Brake fluid does not compress, that's why it's used. Air does compress, a LOT. When replacing the master cylinder, a large amount of air will enter the brake lines and they must be completely bled to make sure it's out of the system.
Otherwise, when you hit the brakes, the master cylinder pumped fluid into the lines, which compresses the air and nothing much happens at the wheels.
Making you go BAM into whatever is in front of you. The dealership is directly responsible for the accident.
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Monday, June 4th, 2007 AT 5:20 AM