What common sensors to replace?

[Camrymatic]

I know there are some sensors out there that go bad every once in a while on a car. All I can think of is the O2 sensor, but I am betting there are a few more. I have a bone stock 5sfe in pretty good condition (not leaking oil or smoking or making noises). My only complaint is that the gas mileage is a little low in the city for me (about 18mpg) but I also take it up to 3.5-4k every time I accelerate and have not done fuel filter and spark plugs for 90k miles.
But as far as sensors go, what are the common ones to check and replace?

[PhantomZX]

You can try cleaning the MAF sensor if the car has one - but be very careful.

Possibly water temperature sensors as well...

[Dave's]

My '92 gen 3 I4 now has 240K miles with no sensor changes. But I have noticed the MPG has dropped quite a bit lately. Still runs OK tho.

[marc780]

Camrymatic perhaps you answered your own question; change your fuel filter and plugs, they are way overdue.
Also try cleaning your tbi and butterfly, theyre probably filthy by now. Plenty of posts on this some by me.