You can buy an extended warrantee for almost anything now a days and as mentioned before you don't have to go through Nissan, you can buy them on line, you can shop around people will undercut others. Why? Because there is so much frackin money to be made doing it. They don't make money by paying out to people with expensive repairs easily.
Over your life how many auto repair bills have you had? I mean repairs not wear items, not brakes, ball joints shocks etc... How many cars have you had? Add up all the past repairs, multiply the number of cars you've had by $1700.
I've had a lot of cars, but I also do a lot of driving.
Brand new
mini 60,000km
kia 26,000km
prius 33,000km (still have it)
leaf 16,000km (still have it)
Civic 80,000km
Used
Prius drove 100k to 140,000km (mother in laws now, not counting her km but still no repairs)
Saab drove 180k to 220,000km
Miata drove 100k to 145,000km
GTR drove 85k to 100,000km
TDI drove 120k to 220,000km
Insight 283K to 307,000km
MDX 103K to 110,000km
So since 2004 my wife and I (her since 2009) have driven 491,000km or 307,000miles. Out of pocket non wear item repairs were a ignition coil pack for the saab $200 (kinda a wear part though), Coil pack on the GTR $800, re built the GTR MAF, high engine temps cause the factory solder to melt and short (free for me but new ones would have been $600ish), MAF sensor on the TDI $600, vacuum booster on TDI (can't remember the bill, lets say $500), MDX rear heater resistor $200.
Total $2900
Total warrantee parts
Civic, new plug and battery, cold start issue, within the first year.
Mini, upper shock mounts, but I tracked that car.
The only car that may have benefitted from an extended warrantee was the VW TDI, but just barely. And even if the warrantee had been $1000 if they had a small deductible, or a required service done to keep it up it might not have broken even.
The TDI demonstrates again why warantee's aren't always good. The MAF in that car was $600, the gas car was $150. The dealer told us the TDI MAFs don't go, it's odd that we were in there with that problem, they hardly sell anything. The gas car MAFs were more a few years back but they had issues and started selling a lot, as the demand went up (so aftermarket got in on it) the price of the VW part went down. The TDI MAF had to be bought from VW. If you are worried about an expensive part in your car failing it's price is sometimes in direct relationship to how often it is likely to fail.
The Acura MDX was a 2001, first year and illustrates another reason why paying for an extended warrantee is bad. It had a problem with the transmission, many failures. But Acura stepped up and extended the warrantee (10 years 100k miles I think). They even offered goodwill prices to customers out of warrantee. My car had the original transmission with no repairs. The previous 1 owner always did dealer service and did whatever the service advisor said it needed.
Think Nissan now has a capacity warrantee which I understand they didn't in 2012, how would you feel if you paid $1700 for that back then and then Nissan went and retroactively gave it to everyone (well almost everyone)?
Someone mentioned the charger failing, but if your car is out of warrantee who says you have to put a Nissan charger back in it? If others have added a second charger to the 3.3kWh charger cars would it not be possible to only use an aftermarket charger? If the warrantee forces you to use the original part but will only cover 50% of it and the OEM part is double you're not saving anything.