Spare parts to keep handy.

As we all know there is some small parts that are easily roadside swapped and cheap enough to have a spare for in the glove or jeep toolbox. These are also show stopper, things that strand you if they fail. I was thinking we could compile a list of them. Maybe there already is a list somewhere but I havn't found it.

I'm not talking trail spares BTW, although those would be fine too. I'm talking small electrical stuff mostly that kill a jeep. Two I know of are.

CPS crank position sensor
Fuel ballast resistor

Is there any others that I should carry with me just in case?

I keep a M-10 screw in the glove box. I had the oil pressure sender fail, losing all oil. I backed the sender out and replaced it w/ a M-10 until a new sender was purchased.