DDEC Case, service plate, and connector replacement
If someone used an ECM as a wheel chock and now the case looks like this a case replacement is not the answer. However if your DDEC still runs and the laminated circuit board didn’t tear then replacing the case might be a good option.
The aluminum case on a DDEC III or DDEC IV has three functions, first is to keep the inside of the ecm clean and dry, second to support the connectors and third to provide a strong mounting platform to the block. I don’t have a problem with making repairs to ECM with some case damage and proving warranty for that repair as long as the case keeps the water out, has at least 3 mounting ears, supports the oem and engine side connectors on the sides and isn’t cracked. The service plate has to do it’s job as well but as long as the plate doesn’t have a hole or damage along the seal I won’t have a problem with it but if you want it replaced that works too.
If the engine or OEM side connector are missing or have severely corroded pins then the connectors might need to be replaced to restore the full functionality of the ECM.