Part Number Last Three Letters

[Daz7827]

Hello All,

 

Could anyone please tell me what the last three letters mean on the part numbers, my reason for asking is I am looking at buying a new speedo due to it not registering speed and the fuel beep keeps going off. I have changed the speed sensor and cleaned all the earth points I could find but to no avail. So looking through this site it looks like it is the clocks so I am now waiting to try this but I am worried about buying the wrong clocks. My Part number is YM21 10849 AGC

 

Any help is appreciated

 

Thanks

 

Daz