There is a cross reference to Bosch, NGK, etc. but AFAIK the Denso is the OEM for the Subaru sensor.
From everything I just read, it is Plug & play.
ACDelco - 213-2843
Airtex - 5S4302
Bosch - 15537
Denso - 234-9011
NGK - 24659
Subaru - 22641AA042
Walker - 250-54004
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