* Engine Type: Make absolutely sure the engine displacement and type are the same. A 3.1L V6 from a '98 will likely fit a '99 with the same engine, but a 3.8L V6 or a 4-cylinder might have slight differences in mounting points or accessories. Check the engine codes to be certain.
* Automatic vs. Manual Transmission: The transmission compatibility is crucial. An engine designed for an automatic transmission won't work with a manual transmission and vice versa.
* Wiring Harness and Computer: The engine's wiring harness and computer (PCM) may need to be swapped as well. While the basic architecture might be similar, there could be subtle differences that lead to compatibility problems.
* Minor Variations: Even with the same engine code, there might be minor variations in components between model years that require some adaptation.
In short: While highly likely, it's not guaranteed. Before proceeding with the swap, it's best to verify the exact engine codes from both cars and compare parts diagrams to ensure complete compatibility. A mechanic specializing in these vehicles can provide the best assessment.
