Description: Fits SequoiaBrake Proportioning Valve - Repair or ReplaceProportioning valves were used before ABS to divert brake force to the front and rear brakes. If your proportioning valve fails, you may notice a brake fluid leak, Soft Pedal, or inefficient or grabby brakes. Have a Toyota technician diagnose and replace the brake proportioning valve in your Toyota . On Master Cylinder.