* Same Generation: Both the 1999 Concord and the 2000 Intrepid are from the same platform generation (LH platform). This significantly increases the chances of compatibility.
* Engine Code: The *exact* engine code matters. While both cars used the 2.7L, there might be minor variations within that engine family across model years. You need to verify the engine codes (usually stamped on the engine block) match or are very close. Slight differences in sensors, wiring harnesses, or mounting brackets might cause issues.
* Accessories: The fitment extends beyond just the engine block. You'll need to ensure compatibility of the following:
* Transmission: The transmission must be compatible with the engine. Using a different transmission is unlikely to work.
* Wiring Harness: The wiring harness from the donor Concord should ideally be used, although sometimes minor adaptations can be done.
* Exhaust System: The exhaust system may need modifications.
* Mounting Brackets and Accessories: While the engine block *should* fit, minor differences in accessories like brackets and sensors might require adjustments or replacement.
In short: While it's highly probable, you can't be 100% sure without checking the specific engine codes and carefully comparing the components. It's best to verify compatibility with a mechanic or by consulting detailed engine diagrams and specifications for both the donor and recipient vehicles. Don't assume compatibility based solely on year and engine displacement.
