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 Brentwood

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

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

£456.79

Average price for this repair in Brentwood 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 Brentwood

We’ll come to you at home or work

RAC Mobile Mechanic in Brentwood

CDRSD-703_SEO500_-_Location_Page_-_Top_Pick_-_800x450.webp

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 your 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 Brentwood

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

In Front Autos Ltd

In Front Autos was established in 1994, We have a vast wealth of experience with most makes & models of cars & LCV's. We are members of the RMI, Bosch Auto crew, Lex Autolease preferred, Ford Blue oval club. Also a MOT class 4 test centre. Our services include, Air conditioning, Electronic Diagnosis & Full vehicle digital geometry.
8 Avenue Industrial Estate, Gallows Corner, Romford, RM30BY

BB Motors Solution Ltd TA Platinum Motoring.

Established in 2008 with over 7 years of experience, we are a well-known, locally run business based in Romford. We pride ourselves on providing an honest and reliable service throughout the local area. We are a small team of qualified and experienced mechanics offering a complete range of garage services. We undertake all car servicing and provide quality MOT testing and repairs as well as computer Diagnostics for all make and models As testament to the high standard of service and workmanship that we provide, we maintain many repeat customers and are highly recommended across the local Romford and Gidea park area. Want to find out if we can help you? Are you looking for a free estimate? Please feel free to contact us today.
376-392 Brentwood Road, Romford, Essex, RM25TD

AJ Servicing & Repairs.

AJ Servicing and Repair centre (formerly Moorings Garage) was taken over in 2013 by a group of main dealer management and technical personnel. The team have over 100 years of main dealer experience between them and offer the best main dealer alternative for all makes and models. AJ Servicing & Repairs provide Car MOT, Car Service, Car Repair services and Tyres in and around Essex including Harold Wood, Harold Hill, Romford, Gidea Park, Brentwood, Cranham, Hornchurch, Upminster, Billericay, Ingrave, Dunton, Bulphan, Warley, Herongate, Ingrave, Essex and beyond! The workshop has to hand the latest computerised technology and testing equipment for all makes of vehicles and is authorised under the government block exemption ruling to service all vehicles and still validate manufacturers warranties. We provide all types of car tyres and van tyres at very competitive prices and include wheel balancing services as well. We take pride in our quality workmanship and honest pricing policy and ensure that our highly trained technicians carry out all works not leaving the servicing to apprentices or semi skilled mechanics. All parts fitted are guaranteed and only the best quality parts are fitted . No additional work is carried out without prior approval thereby not giving any shocks on collection. Services available at this garage are : MOT Test (by appointment only) Engine tuning Suspension Servicing all makes Electronics Gearboxes Brakes Diagnostics Automatic transmission Exhaust Steering
The Moorings Garage, Arterial Road, Hornchurch, RM113UB

L V GROUP MOT AND SERVICE CENTRE LTD

L V GROUP MOT AND SERVICE CENTRE LTD MOTS TYRES BRAKES DIAGNOSTICS SERVICING ENGINE REBUILDS BODY SHOP AIR CON
Unit 4 Newlands End, Basildon, Essex, SS156DU

RJ PERFORMANCE LTD

Our Mission At RJ Performance, our mission is to provide top-quality auto repair services that exceed customer expectations. We believe in transparency, honesty, and delivering exceptional value to every client.
Hjbvgfthgb, Bhjvg, Mvgcff, RM68JY

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.