Will a 2003 dodge neon motor fit in 2000 neon?

While both are Dodge Neons, a direct swap isn't guaranteed. The specific engine (2.0L or 2.4L) and transmission in both cars need to be considered. Even with the same engine size, there might be subtle differences in mounting points or wiring harnesses that could cause compatibility issues. You'd likely need to check part numbers to be sure all components are interchangeable. It's best to consult a repair manual or a Dodge specialist to verify before attempting the swap.