Battery ECU slight corrosion, salvageable?

Hey all,

So I recently needed to swap batteries, got a new assembly from Toyota and was checking everything over, noticed old battery ecu had one terminal with discoloration. No visible corrosion really but it isn’t gold like the rest of the pins. I checked inside the ecu and all the pins looked perfect still. Wanted to post the picture and ask for opinions on if it’s worth swapping out for an ecu with no corrosion/discoloration whatsoever.

Pin in question is 4th pin in from the right.

Thanks!