Postby deermjd » Tue Sep 11, 2012 10:53 am
That sounds about right for labor. Probably a 2-hour job. I was quoted about $450 (parts + labor) to replace mine a couple years back. I opted to purchase the parts myself (~$120) and replace it myself. I didn't have many miles on the truck at that time so I just replaced the sending unit and put the original fuel pump back in. But with your mileage I would strongly suggest to have the fuel pump replaced as well while the tank is out.
Also, keep your receipt in case your VIN is recalled later. My VIN was not covered at first but the recall was extended and I was reimbursed. Now that I think about it, the fuel gauge sending unit may have just had the warranty period extended so with 155k miles you would be well beyond it now. I'll check my receipts when I get home if nobody else chimes in by then.
For awhile, Nissan only sold the entire relay assembly (IPDM) but now the ECM relay can be purchased individually for about $3. So if they don't replace it under recall or try to over charge you, just buy the relay and replace it yourself.