When purchasing alternator products for your vehicle, there are several key factors to consider to ensure optimal performance and compatibility. Firstly, verify the specifications of your current alternator, including amperage output and mounting configuration, to match the requirements of your make and model. It's also critical to assess the quality and brand reputation, as a reliable alternator can significantly impact your vehicle's electrical system longevity. Additionally, consider whether you're opting for a new, remanufactured, or refurbished unit, as this can affect both cost and warranty coverage. Don’t forget to check for any necessary installation components, such as bolts and wiring, to ensure a smooth replacement process. Lastly, review customer reviews and ratings to gauge satisfaction and performance experiences from other users, helping you make an informed decision for your vehicle’s needs.
Advance Auto Parts customers consistently choose to buy Alternators from trusted brands like Carquest Premium, Carquest, Carquest Professional, and Bosch for their reliability and positive ratings. As of 3/1/26, the Alternators listed below are the ones our customers have preferred most, offering compatibility with a wide array of leading vehicle manufacturers including Chevrolet, GMC, Ford, Dodge, and 102 other popular makes. These best-selling Alternators are priced between $63.99 and $449.99. However, please note that prices may fluctuate based on your location's availability. To ensure a seamless match with your vehicle, we invite you to use the "Add Vehicle" tool in the top menu, or explore the Alternator options. Trust in Advance Auto Parts to provide you with high-quality Alternators to meet your specific car maintenance or project needs.
One of the most common signs is dimming or flickering headlights and interior lights. This occurs because the alternator is responsible for generating electrical power to keep the battery charged and supply power to various electrical components in the vehicle while the engine is running. When it starts to fail the lights may become noticeably dimmer or fluctuate in brightness.
Another symptom of a bad alternator is a warning light on the dashboard often shaped like a battery. This light will illuminate when the alternator is not generating sufficient voltage to keep the battery charged. It's an important indicator that should not be ignored. Some vehicles may also display a warning message in the driver's information center.
"Check Battery and Charging System"
You may also notice difficulty starting your vehicle or a weak or dead battery. Since the alternator is necessary in maintaining the batteries state of charge while the engine is running, a failing alternator can lead to a drained battery.
Unusual noises like grinding or whining sounds may come from the alternator as it struggles to function properly. These noises may indicate there are internal mechanical issues within the alternator.
If you experience a loss of power to various electrical accessories like power windows, the radio, or the air conditioning, it could be due to a failing alternator not providing enough electrical power to support these systems.
If you observe any of these symptoms, it's important to have your alternator inspected, tested, and repaired or replaced promptly.
View our Diagnosing a Failing Alternator video for more tips.
Read How to Replace an Alternator for a step by step guide.