85 especially when under a load, like passing. I am sure that it is intake related. Has anybody else had this noise problem? Could the air filter be causing this whistling noise? I really like my focus but it is so annoying to have this problem.