im replaceing the o2 sencer on the 87 rx7 gxl and im doing the on right by the exhaust manifold is there more then one because the on i got from the part store dosent match and i already cut the wire i mean it was for the year and make i have but the part that goes in the exhaust looks diffrent please let me know..

 

Just one O2 sensor. Take the old one out and check thread size. Use a male/female connector for the wire.

 

thanks i guess its just diffrent brands