Any newer insights on this thermostat?

I believe it's an M62 MAP thermostat with a 90c wax capsule instead of a 105c?

It seems to bring down average temps by all accounts, but store thermostat and low running temp codes/illuminate SES lights sometimes.

What is concerning to me is some say it can cause the DME to switch to a engine warm up map to resolve the perceived problem?

EDIT @Henn28 I see you and JimLev discussing this at an E38 forum? I read through a long thread there but kind of hard to relate with the non-stock cars, the 4.6 is bone-stock.

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04 X5 3.0i auto
03 X5 4.6is