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Found T4 diagnostics garage that is not on usual list by Ed3


Ed3
In case it is of use I saw a post that was placed years ago on a classic car forum that said the Three Arches Garage in Cardiff had T4 (Testbook version 4.Computer Diagnostic System) diagnostics. I rang the Three Arches and the lady said that they still have the T4 equipment but it has not been switched on for a long time so they will need to switch it on. They charge £60 all in and need 2 weeks notice.
https://www.threearchesservices.co.uk/

Posted 24 Apr 2026, 23:06 #1 

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takestock
Nice to know, thankyou
Welcome to all who have managed to migrate ;)

Dave....

Posted 28 Apr 2026, 16:15 #2 

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Duncan
Always good to know. But what is 'the usual list'?
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Posted 28 Apr 2026, 18:26 #3 


Ed3
Regards the usual list - On various Rover or MG forums there are maps like this one.
https://rover200.org.uk/forums/topic?p=86276

https://www.google.com/maps/d/viewer?mi ... 083303&z=6

Posted 29 Apr 2026, 16:17 #4 

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Duncan
Ah, OK but wasn't aware of that. TBF though it looks quite out of date. And being 'the OC' would never have been inclusive.
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Posted 29 Apr 2026, 17:01 #5 

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