Warp openers/closers that can only be repaired at a space yard.

[Puke]

no dice there, either. the sensors ability does not need to be 'used' to be effective, its 'always on'

you could have an item with a sensor ability, that also had some other ability that was destroyed on use. I dont know if you can make the sensor ability take supplies, so you could make a huge supply sucking sensor that would generate replacement supplies (so the ship could move again) when it was used (and therefore destroyed). but thats a bit sketchy.