Gta Diagnostix Limited
MOT testing station in Porthmadog. Gta Diagnostix Limited, Madog Motor Museum, Snowdon Street, Porthmadog, LL49 9DF. Phone and vehicle classes from DVSA's published list of active MOT testing stations.
Garage list from DVSA's published list of active MOT testing stations. Not a government service.
List updated 30 September 2026.
Madog Motor Museum
Snowdon Street
Porthmadog
LL49 9DF
Phone: 01766 515558
Site number: V107678
Vehicle classes
- Class 4: cars (up to 8 passenger seats) and other class 4 vehicles
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MOTCheck does not list test prices. The legal maximum fee for a car MOT (class 4, up to 8 passenger seats) is £54.85. A station can charge less.