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 Trowbridge

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

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

£426.04

Average price for this repair in Trowbridge 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 Trowbridge

We’ll come to you at home or work

RAC Mobile Mechanic in Trowbridge

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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 Trowbridge

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

Ricky Fenby Ltd

Here at Ricky Fenby we specialise in used van sales, class 4 and 7 MOT's and all forms of mechanical repairs, maintenance and servicing work. We have a team of three very highly skilled technicians, with main dealer experience and an auto electrician. ready to tackle your motoring needs. We are also RAC approved which means that we adhere to a strict code of conduct at all times and are audited on a yearly basis. We offer the following services; Servicing MOT Testing Class 4 & 7 Diagnostics Clutches Air Conditioning Recovery Available Tyres & Exhausts Lazer Wheel Alignment Timing Belts General Repairs Collection & Delivery Service Available Fully Equipped Mobile Workshop
Unit F1 Southgate, Commerce Park, Frome, BA112RY

Idover Garage

Idover Garage is a local, family run business with over 35 years in the business. Founder and Director Kevin Connor and his team have built an excellent reputation for providing top quality car repairs, servicing, MOT inspections, state of the art diagnostic and much more. Being based in the humble village of Dauntsey, we serve across Malmesbury, Chippenham, Royal-Wootton-Bassett, Cirencester, Swindon, Tetbury and the surrounding areas within a 20-mile radius. We offer a range of services including car repair, MOTs and car servicing with free collection and delivery. Our prices are very competitive and we pride ourselves on being reliable and helpful with good customer service. Call us today or use the online form to contact us for a free, no obligation quote. Our modern fully-equipped workshop, staffed by trained technicians, is in Dauntsey, Wiltshire, near the major towns of Chippenham and Malmesbury. We serve the SN15 postcode district, caring for vehicles from all the surrounding areas including Great & Little Somerford, Brinkworth, Royal Wootton Bassett, Lyneham, Foxham, Lea, Startley, Cleverton, Garsdon, Upper Seagry, Corston, Christian Malford and Rodbourne. We offer comprehensive vehicle repairs and servicing, MOTs, welding and fabrication, diagnostics and fitting new tyres, batteries and exhausts.
Unit 11 Idover Business Park, Dauntsy, Chippenham, SN154JJ

Wiltshire Tyre and Autocentre (Chippenham)

Wiltshire Tyres operates a mobile tyre service specialising in the supply and fitting of tyres including car, van, 4x4 and run flat tyres at your home or work address. We have a network of warehouses stocking thousands of great value tyres from all the major tyre brands. Simply choose your tyres, book online then one of our highly trained tyre fitters will appear at your door. We make buying and fitting new tyres in Wiltshire that easy!
Wiltshire Tyre And Autocentre Chippenham, London Road, Chippenham, SN153AZ

Monster Gear Garage

We are an independent 5 star garage with high experienced technicians that will take care of your vehicle, we cover a wide range of repairs like: MOT MOT repairs Servicing Air Con Regas Air Con Recharge Brakes Tyres Clutches Timing belt / chain replacements Diagnostics Engine repairs / replacement Drive in with no appointment. If you wish to wait while your car is being repaired we have a luxury waiting area with TV, Wi-Fi and free hot drinks. Our garage is a comfortable place for you and your vehicle.
Bridge Road Ind Est, Unit 16 - 18, Bristol, BS154TA

GR Auto Services Ltd

We are one of the largest family owned independent garages in Yate, near Bristol. GR Auto Services have been servicing, carrying out MOT's and repairing most makes and models locally for over 20 years. We score highly with our customer service surveys. Our customer satisfaction rate can be seen on the Good Garage Scheme website and it averages between 96 - 97%. GR Auto Services received an award in 2012 from a major lease company for over 15 years of exceptional service to them and their customers. Our receptionist boasts both male and female staff, and we offer a collection and delivery service with in a 6 mile radius. We use 3 diagnostic computers so we are very strong on engine diagnostics with most makes and models. 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.
24 North Road, Yate, Bristol, BS377PA

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.