16" Nissan rims that came off a second generation Xterra, 16x7 ET40. Bolt pattern is 6x5.5 (or 6x139.7) and is found on both first and second gen Xterras (1999-2004) as well as Nissan Frontiers 99-04.
Here is a link to a site that lists vehicles that use this bolt pattern if you want to check if these will fit-
https://tirewheelguide.com/pcd/6x139.7/
Info from tirewheelguide.com-
Cars with 6x139.7 bolt pattern
6x139.7 bolt pattern or 6x5.5 in inches is used on 302 models. Wheels with this bolt pattern are most often used on Chevrolet, Nissan, Isuzu, Toyota, Foton, Mitsubishi. These numbers mean that the wheel has 6 lug holes, that form circle between the centers of these holes, and this circle diameter is 139.7 mm or 5.5".
We bought these rims for our Xterra thinking that the bolt pattern was the same, we were looking for an extra set of rims for winter tires so we could do the change over ourselves.