This! A lot of times you can delete the parameters with tuning too so you won’t get a CEL after deleting it. I know once I get the itch to start modding my car first 3 things will be Accessport, EGR delete and, BPV. No real power gains but with the direct injection and Mazda tuning the MS3 pig rich, the EGR leads to carbon buildup faster than most engines. The accessport let’s you disable the EGR parameter.