28 Jul, 23

Ford Fiesta Mk6 Alternator Problems and How to Resolve Them

The Ford Fiesta Mk6 alternator, produced between 2008 and 2017, is a popular compact car known for its reliability and fuel efficiency. However, like any vehicle, it is not immune to issues, and one of the common problems that owners might encounter is related to the alternator. The alternator plays a crucial role in charging the car’s battery and providing power to various electrical components. In this article, we will explore some of the common alternator problems that Ford Fiesta Mk6 owners might face and discuss potential solutions to resolve these issues.

Ford Fiesta Mk6 Alternator

Common Ford Fiesta Mk6 Alternator Problems

Charging System Warning Light

One of the primary indications of an alternator problem is the illumination of the charging system warning light on the dashboard. This warning light resembles a battery and is usually red or amber. When it lights up, it indicates that the alternator is not generating enough power to charge the battery properly.

Dimming or Flickering Lights

A faulty alternator may result in dimming or flickering headlights, interior lights, and dashboard lights while driving. This is a clear sign that the alternator is struggling to provide sufficient electrical power to the car’s systems.

Dead Battery

If the alternator fails to charge the battery effectively, it can lead to a drained battery. As a result, the car may not start, and you might need a jump start or battery replacement.

Strange Noises

A failing alternator can produce grinding, whining, or squealing noises. These sounds usually indicate issues with the alternator’s internal components such as the bearings, pulley, or rotor.

Electrical Issues

Problems with the alternator can cause erratic behavior in various electrical components of the car, such as power windows not functioning correctly, radio cutting out, or warning lights randomly appearing.

Resolving Ford Fiesta Mk6 Alternator Problems

  • Battery Inspection: Before assuming that the alternator is the culprit, it is essential to inspect the battery thoroughly. Check the battery terminals for any corrosion or loose connections. Clean the terminals if necessary and ensure they are tightly secured. Also, examine the battery for signs of damage or depletion, and if it’s old or defective, replace it before diagnosing the alternator.
  • Check Belt Tension and Condition: A loose or worn-out serpentine belt can cause the alternator to underperform. Inspect the belt for cracks, fraying, or looseness. If needed, adjust the belt tension or replace it with a new one.
  • Test Charging System Voltage: To diagnose the alternator accurately, use a multimeter to measure the voltage across the battery terminals while the engine is running. The voltage should typically be around 13.5 to 14.5 volts. Anything significantly lower may indicate a faulty alternator.
  • Inspect and Replace Faulty Components: If you hear unusual noises coming from the alternator or notice signs of internal damage, such as leaking fluids or damaged pulleys, it’s best to replace the faulty components or the entire alternator, if required.
  • Seek Professional Help: While some car owners might have the skills to replace the alternator themselves, it is often a complex task that requires technical expertise. If you’re unsure about diagnosing or fixing the problem, it’s better to take your Ford Fiesta Mk6 to a qualified mechanic or dealership.

Read more: 6 Preventative Maintenance Tips For Maintaining Your Car’s Engine


1. What is the alternator’s role in the Ford Fiesta Mk6?

The alternator in the Ford Fiesta Mk6 is responsible for converting mechanical energy into electrical energy while the engine is running. It charges the car’s battery and powers the various electrical components, such as lights, radio, power windows, and more.

2. How do I know if my Ford Fiesta Mk6 has an alternator problem?

Several signs indicate potential alternator problems in your Ford Fiesta Mk6:

  • Illumination of the charging system warning light on the dashboard.
  • Dimming or flickering lights while driving.
  • Difficulties starting the car or a completely dead battery.
  • Unusual noises coming from the alternator.
  • Erratic behavior of electrical components in the vehicle.

3. Can I continue driving my Ford Fiesta Mk6 with a faulty alternator?

It is not recommended to drive the car with a faulty alternator for an extended period. A failing alternator can lead to a drained battery, leaving you stranded on the road. Moreover, as the electrical components rely on the alternator for power, their performance may become erratic, affecting your driving experience.

4. How can I troubleshoot my Ford Mk6 alternator problems?

Before assuming the alternator is the issue, check the battery terminals for corrosion and secure connections. Inspect the serpentine belt for any signs of damage or looseness. Measure the voltage across the battery terminals while the engine is running using a multimeter to determine if the alternator is generating sufficient power.

5. Can I replace the alternator in my Ford Fiesta Mk6 myself?

Replacing the alternator in a Ford Fiesta Mk6 can be a complex task and requires technical knowledge and skills. If you are experienced with car repairs and have the necessary tools, you may attempt to do it yourself. However, for those without proper experience, it is best to seek professional help from a qualified mechanic or a dealership.

6. How long does a Ford Fiesta alternator typically last?

The lifespan of the alternator in a Ford Fiesta Mk6 can vary depending on factors such as driving habits, maintenance, and environmental conditions. On average, an alternator can last anywhere from 80,000 to 150,000 miles (approximately 129,000 to 241,000 kilometers).

7. What is the cost of replacing the alternator in a Ford Fiesta Mk6?

The cost of alternator replacement can vary depending on the vehicle’s location and whether you choose an original equipment manufacturer (OEM) or aftermarket part. On average, the cost of a new alternator for a Ford Fiesta Mk6 can range from $200 to $500. Labor charges for installation may add to the overall cost if you choose to have it professionally replaced.

8. Can a bad alternator cause other electrical problems in my Ford Fiesta Mk6?

Yes, a faulty alternator can cause other electrical issues in your Ford Fiesta Mk6. Since the alternator powers various electrical components, a decrease in power output can lead to erratic behaviour, such as malfunctioning lights, radio, power windows, and warning lights randomly appearing on the dashboard.

9. Are there any preventive measures to avoid alternator problems in my Ford Fiesta Mk6?

Regular maintenance of your vehicle, including checking the battery, serpentine belt, and alternator components, can help detect potential issues early. Additionally, driving responsibly and avoiding overloading the electrical system can contribute to the longevity of the alternator.

10. Can I use a refurbished alternator for my Ford Fiesta Mk6?

Using a refurbished alternator is an option, but it’s essential to ensure the quality and reliability of the refurbished part. Purchasing from a reputable supplier or choosing an OEM refurbished alternator can provide a cost-effective solution without compromising on performance and durability.


The alternator is a vital component of your Ford Fiesta Mk6, as it ensures the electrical system functions correctly and keeps the battery charged. If you encounter any of the aforementioned signs of alternator problems, it’s crucial to address them promptly to prevent further damage and avoid potential breakdowns. Regular maintenance and inspections can help identify issues early on, and seeking professional help when needed can ensure the proper functioning of your vehicle’s alternator and electrical system, allowing you to enjoy a smooth and trouble-free driving experience.

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