Crankshaft position sensor

Measure its diameter and compare that to the old sensor. Sometimes aftermarket brands can be off a little on dimensions. Most of the time that does not cause a problem, but if the diameter is too large, you may be able to sand it enough to slide in.

Happy to hear you solved it. The aftermarket industry usually does a pretty good job of reverse-engineering parts to learn how to make them, but sometimes something goes wrong. I could even imagine they tried a different plastic formulation that grew or expanded slightly after the molding process. You can be sure the parts stores will get lots of complaints and returns that will find their way back to the manufacturer. It is also possible there was some corrosion build-up in the hole the sensor goes into. That would make even an original Chrysler part not fit, and is why some sensors are real hard to remove.