Alternator Repair Specialist Garages

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Alternator Problems? Compare local diagnosis and repair prices NOW.



Is your battery not charging? Do your headlights dim when you press the accelerator? If so you probably have an Alternator Fault. Our 10,613 garages nationwide regularly diagnose these things, and our Mobile Mechanics will resolve them at your home or work too.

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Top garages for Alternator Repair (9,295 found)
Pool Street Garage Limited
Newcastle-under-Lyme
Alternator Repair Specialist Garages
Frequently asked questions
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What is a car alternator?

The car's alternator performs a simple, but vital job: to keep your car's battery charged. The battery is responsible for starting the car, spark plugs, lights, electrics, and sometimes power steering - quite a job - so it's essential that it's topped up - and that's what the alternator does.
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What are common problems with an alternator?

The alternator acts like a small generator: the engine spins it, and the alternator turns that spinning motion into electricity.The most common problems are worn brushes (the component that maintains constant electrical contact with the spinning alternator) and a failing voltage regulator (which ensures that the charge is sent to the battery at the correct voltage.)
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What are the common symptoms of alternator problems?

Common signs of car alternator problems include the 'charge' or battery lights flashing on the dashboard, flickering or dimming headlights and interior lights and a growling or whining noise under the bonnet.
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What is the average alternator repair cost?

An alternator can be rebuilt as opposed to replaced, however in truth the difference in cost is often quite small. Either way the most common repair cost is around £150-200.
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How to test an alternator for problems

A simple way to test an alternator for problems is to do what's known as the headlight test. Park your car with the headlights on or run it in neutral, then rev the engine. If the headlights dim you could well have an alternator problem. A better test is to take your car to a garage, where a car alternator can be tested using a multimeter tool.
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What happens if my alternator breaks?

If your alternator fails, your car battery won't charge and, very soon, will have insufficient charge to start the car.

Average rating for Alternator Repair bookings

4.74

265 reviews

How much does Alternator Repair cost?

The cost of a Alternator Repair can vary depending on your car due to differences in labour time and parts needed. Take a look below at the average quote on WhoCanFixMyCar.com for some of the top car makes.


Alternator Repair Cost by Car Make
Car MakeAverage PriceGet Quotes
Ford£233.82
Vauxhall£235.58
Renault£249.87
Volkswagen£221.99
Citroen£234.77
BMW£272.56
Peugeot£227.22
Audi£286.65
Toyota£275.26
Mercedes£288.75
MINI£292.01
Volvo£337.85
Nissan£302.62

This table uses data from quotes provided on WhoCanFixMyCar.com between 23/08/2017 and 21/11/2017.

When should you change an Alternator?

Here are some of the most common signs that your alternator is on the blink:

  • The alternator warning light will be on – in most cases this is shaped like a battery but some cars will show ‘ALT’ or ‘GEN’
  • You may experience extremely bright or dimming headlights, or a speedometer that stops working
  • Drivers sometimes complain of a growling or whining noise before the alternator gives out
  • You may experience a smell of hot wires or burning rubber

The average alternator repair cost is between £250 and £300, depending on the car you drive, so it’s important you make sure you find the best deal. And that’s where we can help.

What does an Alternator do?

An alternator is a generator of electric power in your car and is a major component of your vehicle's charging system.

Whenever your engine is running, the alternator charges your battery and supplies additional electric power for the vehicle's electrical systems.

An alternator is attached to the engine and is driven by a drive belt (also known as a serpentine belt).

The alternator is a vital part of the electrical system as it delivers the power necessary to keeping energy running through the system.

If your alternator has failed, your car battery will soon lose power.

Alternator problems can be a major problem because a car cannot actually start without power in the battery. This is because the starter motor requires electricity to get the engine going.

Starter motor repair can be included in an alternator repair though it may have to be replaced if there has been a serious electrical problem caused from a broken alternator.

On average, an alternator can last for 8-12 years without any repairs. If an alternator fails, the car may still run on battery power alone for a short time, but will die as soon as the battery charge is depleted.

Replacing an alternator with a new unit is quite expensive, though alternator prices will change depending on the vehicle.

Alternator price is shown at the top of this page when it comes to the average cost, however, the only way to get accurate know how much is an alternator repair, is by entering your details in the box above.

Reconditioned Alternators

A reconditioned alternator is a part which has been repaired by a parts repair specialist and it can be fitted in place of a brand new alternator if yours need to be replaced.

There are a number of parts which can be reconditioned and fitted into a car at a lower cost than a new part and some garages may offer you the option of having a reconditioned alternator fitted as opposed to a new alternator.

Where can I get an Alternator repaired?

  • Simply enter your car registration number
  • Give us some details about your vehicle and the the symptoms you're experiencing
  • We’ll send you a great selection of quotes from mechanics in your area
  • We use our network of over 10,613 mechanics and garages across the UK to find you the best deal. You can then compare the quotes, read reviews from previous customers and book your alternator repair online.

    Enter your registration to compare alternator repair prices, read reviews and book your car in online.

Gary from Complete Mechanics explains the workings of the alternator