Service, Repairs & MOT

Alternator repair in London

Book an RAC Mobile Mechanic and we’ll come to you at home or work.

  • 12-months parts guarantee
  • Honest pricing
  • Exceptional customer service

£386.24

Average price for this repair in London in the last 30 days^

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for an alternator repair?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running.

Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in London

Our top pick

RAC Mobile Mechanic in London

At the RAC, we’ve got over 125 years’ experience in offering complete peace of mind to our members. We’re best known for our breakdown service. And now – our new RAC Mobile Mechanics are here to help make every day motoring easier. If you need a service or repair, they’ll come to you at your home or work.

Book an alternator repair

If your car’s battery keeps dying or electrical systems are acting up, it could be a faulty alternator. Your alternator should charge the battery properly, and if it doesn’t, you could need an alternator repair.

We use original equipment manufacturer (OEM) standard parts, which means every new part will be the same standard and same quality as the original part it replaced.
Our mobile mechanics are friendly, honest, and backed by the RAC.
Close up of an RAC Mobile Mechanic running a vehicle diagnostic check

Book a diagnostic

For when you know something isn’t right, but you’re not sure what – our mobile mechanics are here to help.

We’ll look for any mechanical or electrical problems. If we need to, we’ll also check your car’s onboard engine management system. Depending on your car and issue, this will usually include: – Engine – Power steering – Brakes – Transmission – Exhaust system – Fuel injection system – Cooling system and air flow – Sensors
If we detect any issues, we'll talk through what needs to be repaired. We’ll give you a no-obligation quote to fix it on the spot, if we can. Or we’ll recommend a local RAC Approved Garage, and give you a full error report to take there.

And it’s not just alternator repairs that we do in London

Mobile mechanics bring the garage to you, saving you the hassle of getting your car to a garage. If you need a service or repair, they’ll come to you at your home or work.

Try one of our RAC Approved Garages

Millennium Garages Ltd - RAC Approved Garage

5.0/5

Millennium Garages is based in Southwark, London offering MOTs, Services and Car Repairs using industry-standard equipment and fully trained staff with over 40 years of experience in the motor industry. Since 2019, Millennium Garages Ltd has been a RAC Approved Garage. ALL Customers, Including RAC Warranties, are responsible for paying Congestion Charge and ULEZ when required for their vehicles.
Arches 43 - 47, Kings Bench Street, London, SE10QX

Andrews garage

4.7/5

Established since 1974 Andrews Garage has been serving the local area for all its car related needs, such as, MOT'S, Servicing, Tyres, Bodywork (crash repairs), 3D 4 Wheel alignment, Air conditioning Re-gassing.
30-36 Padfield Road, London, SE59AA

Tyre World & MOT Station

4.6/5

TYRE WORLD WAS ESTABLISHED IN 1992 TO PROVIDE MOTOR VEHICLE SERVICE AND GREAT TYRE SERVICE IN LOCAL AREA. We do following services: 1. 4 Wheel 3D Alignment. 2. Tyre 3. MOT 4. Tyre Replacement 5. Mechanical Work
10-11 Williams Buildings, Bethnal Green, London, E20LF

West Hampstead Motors Ltd

4.5/5

Established in 1975. West Hampstead Motors Ltd. are expert in the servicing and repair of both classic and modern German vehicles. We specialise in Audi, BMW, Mercedes Benz, Porsche and VW cars. Alongside the service centre, our state of the art approved bodyshop undertakes all aspects of body work and restoration to the highest of standards.
155-161, Grafton Road, Gospel Oak, NW5 4AY

MNS Autos Ltd

4.2/5

At MNS Autos, we are dedicated to keeping our customers on the road. Our commitment lies in providing a fully comprehensive service that our customers deserve. We pride ourselves on delivering quality workmanship, using only approved parts, all at competitive prices. We welcome you to try us out and see yourself the difference. Thank you
196 Barnardo Street, London, E10LL

Frequently asked questions about car alternator repairs

Driving with a bad alternator isn't a good idea. A failing alternator can make the battery drain fast, leading to a breakdown. Electrical parts may also stop working, which can be unsafe. It’s best to get the alternator checked and fixed or replaced as soon as you can.

When the alternator fails, the battery won't charge and will drain. This can make the car stall and prevent it from starting. Electrical parts like lights, radio, and power windows may stop working. Get help from a mechanic right away to avoid more damage.

Alternator reconditioning means fixing an old alternator by replacing worn-out parts. This can be cheaper than buying a new one, but it may not last as long as a new alternator.

The cost of an alternator varies by the type of car and the quality of the alternator. To know exactly how much, you should talk to your local mechanic.

Yes, alternators can be repaired if the damage isn't too bad. If the alternator is very damaged, it may be better to replace it.

Replacing an alternator is often worth it if the alternator is old or very damaged. A new or rebuilt alternator can work better and prevent future problems. Talk to a mechanic to help make the best choice.

Alternators usually last between 80,000 and 150,000 miles. But it can vary based on where and how you drive, and maintenance. Regular check-ups and fixing problems early can help it last longer.

Some alternator repairs or replacements may be covered under the car’s warranty, especially if the car is still new. Check your warranty details or talk to your mechanic to see if it's is covered.

They’re often not covered by standard car insurance policies because they're thought to be part of your vehicle's upkeep. But, if it's damaged in an accident, it might be covered.

You need an alternator replacement when it's very damaged or has worn-out parts that can't be fixed. If it's not keeping the battery charged or causes electrical issues, you'll need to replace it.