1. Original ECM p/n 4727425AD
Last letter does not matter, newer revision will be a higher letter2. If I buy a used one, will it have to be reprogrammed as I have an encoded key? or will it work right away? Yes, VIN, mileage, need to be programmed. Also, the software shoudbe updated.3. Does the used one have to be an exact match in p/n?
4. If I buy a remanufactured one, can I bring it to the dealer to program uninstalled? or it must be installed in the vehicle?
If properly programmed, it should be plug and play
"ECUs are the king of ignition parts remanufacturing. When ECUs were first introduced, failure rates were high. Although original equipment manufacturers quickly improved reliability, remanufacturers found the market very attractive. Some companies developed the capability to remanufacture ECUs. The process is different from regular remanufacturing, as replacement of electronics components does not require development of mechanical tooling capabilities.
There are three methods to remanufacture the ECU. The first one is replacing visually damaged boards. The second is replacing damaged integrated circuits determined by electronic testing. The third option provides programming upgrades to the ECU on top of integrated circuit replacement. Final reliability of remanufactured ECUs depends on the method used."
"FLASH REPROGAMING... WHAT CAN IT DO FOR ME?
WANT BETTER GAS MILEGE, IMPROVED EMISSIONS, FEWER BREAKDOWNS AND IMPROVED PERFORMANCE?
THINK FLASH FIRST!
ANYONE WHO USES A PC KNOWS THAT YOU MUST FIRST PERFORM PERIODIC UPDATES TO ENSURE IDEAL PERFORMANCE. THE SAME HOLDS TRUE FOR THE ENGINE CONTROL MODULE IN YOU VEHICLE. CALIBRATION UPDATES, SUPPLIED BY THE VEHICLE MANUFACTURES AND INSTALLED BY US WITH THE EQUIPMENT WE HAVE, OFTEN CORRECTS ISSUES SUCH AS DRIVEABILTIY PROBLEMS, COMPENSATION FOR NORMAL WEAR AND TEAR, KNOWN POTENTIAL FOR PRE-MATURE FAILURE, ENHANCED DIAGNOSTICS, AND MUCH MUSH MORE. EVENTUALLY EVERY AREA OF YOU VEHICLE WILL BE CONTOLLED BY THE ENGINE CONTROL MODULE"