* Engine Control Module (ECM) and wiring harness: The ECMs are different and aren't interchangeable. The wiring harnesses are also different, requiring extensive rewiring or a custom harness.
* Sensors and actuators: Sensor locations, types, and even the number of sensors may differ.
* Exhaust system: The exhaust manifolds and piping are likely different.
* Transmission compatibility: While the transmissions *might* be compatible, you'd need to verify this and might still encounter issues with the control systems.
* Mounting points: While the engine bay is similar, subtle differences in mounting points could make the swap difficult.
The cost and complexity of making this swap (which would require significant mechanical expertise and potentially custom fabrication) would far outweigh the cost of simply finding a used 2002 engine or having your existing one rebuilt. Focus on sourcing a compatible engine for your 2002 model year.
