This is a Nissan SENTRA Fuel pump module.  We bought it for an 02 Sentra 1.8L and realized we didn't need it because we tried a new ECM first and that cured it. . Salvage year man said there is more than one pump depending on serial number or origin so he actually had this removed from a running 2006 I think......................................
Look close at the pictures. I took a bunch of them because it is not the typical Sentra pump. Most of them have a single line. This one hasTWO LINES, and a 5 pin plug. We got it for a 1.8L Sentra 02 I think but it is suppose to fit a 2.5L also. It doesn't have the #174 sticker it had on it before I cleaned it, but I'm fairly sure that's what it had on it, and that's what it had on it according to the salvage yard guy.
Look closley at the pictures. It doesn't look like any of the fuel pumps you will see online or in most Sentras. I'm told it's more typical on California cars but cannot verify that.

Look Close and make sure it's yours. no returns.

Salvage yard guy says it fits 2000, 01, 02, 03, 04, 05, 06 sentra 1.8L or 2. 5L but not very many of them.

 
   I do not want to ship it back and forth because you aren't sure before you buy.  Try everything else first to be sure you need a pump and check out the pics to be sure it's the same one 5 pin plug  and also 2 nipples pointing the same way. Ships Priority Flat rate mail Same day if early enough. $11.35