Your Subaru can be a part of your family, and as such, you need to make sure it stays safe, healthy, and as reliable as possible. In the case of an alternator, sometimes it's necessary to replace them if they cannot perform at maximum capacity anymore. This part of your Subaru powertrain system will help provide the electricity needed to power accessories, lights, and the starter when you are starting the engine. However, some signs will indicate you should take this course of action sooner rather than later. You need to know these signs and how to avoid failure and premature replacement of alternators before they fail.

Read below to determine how to tell if your Subaru alternator is failing before it causes you trouble on the road or at home.

Dim Lights

If your lights seem to be dimmer than usual and your radio and stereo aren't as loud as they used to be, then you might want to take a look at your car's alternator. The alternator is responsible for providing power for all of your electrical components, including your headlights. It makes sure that you always have enough juice on hand to keep them running correctly. Over time, as an alternator deteriorates, it becomes less efficient. It doesn't produce as much power - hence why you might notice things like dimmer lights or lower quality sound coming from inside your car. Even if you turn up your radio or switch over to brighter headlights, it won't help - because you're still not receiving enough power from it.

Dead Battery

This is one of the most common signs that you are having issues with your alternator. This occurs when your vehicle won't start or have sufficient power to run its electrical systems properly. The battery light will also come on when you turn on your car, but it doesn't always mean that there is a problem with your alternator. Try starting your car with just a tiny amount of electrical load to determine any real issue. If not, you might want to have your alternator checked out by a professional mechanic before spending money on getting a new battery.

Whirring and Buzzing Noises from the Engine

If you're hearing strange sounds that seem to be coming from under your hood, it could be an indicator that something is wrong with your alternator. Don't ignore these noises; having an automotive expert inspect your car for you would be in your best interest.

Unusual Electrical Bugs

You might notice strange electrical issues like: headlights coming on when you turn on your wipers, taillights not working, windows and interior lights flickering on and off, or an unusual number of warning lights coming on. All of these issues can be traced back to your alternator. As it fails, more power-sucking devices (like radio systems and air conditioners) will start to drain your battery faster than it can charge, making those problems even worse.

The Car Stalls

When you're driving and all of a sudden your engine stalls, it's likely that there's a problem with your alternator. This is because when your alternator fails, it cuts off power to some of your car's systems, including those that keep your engine running smoothly. Check under your dashboard or in your owner's manual for signs of stalling and identify what it means. If you see any signs of trouble with starting and idling, go in for service right away to prevent further damage to other parts of your vehicle. 

Competition Subaru of Smithtown

601 Middle Country Road
Directions St James, NY 11780

  • Sales: 631-361-4500
  • Service: 631-361-4515
  • Parts: 631-361-4500

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