OK, I got the Miata thermoswitch (N-3500-18-840) for my '93. It doesn't fit - duh! the car has a reman engine - and I think the water pump housing, etc., was changed sometime during the '94 production year. I don't know what year my reman or water pump housing was made. Anyone know if a later Miata thermoswitch will fit or not?

 

Are you sure that you are talking for the right hole?Its the one below the green plug....

 

yup

 

I also have a Miata Thermoswitch on the way and just installed my reman. I guess I cant use it either. Is there an alternative?

 

same as N350-18-840 that I got?

 

yeah im interested too.... i need one

 

I'll have to look again to make sure about that production code...