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Speak to an expert mechanic: If you need to speak to a mechanic about Alternator Repairs, call one of our experts today on 03304 004439.

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What is a car alternator?

A car alternator keeps your car's battery charged, which is obviously important because a charged battery starts your car and powers everything electrical within it. It does so using a drive belt (sometimes referred to as a serpentine belt) to convert the mechanical energy of the car's rotating crankshaft into electricity through a process of induction.

What are the possible signs of a faulty alternator?

  • Your car is difficult or slow to start.
  • Growling, whirring, whining or squealing noises are emanating from your car's engine.
  • Your car’s interior and exterior lights seem too dim, blink erratically, gradually fade, suddenly get brighter or don’t come on at all.
  • The red light on your car’s dash with the image of a battery (or the words ALT or GEN) becomes illuminated.
  • Your speedometer has stopped working.
  • You can smell rubber burning.
  • Your car fails a multimeter test at a garage.

What is the cause of a faulty car alternator?

  • The component, a brush, which maintains constant electrical contact with the spinning alternator, becomes worn.
  • The voltage regulator, which makes sure that the electrical charge is passed to the battery at the correct voltage, fails.

How long does a car alternator last?

  • On average, a car alternator can last for 8-12 years without needing for any repairs.

How much does it cost to repair a faulty alternator?

  • On average, it costs between £150-£300 to repair or replace a broken car alternator depending on the vehicle.
  • Refurbished car alternators are available but do not offer that much of a cost saving.

How and where can I get a car alternator repaired?

  • BookMyGarage is partners with over 9,000 garages in the UK so we can almost certainly find one to repair or replace your car.
  • Go to bookmygarage.com, enter your car registration and postcode, and then press the search button.
  • Sort the results by etc.
  • Call one of our expert mechanics on 03304 004439 for help and advice if needed.

Driving in Waltham Forest

Waltham Forest is an outer London borough in the north east of the capital with built-up urban districts in the south with inner-city characteristics, and more affluent residential areas in the north with a variety of parks and greenspace including sections of Epping Forest.

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