I am in the process of replacing both my speed and reference sensor for an 87 Carrera and based on the condition, I believe the CHT sensor may be original. I have not had any driving issues (other than the no start issue I am trying to resolve). Car has 111k miles and since I have the grommet out where the sensor wires pass into the engine bay, I wonder if I should change the CHT out as well.
Also, the plastic connector side of the CHT in the engine bay has broken. I assume this is part of a larger wiring harness and not easily replaceable.