It costs about $400 to $639 to replace an alternator as of 2014, depending on the make and model of the car. This amount includes the cost of parts, which is about $279 to $485 excluding taxes and fees, and the cost of l... More »

Replacing the alternator requires loosening the belt pulley, disconnecting the battery and removing the mounting bracket from the vehicle. To safely remove the alternator it is important to understand the vehicles electr... More »

The average cost to repair the alternator on a BMW 325i is $396 to $621, as of 2015, according to RepairPal.com. This is almost the same as the average cost to repair the alternator on any car, which ranges from $402 to ... More »

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A car alternator is an aluminum piece of equipment attached to a car engine's crankshaft by a drive belt. When the crankshaft begins turning after the engine is ignited, it rotates the drive belt, which forces the altern... More »

There are two simple tests you can perform to determine if your car's alternator is going bad: a headlight test and a battery test. Once you have narrowed down the issue with these tests, you can perform electrical tests... More »

If a car makes a squealing noise after the alternator has been replaced, it often needs the serpentine belt or belt tensioner replaced. Continuing to drive the car without repairing the problem often causes early failure... More »

A high-pitched squeal when a car is started indicates that one of the belts, most likely the alternator belt, is loose or worn out. The sound occurs when the belt slips on a pulley. More »