Nissan, Subaru immobox SiemensMemory device is Motorola MCU MC68HC05B6 PLCC52 package.
Expected file size is 256 bytes.
Use TMPro chip or T5 transponder.
Written transponder is ready...

Subaru immobox MitsubishiMemory device is serial eeprom 24c01 SMD8 package.
Expected file size is 128 bytes.
Use TMPro chip or K-JMD transponder.
Written transponder is ready...

Mitsubishi, Subaru immobox Mitsubishi ID4DMemory device is Motorola MCU MC68HC805P18 QFP44 package.
For reading of MCU you can use TMPro and MC68HC805P18 adapter.Expected file size is 128 bytes...

Subaru 2013 BCM Mitsubishi.Memory device is serial eeprom 24c02 SMD8 package.
Expected file size is 256 bytes.
Use original Subaru key or Texas Crypto 40/80 bit transponder, for example...