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If your 2006 4runner is experiencing issues with the alternator, there are a few clear signs to watch for. One indication is a dead battery. While a dead battery doesn't necessarily indicate a bad alternator, a faulty alternator is a common cause of a dead battery. If the battery hasn't completely died, you might observe dim or erratic behavior from the instrument panel, including flickering and unusual sounds, due to fluctuating power supply. Replacing the alternator typically costs between $300 and $500, covering both parts and labor. While this expense may be a bit steep, replacing the alternator is crucial to prevent further damage. Delaying the replacement can lead to a deteriorated battery within a few weeks, incurring an additional cost of around $100. If you choose to replace the alternator yourself, you will need to unclamp and remove it, but fortunately, it is conveniently located at the front and easily accessible.
Mike and Doris are probably discussing the V6 engine, as it's easier to swap compared to the more challenging V8.
Replacing the alternator on a Toyota 4Runner is a straightforward task, but it can still be costly, typically ranging from $400 to $600, which includes the cost of labor.