I usually whistle when I don't know the words, just kidding. The whistle could well be coming from the brake booster, leakage at the input shaft can be the source, I am not a Toyota guy, but BMW cars do the same thing, I have seen it several times. You might be looking at replacement of the booster to relieve this noise maker. Does this seem reasonable to you?
Sunday, August 15th, 2010 AT 10:44 AM