The makers stand behind the battery typically 8 yr or 100K miles. Our 2016 Nissan Leaf SL battery is covered for 8 years to not drop by more than 64% of new state of health. It was showing 9 of 12 state of health bars with 21K miles when I purchased it last October and 30 days later lost another bar triggering the warranty for a new battery. They had stopped making the 30 kWh battery so they installed the 40 kWh battery pack currently used in production cars which bumped the new range of 107 miles to 150 mile range. The range with the old battery was down to 60 miles per a full charge.
The list price on the 40 kWh battery per Nissan is $12,500.00 and $500 labor so with sales tax that would have been more than than I had just paid for the car. Yes I would not have bought the car without them backing the battery but the Nissan dealership assured me I would be due a new battery pack in short order.
Before the COVID-19 event in the USA 40% of Nissan dealerships were losing money and 10% were breaking even. They were going to start a restructuring plan in May but that was before the Pandemic struck. In Jan 2020 their former CEO predicted they would be in bankruptcy in 2022. Currently they are pulling out of markets around the world but have no plan in plan before their numbers are now dropping so fast. They think their focus will be Japan and USA and perhaps China but Japan is paying companies to move supply sources from China.
Car companies with the 100 year old dealership models are at risk because they to not control the cradle to grave cycle because they sell to the dealerships not to the customers like Tesla does.
I plan to stay with EV's going forward. My main problem with our Leaf is the daughter is always in it like at this moment.