Is a 1995 Jeep Wrangler 2.5 liter motor interchangeable with 1999 motor?

No, a 1995 Jeep Wrangler 2.5L engine is not directly interchangeable with a 1999 Jeep Wrangler engine, even if the 1999 Wrangler also has a 2.5L. While both are 2.5L four-cylinder engines, there were significant changes made to the engine between those model years. These changes likely include differences in:

* Computer systems and sensors: The engine management systems (ECU) are different and incompatible.

* Wiring harnesses: The wiring harnesses are different to accommodate the changes in the engine management system.

* Minor internal components: While the basic block might be similar, internal components like pistons, rods, or even the head might have slight differences.

Trying to swap them would require extensive modifications, and it's generally not considered practical or cost-effective. It's far simpler and cheaper to find a replacement 2.5L engine from a similar year range (1995-1996).