Very top right relay above the fusebox to the left of the clutch.
Above the three horizontal relays.
its located above the passenger fuse box next to the clutch the top relay above the 3 other relays.
it is located in the frunk on the left hand side
I have a 2002 MR2 Spyder. The tail light relay is behind the fuses box on the left side of dash S H
put the turn signal on, get out of the car and see if it works :-)
The O2 sensor is located on the downpipe of the MR2, although you were not specific to which MR2 generation/model you are referring to. Most are located there. The downpipe will be bolted to the exhaust manifold, which is bolted to the side of the motor closest to the firewall.
its in the trunk behind the back carpet next to the ecu
in the tank
Behind the luggage compartment
by the oil dip stick
that is the oxygen sensor on the exhause manifold.
under the hood behind the spare tire.
behind the dashboard on the passengers side