About Car Alarm & Radio Services
About C.A.R.S.Mobile Auto Electrical Specialists
Mark Halliday – Founder of Car Alarm & Radio Services
Auto Electrical & Diagnostics Specialist
35+ years of experience.
Auto Electrical & Diagnostics Specialist
35+ years of experience.
Since 1990 At Car Alarm & Radio Services (C.A.R.S.).
we've been solving vehicle electrical problems for motorists across Wiltshire and Gloucestershire for more than 35 years.
Founded in 1990 by Mark Halliday, the business was built around one simple idea:
Provide honest, professional auto electrical repairs without unnecessary parts replacement or expensive guesswork.
More than three decades later, that philosophy remains exactly the same.
A Different Kind of Auto Electrician
Modern vehicles rely on dozens of electronic control units connected by thousands of wires and sensors.
When something goes wrong, replacing parts isn't always the answer.
Our approach is simple:
Don't Guess. Test.
Using professional dealer-level diagnostic equipment together with over 35 years of experience, we accurately identify the fault before recommending any repair.
That often saves our customers hundreds of pounds compared with replacing parts unnecessarily.
When something goes wrong, replacing parts isn't always the answer.
Our approach is simple:
Don't Guess. Test.
Using professional dealer-level diagnostic equipment together with over 35 years of experience, we accurately identify the fault before recommending any repair.
That often saves our customers hundreds of pounds compared with replacing parts unnecessarily.
A Family Business You Can Trust
C.A.R.S. isn't a national chain.
We're a family-run business.
When you contact us you'll usually speak to Ursula, (a very nice lady)who manages bookings and keeps everything organised.
When we arrive, you'll meet Mark, who personally carries out the diagnostics repairs and installations.
That means you always deal directly with the people who own the business, giving you a personal, honest service from start to finish.
When you contact us you'll usually speak to Ursula, (a very nice lady)who manages bookings and keeps everything organised.
When we arrive, you'll meet Mark, who personally carries out the diagnostics repairs and installations.
That means you always deal directly with the people who own the business, giving you a personal, honest service from start to finish.
Specialists in Vehicle Electronics Over the years we've evolved with vehicle technology.
While we originally specialised in vehicle security systems, today's vehicles demand a completely different skill set.
Our work now includes:
Our work now includes:
- Auto electrical fault finding
- Advanced vehicle diagnostics
- Dash cam installations
- Reverse camera installations
- ECU & immobiliser repairs
- Ford body control module& fusebox repairs
- Peugeot & Citroën body system interface repairs
- BMW FRM3 repairs
- Ford instrument cluster repairs
- Fiat airbag module repairs
- Spare car keys
- Volkswagen & Audi radio screen replacements.
Why Customers Choose Us✔
Established Since 1990
Over 35 years of hands-on auto electrical experience.
✔ Fully Mobile
We come directly to your home or workplace.
✔ Family Run
Personal service from people who genuinely care about their reputation.
✔ Honest Advice
We'll always repair where practical before recommending replacement.
✔ Professional Diagnostics
Dealer-level equipment combined with decades of real-world experience.
Over 35 years of hands-on auto electrical experience.
✔ Fully Mobile
We come directly to your home or workplace.
✔ Family Run
Personal service from people who genuinely care about their reputation.
✔ Honest Advice
We'll always repair where practical before recommending replacement.
✔ Professional Diagnostics
Dealer-level equipment combined with decades of real-world experience.
✔ No VAT One less cost for our customers.
NO VAT TO PAY ON ANYTHING
Diagnosis comes before replacement.
We Believe in Repairing, Not Guessing One of the things that frustrates us most is seeing customers spend hundreds of pounds replacing perfectly good parts because the original fault wasn't diagnosed correctly.
A broken wire, damaged connector or poor earth can often produce the same symptoms as a failed control module.
That's why we always begin with professional testing rather than guesswork.
Because in auto electrics...
Diagnosis comes before replacement.
Proud of Our Reputation Our business has grown almost entirely through recommendations and customer reviews.
Every vehicle is treated with the same care and attention we'd expect on our own.
We're proud of the reputation we've built since 1990 and work hard every day to maintain it.
Covering Wiltshire & Gloucestershire We provide a fully mobile service covering:
Need Our Help?
Whether you're dealing with an intermittent electrical fault, a dashboard warning light, a failed control module or simply need professional advice, we're here to help.
A broken wire, damaged connector or poor earth can often produce the same symptoms as a failed control module.
That's why we always begin with professional testing rather than guesswork.
Because in auto electrics...
Diagnosis comes before replacement.
Proud of Our Reputation Our business has grown almost entirely through recommendations and customer reviews.
Every vehicle is treated with the same care and attention we'd expect on our own.
We're proud of the reputation we've built since 1990 and work hard every day to maintain it.
Covering Wiltshire & Gloucestershire We provide a fully mobile service covering:
- Wiltshire
- Gloucestershire
Need Our Help?
Whether you're dealing with an intermittent electrical fault, a dashboard warning light, a failed control module or simply need professional advice, we're here to help.
And don't forget
Don’t Guess Test
