Rick's Free Auto Repair Advice

Posts Tagged: repeat alternator failures

Repeat alternator failures

What causes repeat alternator failures The factory alternator usually lasts about 125,000 to 150,000 miles. But some owners replace their alternators over and over again. They wonder what causes repeat alternator failures when the first one lasted so long. Alternators can fail due to worn bearings or rotor brushes but most fail due to burned-out diodes or a burned-out internal voltage regulator. In other words, the electronics fail before the mechanical components fail. So the question is; what causes the electronics to burn out early? Reason #1 Replacement alternators can … Read More


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