This upper timing cover with seals installs on the front or your engine. If you are replacing your timing belt/water pump and this part is damaged then It would be a good time to swap this out
If your engine has ever had any oil leaks from from the cam seals then chances are your seals will be swollen and soft.
This is a GENUINE MAZDA part
Suits SVT engind only (NB8B/C 2000-2004)