It is definitely not a legitimate reason to fail an mot. (The only relevance of a km speedo in an mot is that the Vosa computer system gives the mot tester the option of entering whether the odometer reads in miles or kilometers). Ask the tester to show you where in the tester's manual it shows it as a "reason for refusal". (You can see the tester's manual for yourself online: I'll see if I can find the url and post it here later)The car was rejected for MOT without the correct speedometer. I am confused! I would be grateful to know what to do next.
Here it is:.........(You can see the tester's manual for yourself online: I'll see if I can find the url and post it here later)
When I had my LHD registered in the UK in 1995 I had to take it to the DVLA regional office to have it verified before they would issue a V5 and UK registration number. They checked it very carefully including the chassis number (inside the RH door), the new headlights AND the speedo. The car already had a UK MOT, but it seemed that the miles/km speedo was a requirement for UK registration (individual Type Approval).
The rules may have changed now but I'd have though it would be worth changing the speedo if possible. If for no other reason, you can read the speed in miles immediately rather than having to do a quick calculation (and thus diverting brain-power from the task of concentrating on driving).
Probably simply swopping the front glass would do, although the odometer would of course continue to register in Km.
""In summary the system these days that doesn't cover any speedo stuff - it's only the MOT that look at the car and it is not part of the MOT test. The MOT tester who rejected this car was wrong to do so.