Identify this component? Temperature-related?
It is a thermistor.

I am posting HOW I found out, for any future readers:

The answer wasn't forthcoming by visual inspection of exchange members, and my prior Googling had not yielded useful results.

The problem was that I and others here were focused on the picture of the part itself. I changed focus to the printer (in my case a Brother HL-5240), and any documentation I could find.

I accidentally found the service manual for it. In that manual were the circuit diagrams. It took a very long time for me to read through them and figure out how to follow the circuit as it went through a few different drawings. (I'm a novice and this is the first large diagram I've tried to use - 9 pages of drawings!).

Eventually I found a symbol for a thermistor (the resistor zigzag symbol inside a closed oval), and googled the number next to it: "TP835". And sure enough - I got Google hits with pictures of similar parts. Had to look at a bunch, and eventually I found matching items.