without the usage of a scanner

The last major service performed was at 60,000 miles.
But since that service, oil changes have been performed, drive shaft assembly replaces, coolant pipes replaced, and both fuel pumps replaced. I recently replaced the 2 front air filters as well as the pollen cabin air filter.
I wanted to know if I should replace the spark plugs, serpentine belt, thermostat, and anything else you recommend. As I said, no major service had been done except for oil and air filter changes.
Thanks so much!!


I bought the car about 1 week ago and already those 2 sensor warning came on, as well as a 'monitoring off' and front left light wanrning.
I looked underneath the car and on both sides, in the mid area at the edge, it looks like oil has leaked out of somewhere...it is dry but i can see it on both sides.
How serious are these warnings that I have mentioned above??

sometims it shift manual and ome times even if i select manual control it wont shift

I was nstalling a new front license plate cover and needed to use longer screws. The screw went through a hose located directly behind the existing hole. What hose is it? It has to be a plastic or rubber hose as it left balck on the screw, it appears to be windshield washer fluid leaking out!