Brakes (A5)第 47 / 120 题
A brake pedal that slowly sinks to the floor while held under steady pressure most likely indicates:
a.Air in the lines only
b.Warped rotors
c.A failing master cylinder (internal leak)
d.Glazed brake pads
解析
A pedal that gradually falls under steady pressure indicates fluid bypassing internally in the master cylinder past worn seals. An external leak would lose fluid visibly. Replacing the master cylinder and bleeding the system restores a firm pedal.
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