How do I know if my Subaru alternator is bad?
As a car owner, understanding the signs of a failing alternator can save you from unexpected breakdowns and costly repairs. The alternator is a crucial component of your vehicle's electrical system, responsible for charging the battery and powering the electrical systems while the engine is running. In this article, we will explore the common symptoms of a bad alternator in your Subaru and provide tips on how to diagnose the issue.
Common Symptoms of a Failing Alternator
Recognizing the signs of a bad alternator early can help you address the problem before it leads to a complete failure. Here are some common symptoms to watch for:
- Dim or Flickering Lights: If you notice that your headlights or dashboard lights are dimming or flickering, it could indicate that the alternator is not providing enough power.
- Battery Warning Light: Most vehicles, including Subarus, have a battery warning light on the dashboard. If this light illuminates, it may signal an issue with the alternator or the battery.
- Electrical Issues: Problems with electrical components, such as power windows, radio, or air conditioning, can be a sign that the alternator is failing to supply adequate power.
- Strange Noises: A failing alternator may produce unusual sounds, such as grinding or whining, which can indicate worn bearings or other internal issues.
- Difficulty Starting the Engine: If your Subaru struggles to start or requires multiple attempts, it may be due to a weak battery caused by a malfunctioning alternator.
How to Diagnose a Bad Alternator
If you suspect that your Subaru's alternator may be failing, you can perform a few simple tests to confirm your suspicions:
- Check the Battery Voltage: Use a multimeter to measure the battery voltage. A healthy battery should read around 12.6 volts when the engine is off and between 13.7 to 14.7 volts when the engine is running. If the voltage is lower than this range while the engine is running, the alternator may be faulty.
- Inspect the Alternator Belt: A loose or worn alternator belt can affect the alternator's performance. Check for any signs of wear or looseness and replace it if necessary.
- Listen for Unusual Noises: Start your engine and listen for any strange noises coming from the alternator. If you hear grinding or whining sounds, it may indicate internal damage.
- Perform a Load Test: A load test can help determine if the alternator is functioning properly under load. This test is best performed by a professional mechanic.
Conclusion
Being aware of the signs of a failing alternator can help you maintain your Subaru and avoid unexpected issues on the road. If you notice any of the symptoms mentioned above, it's essential to have your vehicle inspected by a qualified mechanic. At Kevin's Autos, we are here to help you with all your auto service needs, ensuring your vehicle runs smoothly and reliably.
Frequently Asked Questions
How long do Subaru alternators last?
How Long Do Subaru Alternators Last? Subaru alternators typically last around seven years or more, often exceeding 100,000 miles.
How do I know if I need a new alternator or battery?
One of the most obvious signs is if the car dies after a jump start. The alternator should provide enough current to keep the vehicle running even with a bad battery. If it doesn't, then your alternator needs to be examined.
What are the first signs of an alternator going bad?
Some warning signs of a failing alternator include:
- Trouble starting your car.
- Frequent stalling.
- Whining or screeching noise after the vehicle starts.
- Dim or overly bright lights.
- Smell of burning rubber or wires.
- Dead battery.
- Battery dashboard warning light is on.
Can AutoZone test an alternator?
Getting your alternator tested at AutoZone is simple and hassle-free. An AutoZoner can test your alternator while its still in your vehicle, saving you the hassle of removing it and re-installing it if it's still good. Or, if you have the alternator out of your vehicle already, we can test it on the bench instead.
Do all subarus use the same alternator?
Any subaru alternator will fit, and if you steal the connector too, you can make it work.
How do I know if I need to replace my alternator?
7 Common Signs Your Vehicle Needs an Alternator Repair
- Starting Problems or Frequent Stalling.
- Warning Light Illuminates.
- Headlights Are Either Too Faint or Too Bright.
- Poorly Charged Car Battery.
- Burning Smell.
- Electronic Features Malfunction.
- Growling Sounds.
How does a vehicle act when the alternator is going out?
And interior lighting if the lights brighten as rpms. Increase that is a telltale sign of a failing alternator.
How can I test if my alternator is bad?
How do I test to see if my alternator is bad? Remove the negative cable from the battery while the car engine is running. If the vehicle stalls, the alternator may be bad. Alternatively, use a multimeter to check the voltage generated by the alternator to determine if it is fit for use.
How much does an alternator cost Subaru?
The average cost for alternator replacement is $747 to $842.
How to tell if a Subaru alternator is bad?
How to Tell When Your Subaru Needs an Alternator Repair
- Electrical Power Falters.
- Battery Fails to Recharge.
- Engine Losses Power.
- Dashboard Warns You.
