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1999 Mitsubishi Diamante Problems

RepairPal has identified the most common problems with the 1999 Mitsubishi Diamante based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems

A coolant leak may develop from the heater core, requiring replacement of the heater core.

A brake pedal pulsation may be noted on brake apply. This is commonly caused by warping of the front brake rotors. Our technicians remind us that re-machining (turning) the rotors can correct this issue but the repair may last only a short time as the thinner rotors would be even more prone to warping. Replacement of faulty rotors with high quality parts is often the best option in these situations.