We got a Mitsubishi Montero for which one key was lost, It was a 2008 model car having inbuilt remote key. Although we were able to clone the key. It had an ID 46 chip but not able to program any remote. We managed to click few pics of its remote circuit.

Remote Manufacturer
OMRON Corporation, JAPAN
433.9 Mhz
Battery Used
CR 1616
Battery Voltage
3 Volt