Replace your BMW alternator

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Compare BMW alternator repair cost and specialists near you


The car’s alternator plays a crucial role in keeping the battery charged.

You may be able to spot that it isn’t working properly if your headlights are dimmer, you can small burning rubber or a growling/whining noise.

Your car battery acting up may also be the result of starter motor failure.

Top garages for BMW Alternator Repair (12,957 found)
Fylde Coast Mobile Mechanics
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Thornton-Cleveleys
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Here at Fylde Coast Mobile Mechanic cater to ever customer vehicle needs at your home or workplace. If it is a job that requires a workshop it will be collected and retur

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Hello. My name's Carlo. I have been working in the motor industry for the last 15 years as a technician mechanic. I have been a mobile mechanic for last 6 years. I a

Liverpool MOT (UK) Limited
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Liverpool
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In our well equipped AA approved workshop, we are able to cope with nearly any kind of work. We have a wide variety of specialist tools and diagnostic equipment to suit m

Evolve Garage Ltd
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Leicester
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We are Repair and Servicing Garage based in the City of Leicester. Our Mechanics are specialists of all makes and models with many years of experience across the whole te

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Bilston
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Looking for a local garage you can trust for service, repairs or Diagnostics on your car? We are happy to help you with your needs by giving you a very efficient work, re

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At FT Mechanics & Servicing we have been providing all aspects of mechanical servicing to cars and vans in Barnet and surrounding areas for a number of years. We hav

Prompt smart repairs ltd
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RAC Mobile Mechanic - We Come to You. Servicing on your drive or at work – Milton Keynes
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The RAC offers complete peace of mind for 12 million drivers. We’re best known for our breakdown service, and now - our new RAC Mobile Mechanics are here to make everyday

A Dixon Autos Ltd
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A Dixon Autos is a mobile vehicle maintenance and enhancement company owned and run by Tony Dixon. Tony has worked in the motor trade ever since leaving school, and in

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Replace your BMW alternator

Frequently asked questions

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.

What are common problems with an alternator?


The alternator acts like a small generator: the engine spins, 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.)

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.

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.

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.

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  BMW Alternator Repair  bookings

4.59

46 reviews

BMW Alternator Prices

Alternator repair prices can vary depending on your BMW model due to differences in labour time and parts needed but you can expect to pay between £250-£300. Take a look below at the average quote on WhoCanFixMyCar.com for some of the top car makes.


Alternator Repair Cost by BMW Model
BMW ModelAverage PriceGet Quotes
BMW 1 Series£698.54
BMW 3 Series£575.10
BMW 5 Series£671.02
BMW 2 Series£572.22
BMW X5£590.10
BMW X6£630.33
BMW 4 Series£757.86
BMW 7 Series£636.88
BMW 6 Series£486.75

This table uses data from quotes provided on FixMyCar between 17/08/2024 and 15/11/2024.

Although the alternator is a relatively simple BMW part, it plays a critical role in your vehicle’s operation, so it’s essential any alternator problems are diagnosed correctly and fixed.


Here are some of the most common signs that your BMW 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 BMW alternator repair cost is between £200 and £300, depending on the model of your BMW, so it’s important you make sure you find the best deal. And that’s where we can help.


Here’s how it works:

  • Simply enter your car registration number
  • Give us some details about your vehicle and the kind of repair work you require
  • We’ll send you a great selection of quotes from mechanics in your area
  • We use our network of 7,000 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