Use your eyes, if the bolt head is on the top and the suspension plate traps it you are likely there. Maybe not on these, the '11 model shows the bolt head on bottom. Same chassis I'm thinking.
The strength, or property class should be on the bolt head. Not necessary to change them even by Nissan as they are not TTY bolts and can be retorqued more than once, your issue would be if the bolt does not seem to pull up tight then it would need replacing or say corrosion damage.
The strength, or property class should be on the bolt head. Not necessary to change them even by Nissan as they are not TTY bolts and can be retorqued more than once, your issue would be if the bolt does not seem to pull up tight then it would need replacing or say corrosion damage.