crusty

FiFePO4 batteries do have thermal restrictions. Don't charge below freezing, many (not all!) have low temp cutoff to prevent that. You are correct, there is an upper limit as well. Usually about 141°F. And under the hood will pass that in all but a blizzard. Inside the cabin is pretty much the only place you can put those batteries.

Aftermarket thermostats are known problems. Check with any of the Frontier or Xterra boards. OEM Nissan thermostat only.

Never made the heated seat with folding armrest. Folding armrest was only the base grade. Heated only upper grades. There was no overlap in the middle.

There were a few factory armrest seats. Pretty sure it was the base 1500 model only. Pretty rare. But they were made.

Actually you can get a 3500 in a V6, but in the passenger version only. Cargo is V8 only for 3500, either for 2500, and V6 only for 1500

V6 or V8? Only the V8 has the button. The V8 is a part from the Titan that has a tow mode. The V6 is a part from the Frontier that does not.

Disconnect the battery, wait at least 10 minutes, connect. Amazing how much weird stuff can be fixed with a simple disconnect/reconnect power. There is no "module" for XM. In the past in other vehicles it existed, but not in the vans. It is built into the radio/navi as one.

Tread pattern will change fuel economy, wheel size won't. Tire size will change odometer accuracy which will appear to change fuel economy. A larger overall diameter will probably reduce economy but since the odometer will be under reporting mileage you may see an increase in apparent economy.

The filter is in the pump inside the tank. No external filter. the fuel is also the coolant to keep the pump cool. Running low on fuel can lead to a hot running pump and more pump wear. Long term issues.

Have you looked for a YouTube video and see if there is a step that is done a little different from how you do it? I recall that there are many little things that have to be right. Are all the doors closed fully, what is done after the programming for it to take a set. There may be a little step you are missing, or misinterpreting from the written instructions. I've done that many times. On paper it says to do this, but there are two different ways this can be done and I chose the non-normal way. Don't know it was wrong until I see someone else do it right.

The stock alternator powers a 400 watt inverter. Once you factor in it isn't 100% efficient, that is about a 40A load. I take that as there is at least 40A of capacity. And that is available while running the A/C, with the radio, wipers, lights, and defrost all running as well. I had an old truck that I put EFI on to replace the carbutator. Once I did that I had charging issues at idle at night with the lights on and the A/C running. Was OK while driving, just idle. Pulled the numbers and it was only a 40A alternator. Which 40A at speed was actually enough. It was just at idle it was a little short. That was a 70s low tech alternator. This modern stuff is really good at idle output.

he was last active on this site back in 2016.

Hard to say. Done right, no it shouldn't. Make a mock up of the plug you plan to install. Similar materials, something hard, and about the same size. The lid to a peanut butter jar would probably work fine. Tape it in place, see what happens. The better the mock up, the better the results will be.

Hope things go as planned. Yes, these vans are remarkably comfortable for being a commercial van. I know mine loves to eat up highway miles.

Do you have a link to what exactly you are considering?

Yes, works perfect. Installs like a factory designed filter should.

$15 and it just fits without trying to modify things. https://www.amazon.com/gp/product/B000RDLBG2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

First post, plugging product. Not even going to give them the view count by clicking on the link

Time to call Nissan corporate, not the local dealer. Be nice to them. You have to remember that the dealers are not part of Nissan. The corporate side will know nothing of your history with the dealer. You are dealing with a bad repair. Probably one tiny thing, just don't know what it is. There are field reps that exist just for such issues.

If you are running a TV and Audio equipment you may want a pure sine wave inverter upgrade anyway. The factory invertor is a modified sine wave (the low grade version of the invertor). I am running a 2kw invertor on a house battery. No issues with electronics nor a worry about running down the starting battery.

NV300 is basicly unknown in this forum. We are mostly based in North America and most of the NVs people are here for are the NV1500, 2500, and 3500 body on frame construction not sold outside of North America. The oddity is the Mexico built NV200, which is different than the European version. The issues you are discussing are unknown to us. Because the vehicle is unknown to us.

What vehicle are you working on? Do you have an aftermarket trailer wiring that has been added?

Been dealing with these seats for a decade, never had that issue. Pull the cords, hold, put a shoulder into the seat back.

I might think about it after 10 years or so.

Not a chance. If it worked, it would have been done multiple times by now.