Gaskets should be available from Mx5parts yes.
Bearings are ΝΤΝ 4Τ - 32008, they cost 30 euros for both.
Mazda charges 160 euros for both.
It is not mandatory to change no, but for 30 euros, its not worth NOT CHANGING, as if after the installation there is a noise or something, the labor costs needed to get the diff housing out again, would be 5 times more.
I ve kept mine with no problem though, but if I knew the NTN price I would have changed them.
A.
Bearings are ΝΤΝ 4Τ - 32008, they cost 30 euros for both.
Mazda charges 160 euros for both.
It is not mandatory to change no, but for 30 euros, its not worth NOT CHANGING, as if after the installation there is a noise or something, the labor costs needed to get the diff housing out again, would be 5 times more.
I ve kept mine with no problem though, but if I knew the NTN price I would have changed them.
A.