[SteelHeadz]

Make sure you take note of the PCM part number you currently have and try to match the numbers. The last 2 letter designations of the part number will indicate the software version. For example if the PCM part number is 521XXXXAA and the one you find on the junkyard is a 521XXXXAB, the AB is the newer software. Another thing to look for when your swapping PCM and hunting down the correct part number is if the front clip or anywhere close to the PCM has a gray and white decal from Chrysler with a handwritten TSB# or a recall # , take note of the new PCM software Part number ..