At what mileage do alternators fail?
The alternator is a critical component of your vehicle's electrical system, responsible for keeping the battery charged and powering various electrical systems while the engine is running. Like any part, alternators have a lifespan, and understanding when they might fail can help you avoid unexpected breakdowns. In this article, we’ll explore the typical mileage range for alternator failure, factors that influence its lifespan, and tips to extend its longevity.
Typical Mileage for Alternator Failure
On average, alternators are designed to last between 80,000 and 150,000 miles. However, this range can vary depending on the make and model of your vehicle, as well as your driving habits and maintenance practices. Some alternators may fail earlier, while others can last well beyond this range with proper care.
Factors That Influence Alternator Lifespan
Several factors can affect how long your alternator lasts. Here are the most common ones:
- Driving Conditions: Frequent stop-and-go driving or short trips can put extra strain on the alternator, reducing its lifespan.
- Electrical Load: Using high-powered accessories like aftermarket sound systems, additional lighting, or other electronics can overwork the alternator.
- Quality of the Alternator: OEM (Original Equipment Manufacturer) alternators tend to last longer than cheaper aftermarket options.
- Maintenance: Regular maintenance, such as checking the drive belt and ensuring the battery is in good condition, can help prolong the alternator's life.
- Environmental Factors: Extreme heat or cold can accelerate wear and tear on the alternator.
Signs Your Alternator May Be Failing
It’s important to recognize the warning signs of a failing alternator to avoid being stranded. Common symptoms include:
- Dim or flickering headlights.
- Dashboard warning light (often shaped like a battery or labeled "ALT").
- Electrical issues, such as malfunctioning power windows or radio.
- Difficulty starting the car or a dead battery.
- Unusual noises, such as grinding or whining, coming from the engine bay.
Tips to Extend the Life of Your Alternator
While alternator failure is inevitable over time, you can take steps to maximize its lifespan:
- Limit Electrical Load: Avoid running unnecessary electrical accessories when the engine is idling.
- Maintain the Battery: A weak or failing battery can overwork the alternator, so ensure your battery is in good condition.
- Inspect the Drive Belt: A worn or loose belt can cause the alternator to work inefficiently.
- Schedule Regular Maintenance: Have your vehicle inspected by a trusted mechanic to catch potential issues early.
Conclusion
While alternators typically last between 80,000 and 150,000 miles, their lifespan depends on various factors, including driving habits, electrical load, and maintenance. By recognizing the signs of a failing alternator and taking proactive steps to care for your vehicle, you can avoid unexpected breakdowns and keep your car running smoothly. If you suspect alternator issues, don’t hesitate to visit a trusted auto repair shop like Kevin’s Autos for a professional diagnosis and repair.
Frequently Asked Questions
What is the average 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.
What are the signs of a bad alternator?
How Do You Know if a Car Alternator is Bad?
- 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 long do alternators typically last?
about seven years
How Long Does an Alternator Last? You may also be wondering about alternator lifespan. The average lifespan for most alternators ranges from 80,000 and 150,000 miles. Usually, an alternator lasts about seven years.
Can an alternator last 200 000 miles?
Alternators can last a very long time and some car owners report their alternator working past 200,000 miles if not more.
Is it better to replace the alternator or buy a new car?
Alternator failures are common enough that replacing one rarely costs more than the car itself, so if you're asking if it's worth replacing the alternator, the answer is yes, unless you can buy another used-up car for less than it costs to replace an alternator.
How much does it cost to fix an alternator?
Alternator replacement costs depend on the model. One can expect to pay $100 to $350 on average for the part alone. However, some luxury models may require alternators in the $500 to $700 range. In most cases, costs will average between $350 to $400 for the alternator replacement if no other parts need to be changed.
What kills the alternator?
Factors such as heat, vibration, and electrical spikes can eventually cause the alternator to fail. According to Repair Smith, your car's alternator may fail because of: Age and use-related wear. Engine oil of power steering fluid leaking onto the alternator.
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.
Do alternators fail suddenly?
Alternators can go bad suddenly, or slowly over time. If your alternator is slowly going bad over time there are some warning signs you can look out for.
What mileage do alternators go bad?
Alternators typically need replacement every 7 to 10 years or 80,000 to 150,000 miles. How do I know if an alternator needs replacing? Signs include dim lights, a dead battery, strange noises under the hood, and battery warning lights.
