Press and hold both lock and unlock bottons together for three seconds. Then red indicator blinks twice that means smart key starts sleeping. Push either lock or unlock botton to wake it up.
In Japan, it works. The key might be different from JPN one.
There is no oil temp sensor in FL5. The oil temp is a guess based on water temp. If you really care about oil temp, you should install oil temp gauge first.
The problems of radiators including stock and others are that entrance and exit are on the vertical straight line. It should be diagonal...
Have you checked the tire pressure as someone told above?
It is very important if you change tire profile and load index.
I just calculated appropriate tire pressure.
If you change stock 265/30R19 to 265/35R18,
appropriate TP should go down from F34psi R32psi to F27 R25.
These numbers are based...