Hello. I have a new 17 Titan and noticed a shake and rattle coming from my front passenger seat a few days ago with only 450 miles on the vehicle. My initial concern was that there was an issue with the tires/steering/suspension because this developed over some small bumps at 70 mph with cruise on. Having driven some more this only appears to happen when going over bumps... cruise and speed don't seem to have anything to do with it. At quick glance, I don't see anything wrong with any mechanical components or the seat, but am going to look it over more thoroughly when I have better daylight. I have seen that this is a problem with the frontiers, butI am curious if any Titan owners have had this issue or if anyone has any ideas of what to look out for.
I realize I'm posting a few years later, but I had the same problem and think I have solved it.
I have a 2020 NV200. There's a thin metal panel separating the front part of the business van - the driver and passenger area, from the rear part - the cargo area.
When anyone sits in the passenger sit, it makes a squeaky noise when going over any slight bumps in the road. Also, just sitting in the stool and rocking back and forth will also create that annoying noise.
The noise appears to be from that metal partition which is directly behind the stool. The passenger seat and that metal partition seem to be adjacent to each other. There are a few air vents in that metal partition close to the floor of the van. I placed a long thin two foot long 'pencil' into that air vent (in that metal partition) near the floor, and applied leverage to it, forcing that stick to the floor of the van, applying pressure to that metal partition. That solved the noise issue but of course was not a permanent solution.
I forced a piece of rubber-like material between the bottom of that metal partition and the floor of the van. So far that seems to work.
A better solution might have been to remove the passenger seat and place a thin rubber strip between the back of the passenger seat and that metal partition, but I didn't feel like doing that.