Does a 2002 dodge intrepid 2.7 motor fit into 1999 Dodge Intrepid?

While both are Dodge Intrepids and use V6 engines, a direct swap of a 2002 2.7L engine into a 1999 model isn't a guaranteed bolt-in affair. There are likely to be differences in mounting points, wiring harnesses, and potentially even the transmission compatibility.

You'd need to carefully compare the engine bay dimensions and the specifics of the engine mounts, wiring, and transmission between the two years. It's possible with significant modification, but it's not a simple swap. It's far more likely to be a very involved project requiring significant mechanical expertise.