Sumner Automotive Diagnostics

Mobile Auto Electricians

Corporation Rd, Cardiff, CF11 7AS Directions

Tel 07908 320001
   Now closed Open today 09:00 - 17:00

Why Choose Us?

Family Run Business
Extensive Knowledge
Reliable Service

Business overview

Due to high demand for our services we are only able to cater for Trade & Business Customers at the moment. We apologise for any inconvenience.

Are your car’s electrical systems not working? Visit Sumner Automotive Diagnostics for full automotive diagnostics. We have over 50 years experience and have in-depth knowledge of all makes and models of cars. With our well-equipped repair van, we can diagnose and repair most cars on the road. All you need to do is give us a call describing your car problems. We’ll dispatch our team for on-site repair services anywhere in Cardiff.

As a car garage, we can handle

Carbon cleaning

Automotive diagnostics

Engine management

Electrical systems

ABS and airbag related issues

General car electrical repairs

Products & Services

Brake and clutches

Exhaust systems

Fuel economy

Electrical faults

Engine carbon cleaning

Starter motors and alternators

Emergency lighting and indicators


Heating and air conditioning

Cameras and sensors

Horns, LEDs and dashboard lighting

Car wiring


Best auto electrician in Cardiff

Highly recommended! Genuine, trustworthy, friendly, helpful, great prices & extremely informative. Will definatly be using again and recommending to all, if I have any more car troubles I know who to call. Thanks Elijah!
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Top service highly recommended

Top service, taken to 2 other auto electrical diagnostics and couldn’t diagnose the problem, took to this place was here for 15 minutes with problem diagnosed and fixed within 40 mins
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That's How You Run a Business !!

Got to say ! Much respect to Elijah ! although he couldn't fit me in as to his busy schedule, he phoned me back and helped me over the phone to try and solve the problem. That is how you run a business and although I haven't met him YET, I would definitely recommend him if you are in the trade or in business. Spot on service !! Respect my friend !! Thanks for your help bro !
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Very professional and knowledgeable
Can’t fault Elijah for his calm manner and willingness to help. Highly recommend
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Honest and reliable - Very skilled

Absolutely fantastic. Eli is a top guy and a gentlemen. He has solved my car electrical issues on two occasions and solved the matter immediately. He came immediately. Honest and reliable. I will definitely recommend and will always use again! thanks Eli, i appreciate it.
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