GTA Diagnostix Ltd

Welcome to

Servicing, Diagnostics, MOT's, Tyres, Alignment

Our Specialties

Here at GTA Diagnostix Ltd, we specialise in Mercedes Benz, BMW, Volkswagen, Audi, Seat & Skoda.

Independent Garage

We are an independent garage based in Porthmadog, Gwynedd, established in 2006.

Quality Service

Our experience covers more than 16 years Mercedes Benz, Audi and Volkswagen dealership training.

The ECU remapping includes a free health check of all the main running control units on your vehicle.

Are You Interested in Our Services?

Our Reviews

These are life savers! Our car lost power on our last day of our holiday in the area, I called in, was told that although they were busy they would see what they would do. A few hours wander around Porthmadog later and our car was fixed with recommendations on what to do to fully alleviate the problem.
Thanks so much, highly recommended!

Took my VW Caddy in with an intermittent problem causing the van to go into limp mode. The problem was diagnosed quickly and fixed with genuine parts. The garage dealt with the myself and the van in a very efficient and courteous manner. I shall be using GTA for all my future service and repairs.

GTA were fantastic this week. We were on holiday and our electric windows got stuck down - which is a big problem when you're camping. Not only did they get us out of a jam, they fixed it in a jiffy, at a very low price and to boot, solved a hard to find intermittent problem that had defeated 2 garages before. Friendly and kind too. Thanks very much guys!

Top garage We encountered a brake problem the day before we travelled home from holiday. Managed to get the car to them at 3pm and it was done by 5pm. Very thorough diagnostic and feedback. Great service and many thanks.

‘We ensure that all our customers receive a first class service at competitive prices by our experienced team. We focus on personalised customer service, ensuring our prices are transparent and above all we guarantee quality work by our friendly team.’

- GTA Diagnostix Ltd

Our Services

- All mechanical work

- Class IV MOT

- Diagnostic electrical & mechanical

- Automatic gear boxes

Opening Hours

Monday

Tuesday

Wednesday

Thursday

Friday

8:30am - 5pm

8:30am - 5pm
8:30am - 5pm
8:30am - 5pm

8:30am - 5pm

Contact Us

Madog Motor Museum,

Snowdon Street

Porthmadog,

Gwynedd

LL49 9DF

Saturday

Sunday

By Prior Arrangement

Closed

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