How to know if a Subaru alternator is bad?
As a car owner, understanding the signs of a failing alternator can save you from unexpected breakdowns and costly repairs. Subaru vehicles, known for their reliability, can still experience alternator issues over time. In this article, we will explore the common symptoms of a bad alternator, how to diagnose the problem, and what steps to take if you suspect your Subaru's alternator is failing.
Common Symptoms of a Failing Alternator
Recognizing the signs of a bad alternator early can help prevent further damage to your vehicle. Here are some common symptoms to watch for:
- Dim or Flickering Lights: If your dashboard lights or headlights are dimming or flickering, it could indicate that the alternator is not providing enough power.
- Battery Warning Light: A battery-shaped warning light on your dashboard is a clear indicator that there may be an issue with the alternator or the battery itself.
- Electrical Issues: Malfunctions in electrical components, such as power windows, radio, or air conditioning, can signal a failing alternator.
- 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 insufficient power from the alternator.
Diagnosing the Problem
If you notice any of the symptoms mentioned above, it's essential to diagnose the issue accurately. Here are some steps you can take:
- Check the Battery: Ensure that the battery is fully charged and in good condition. A weak battery can mimic alternator problems.
- Test the Alternator Voltage: Use a multimeter to measure the voltage at the battery terminals. A healthy alternator should produce between 13.7 to 14.7 volts when the engine is running.
- Inspect the Alternator Belt: Check for any signs of wear or looseness in the alternator belt, as a slipping belt can affect the alternator's performance.
- Listen for Noises: Pay attention to any unusual sounds coming from the alternator while the engine is running, which could indicate internal damage.
What to Do If Your Alternator is Bad
If you confirm that your Subaru's alternator is failing, it's crucial to take action promptly. Here are your options:
- Replace the Alternator: The most effective solution is to replace the faulty alternator with a new or refurbished unit.
- Check Related Components: Ensure that other components, such as the battery and wiring, are in good condition to prevent future issues.
- Consult a Professional: If you're unsure about diagnosing or replacing the alternator yourself, it's best to consult a qualified mechanic for assistance.
In conclusion, being aware of the signs of a failing alternator can help you maintain your Subaru's performance and reliability. Regular maintenance and prompt attention to any warning signs will ensure that your vehicle remains in top condition for years to come.
Frequently Asked Questions
Can AutoZone test an alternator?
ALTERNATOR TESTING
Testing will ensure you identify a power issue correctly. How to get your alternator tested: Just visit a nearby AutoZone. We'll test the alternator while it's still in the vehicle.
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 my Subaru alternator is bad?
Weak Or Flickering Headlights
Any problem that involves electrical components like lights, audio equipment or climate controls could ultimately be traced to a bad alternator. One of the most common you'll see first is headlights that are dim and may even flicker or fade as you drive.
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.
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.
Can you jumpstart a car with a bad alternator?
Yes, you can jump start a vehicle with a bad alternator, but it is not a long-term solution. Jump starting a vehicle with a bad alternator will temporarily provide the necessary power to start the engine, but the alternator is responsible for recharging the battery and powering the vehicle's electrical system.
How much does it cost to replace an alternator?
Alternators can average anywhere from $100 to $350 depending on make and model. Most vehicles will have an average cost between $350-400 for the total job of an alternator replacement if no other parts need to be replaced. If the serpentine belt is included in the process, add another $20 to $50 to your bill.
How does a vehicle act when the alternator is going out?
“If your alternator is going bad, you might see the voltage meter on your dashboard start to drop, or your car might start to vibrate while you're driving,” According to Matthew Hart. The vibrations are typically caused by misfires within the spark plug caused by a lack of current from the alternator.
How can I test if my alternator is bad?
Warning Lights: Look for the battery or alternator warning light on your dashboard. Dimming or Flickering Lights: If your headlights or dashboard lights dim or flicker, it could indicate an alternator issue. Electrical Failures: Malfunctions in electrical systems (radio, power windows) may suggest a failing alternator.
Will AutoZone test my 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.
