This is an ECU that came in with immo problems, although it came out of a 1.6 GV I've only found the part number on a J20 on the EPC. The 82D21 is listed as being for both the G16B and the J20 so Mitsubishi must have implemented some sort of dual mapping on these ECUs:
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1984 Suzuki SJ413K pick up, 1.6 16V Baleno engine 2000 Suzuki Vitara 1.6 8V, many mods 2004 Suzuki Ignis 1.5VVT 4Grip 2006 Suzuki Jimny 1.3VVT JLX+ and many more.