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by GalaxyRSX
Tue Sep 16, 2025 1:57 pm
Forum: Non-Hondata
Topic: 2003 RSX Base with 2006 K20A3 Engine – ECU Compatibility Question
Replies: 0
Views: 2264

2003 RSX Base with 2006 K20A3 Engine – ECU Compatibility Question

I have a 2003 Acura RSX Base (automatic) with the following setup:

Body VIN: JH4DC54853S003585 (2003)
Engine VIN: JH4DC54856S019824 (2006 K20A3)
Installed ECU: 2003 ECU, part #: 37820-PND-A57

I’m trying to figure out if my current ECU (A57) is fully compatible with my 2006 K20A3 engine, or if I ...