The auto electrical stuff can be a pain but mostly it is labor rather than expensive parts. The Porsche 944 needs a fair amount of attention focused on taking care of it (electrically). I've found the electrical connectors are pretty low-tech and several of mine need to be upgraded. More on that later. 

In the process of removing the engine, I broke this sensor connector. It was very brittle; these cars are known for high under-hood heat levels and the connectors for these sensors are one of the usual casualties. The other part of this connector as well as the other sensor connectors are also brittle.

One final comment on electrical stuff - Zip ties.  Above are the Porsche original and a substitute that I stumbled onto. My concern was that the substitute, which costs approximately 1/10th that of the Porsche, would not hold onto the studs that are provided around the engine bay. And I set off to find a means of attaching them. I learned though that even though the new ones do not have grippers (to hold them to the studs) that these grippers are not always needed.  A little more creative guy could make these work.