Can a Mazda3 protege engine fit in a Mazda protege5?

Yes, a Mazda3 engine can fit into a Mazda Protege5, as both vehicles share similar platforms and engine configurations. However, modifications to the engine mounts, wiring harness, and possibly the transmission may be necessary to ensure proper installation and functionality. It's essential to consider compatibility with other components like the ECU and exhaust system as well. Overall, while it is feasible, it requires careful planning and possibly custom work.