A faulty alternator can damage other electrical components of your car. Plus, it’s a safety hazard as a failing alternator can dim the headlights of your car, leading to compromised visibility. Let’s discover the common signs of a faulty alternator and alternator replacement cost in this blog post. Along with that, we’ll also discuss why an alternator goes bad.
An alternator acts as a generator, converting mechanical energy from the engine into electrical energy. When your car is running, the alternator spins, driven by the engine’s belt. This motion generates electric power, which is then stored in the battery. It is responsible for powering electrical components like your headlights, radio, power windows, and even the ECU.
The alternator replacement cost in the UK is between £275 and £700. Here are the factors that can affect the cost of replacing an alternator:
Alternators can fail due to several reasons. Here are certain causes you need to be aware of:
You can save hundreds of pounds in accessory replacement costs by staying aware of these crucial signs of a failing alternator:
Although a battery warning light can mean several things, it’s often a direct indicator of a faulty alternator. The alternator is responsible for charging the battery. If the light stays on, it suggests that the alternator isn’t functioning properly, leading to a discharged battery.
When your headlights start to dim or flicker, especially when you turn on other accessories like the stereo or air conditioning, it could be a sign that the alternator is struggling to provide enough power. This usually happens when idling or driving at low speeds.
A slow cranking sound or difficulty starting the car, especially after the car has been sitting for a while, can be a symptom of a failing alternator. If the problem persists, you may eventually be unable to start your car at all.
Compare the speed of the windows to how they rolled up in the past. If there’s a noticeable difference, it could be a sign of a failing alternator. If your alternator is failing, it may not provide enough electricity to run the window motors at their normal speed.
While corrosion on battery terminals can occur for various reasons, it can also be due to a failing alternator. When the alternator isn’t charging the battery properly, it can lead to an imbalance in the battery’s chemical composition. This can cause increased corrosion on the terminals.
Premature battery failure is also another sign of a failing alternator. Car batteries do have a fixed lifespan, but if your alternator is faulty, it may not charge the battery adequately, leading to premature battery failure.
Alternators typically last between 8-10 years or approximately 80,000 to 150,000 miles, though their lifespan can vary depending on several factors. These include the quality of the alternator itself, the installation of aftermarket accessories, and the total load of the electrical system.
Yes, a faulty alternator will likely lower your car’s overall value when you sell it. A relatively new car with a minor problem might experience a 4-5% depreciation, whereas the impact on older cars may be less noticeable, with a 2-3% depreciation. Ultimately, it depends on the severity of the issue. If the alternator issue is minor, you may not lose any value at all.
In conclusion, a faulty alternator can lead to other electrical system issues and potentially expensive repairs. That’s why recognising the signs of a failing alternator is crucial to prevent further damage to your car’s electrical system and save hundreds of pounds in replacement costs.
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