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The third revision fuel pump is the "insulated" one.
These have been trickling out to dealers very slowly since the revised TSB in late october.
I know for a fact the parts hit the Manual Allocation list for a while in early November and Toyota were only shipping a handful a day with DSPM/FTS approval, and some dealerships were just installing the old Rev.A part in place of the new pump as it was taking 2-4 weeks to get the new pump in.
There is the possibility that if the dealer told you in November that they installed the newer pump and you got it in less than 2-3 days from the TSB update going live, you might actually have the older part if you have an unscrupulous service dept that plays with part number supersessions. I personally watched the backorder numbers climb every day on Dealer Daily's parts warehouse inventory until they started shipping- mine left the Baltimore warehouse for me on 11/21. I think anyone that was told that they had the new pump installed in the CAT or NY regions in early November might want to double check part numbers.
There is also, obviously, the possibility that the new pump can also make noise, too. Which is why I'm mixing up my fuel as much as I can.
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