At what mileage should you replace your alternator?
The alternator in your vehicle is responsible for charging the battery and powering the electrical system while the engine is running. Over time, the alternator can wear out and need to be replaced. The general recommendation is to replace your alternator around 80,000 to 100,000 miles, but the exact mileage can vary depending on several factors.
What is an Alternator?
An alternator is a generator that converts mechanical energy from the engine into electrical energy to charge the battery and power the vehicle's electrical components. It works by using the engine's rotation to spin an electromagnetic rotor, which induces an electrical current in the stator windings. This current is then regulated and used to charge the battery and power the electrical system.
Signs Your Alternator Needs Replacement
There are several signs that may indicate your alternator is failing and needs to be replaced, including:
- Battery not charging: If your battery is not holding a charge or the voltage is low, it could be a sign of an alternator issue.
- Dimming headlights: If your headlights or other electrical components seem to be dimming or flickering, it may be a sign that the alternator is not providing enough power.
- Battery warning light: If the battery warning light on your dashboard is illuminated, it could indicate a problem with the alternator.
- Electrical issues: If you're experiencing other electrical problems, such as issues with your radio, dashboard lights, or other components, it may be due to a failing alternator.
If you notice any of these signs, it's important to have your alternator tested by a professional mechanic to determine if it needs to be replaced.
Alternator Replacement Mileage
As a general rule, it's recommended to replace your alternator around 80,000 to 100,000 miles. 1 However, the actual mileage at which you need to replace your alternator can vary depending on several factors, including:
- Driving conditions: If you frequently drive in hot or cold weather, or in stop-and-go traffic, your alternator may wear out faster.
- Electrical load: If you have a lot of electrical accessories in your vehicle, such as a stereo system or additional lights, it can put more strain on the alternator and cause it to wear out faster.
- Maintenance history: If your vehicle has been well-maintained and the alternator has been regularly inspected, it may last longer than the typical 80,000 to 100,000 mile range.
It's important to have your alternator tested regularly, especially if you notice any of the signs of a failing alternator. By replacing your alternator at the appropriate mileage, you can help ensure that your vehicle's electrical system continues to function properly and avoid any unexpected breakdowns.
How do I know when my alternator needs replacing?
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 many miles will an alternator last?
Most alternators last between 80,000 and 150,000 miles, depending on how the vehicle is used.
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.
Is it better to replace the alternator or buy a new car?
If the alternator is in good shape and the cost of rebuilding is significantly lower than replacing, rebuilding might be the better option. However, if you want peace of mind and reliability, especially for a vehicle you plan to keep for a long time, replacing the alternator is typically the better choice.
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.
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 do I know if my alternator is still good?
Voltage Testing
With the engine off, you should get a reading around 12 volts. Now start the engine – the voltage reading should increase to between 13.5-15 volts. If it stays around 12 volts, that indicates your alternator is not charging properly.
What is a fair price to replace an alternator?
Some car repairs are minor, costing under $50 while major repairs can be thousands of dollars. An alternator is on the lower end of the scale and, depending on several factors, the cost to replace the alternator can range somewhere between $100 and $1,000.
How much does it cost to get a new 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.
