Are all TD42 the same?

[canuck]

As for Japan modification, I can say, that some engines have different oil filters (222&226) and some have two 222 filters. Some have EGR system, and some don't.

I can confirm that with the Y60 Safaris. My 91 has a full-flow and a bypass filter. My wife's 92 has two full-flow filters. The 92 has no EGR but the 91 has the EGR. I confirmed that 92 was factory without the EGR by running the VIN & Model in the Nissan Fast.