I just bought a Pathfinder R51 from 2006, 4.0 liter petrol. I live in Qatar so we use it mainly for dune bashing

It has already 198000 km, but sounds solid. Today I serviced the rear and front diff oil, transmission and engine oil.
to do: new tires and wheel alignment, new spare tire rim, new hood gas dampers, cigaret lighter and 12v power seem not to work, electric mirrors are not working in all directions.
I noticed that the A/T cooling is still linked to the radiator, what do you think with 50 celsius temperature here, can I still bypass or is it better to buy an aftermarket oil cooler.