Sirius in 02 x5, cd player hw/sw rev question

[jrcmlc]

I bought an "updated" cd player from a salvage yard to complete my sirius install. My cd player says "sv50-0142" when you check the rev as detailed in one of the faqs. I understand it needs to say svxxxx50 or higher. THe new drive I bought says it was made in 00 on the bottom , the part # doesn't match, (they sent me the wrong one from what I ordered) but....it says this on the bottom:

cd53 e39/53

65.12-6 908 783

SW/NO. 50
HW/NO. 48

KW: 47/00

Manufactured 00 november 1w.

So, it appears that it has the right sw revision even though it's sig. older...is this possible? They salvage yard is looking for the part they really sold me but if this would work I'd just keep it and use it instead.

UPDATE: I installed this unit to check the sv # when you power it on, it is SV-4700 50. SO, again from looking at it from this angle it seems as though it has the correct firmware. Is that possible? The part # is older than the one in my car now...so, there must have been a stop in FW revisions at some point and then they restarted? For point of reference my old unit said "sv50-0142 when I checked it.

Thanks for any help.

Joe Clark