you shouldnt need a flash unless you have the old version and want to change to new for the benefits, which i believe are slighly better mpg? not sure.
what i would do is just pull it, get the same exact part # you see on the current one if it worked well for you and live happily ever after.
I made such a mess with the wrong MAF part, which caused me to run with a CEL for a long time until i figured it out.
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