A local garage has repaired my mums dashboard on her fiesta using a second hand one. The milage was previously 44000 miles and since the dash has been replaced it is now showing over 150000 miles! We have questioned the garage and they said there is nothing they can do but will provide a covering letter for the MOT. This sounds completely mad to me, has anyone got any ideas? It is a ford fiesta with a digital milage reading.

thanks