An RAC Mobile Mechanic using a diagnostic machine inspecting a car for an alternator repair.A mechanic using a diagnostic machine to inspect a car vehicle engine
Service, Repairs & MOT

Alternator repair in Watford

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

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

£449.86

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

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for an alternator repair?

With RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage. They can do an alternator repair on your driveway, so you don't even need to leave the house.

All our alternators are OEM standards, that means we only use parts that meet your vehicle manufacturer’s strict quality criteria, ensuring top quality and reliability. With a 12-month guarantee, you can trust our replacement alternators to last. The price includes fitting – no hidden costs. Just friendly, honest experts.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Watford

We’ll come to you at home or work

RAC Mobile Mechanic in Watford

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.

An RAC Mobile Mechanic using a diagnostic machine inspecting a car for an alternator repair.

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

Vehicle diagnostic check

£99

We’ll spend up to 30 mins checking our car’s onboard management system for faults. We’ll talk you through repairs needed and provide a full report. If any further work is needed, we’ll agree this with you before we start. Any additional work after the first 30 minutes will be priced at £20 per 15 minutes. We’ll agree this with you before proceeding.

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.

Average cost of an alternator repair by car make^

The cost to repair your car alternator will depend on the car you drive. According to RAC data, the average cost to repair a car alternator is £458. But you can check out the average price of an alternator repair for your specific car make here.

Make

Average Price

Ford

£435

Volkswagen

£466

Vauxhall

£436

Nissan

£478

Toyota

£417

BMW

£495

Peugeot

£469

Renault

£477

Mercedes-Benz

£525

Citroen

£445

^Average price quoted for RAC Mobile Mechanics from 01/01/25 to 31/03/25.


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

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.

A close up of an RAC mobile mechanic looking under the hood of a car

Try one of our RAC Approved Garages

ACS Autowerks Limited

5.0/5

ACS AUTOWERKS first began in 1991 in West Drayton at a basic but functional workshop site. Many of you reading this may have been to see us at the original site and we thank you for your continued custom. For 17 years the company grew in knowledge, expertise and experience. Specialising in German Vehicles enabled our team to gain extensive knowledge in all areas of the German motor vehicle. Specialising heavily in BMW, Mercedes and Porsche has pushed ACS AUTOWERKS to the forefront of vehicle technology.Our bodyshop works to the highest standard and will treat every vehicle with the same respect and care as we do our own. We are able to offer repairs of any nature including insurance work. We also specialise in non fault accident claims and can assist you every step of the way to get your vehicle back on the road.
Unit 2 Chancerygate Industrial Centre, Horton Close, West Drayton, UB7 8EB

Hertfordshire Vehicle Services

4.7/5

Fast, professional and reliable service for the motorists of Hatfield, Welwyn Garden City and surrounding areas. Mechanical repairs and servicing undertaken on all makes & models of cars and light commercials. Diagnostics services also available, with the latest up to date equipment on the market alongside the general services we also specialise in DPF. WE WELCOME PRIVATE, FLEETS, TAXIS AND TRADE CUSTOMERS When it comes to looking after your car, look no further than HVS - our commitment to customer service makes us the obvious choice.
21 Fiddle Bridge Lane, Hatfield, AL100SP

RSC Ltd.

4.5/5

We have on site a fully equipped three ramp workshop. Our work shop philosophy is very old school, we will never carry out any work to your vehicle unless it is needed, always ask your permission to carry out any work up and above what has been agreed and do our utmost to give a fair and reasonable cost service at all times. As a result of this we have a loyal database of customers from Rickmansworth, Watford, Northwood, Hatch end, Bushy and surrounding area. We offer a wide variety of services at an extremely competitive rate especially when compared to the main dealers, these include: servicing, repairs, bodywork, tracking, tyres, air conditioning re gasses, clutches, brakes, exhausts, car audio and alarms.
Oxhey Drive, South Oxhey, Watford, WD197SE

Nash Mills MOT & Service Centre

3.8/5

At Nash Mills we are a young and progressive company located on the boundaries of Hemel Hempstead and further afield, such as in - St. Albans - Watford - Hatfield - Berkhamsted -Kings Langley We've been trading in the local Hertfordshire area since September 2013 and we have an excellent reputation for being one of the friendliest and most reliable garages in the county. Our, team combines 60 years of trade experience to deliver a complete range of repair and services for all make cars and vans. We carry all the latest diagnostics equipment, so we're able to diagnose all sorts of faults, as well as carrying out the more common repair types, such as: - Servicing - Mots - Engine diagnostics - Repairs When you need reliable commercial and regular vehicle services in and around Hertfordshire get in touch with Nash Mills MOT & Service centre on whocanfixmycar.com! At Eurorepar Car Service, we’re all about keeping you and your car moving with confidence. As a trusted network of local garages, we provide high-quality car maintenance and repairs tailored to your needs – all at competitive prices. With our exclusive Brakes for Life program and a 2-year parts and labour warranty, you can drive away knowing you’re covered for the long haul.* Ask your Eurorepar Car Service Centre to fit Eurorepar branded parts to qualify. Claims under the 2-year parts and labour warranty must be made at a Eurorepar Car Service Centre. Discover expert care, unbeatable value, and peace of mind – all under one roof. Ready to experience the Eurorepar difference? Request a quote or give us a call today! *Terms and conditions apply.
Nash Mills Mot And Service Centre, Rear Of - 194A Belswains Lane, Hemel Hempstead, HP39XA

Halt Motor Company

3.6/5

David Bux started Halt Motor Company in 1979 and it is now a well-established family business, with sons James and Charles now running the workshop full-time.  HMC has been specialising in quality used cars since 1984 and all aspects of after-sales, including servicing, repairs and MOTs.  As a proffesional car care centre, we have the latest equipment, which allows our qualified mechanics to diagnose any problems quickly. We have recently invested in more diagnostic equipment that will help us to rectify any problems you may have with your car more efficiently.
Unit 1, Hurricane Trading Estate, London, NW9 5QW

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 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.