On June 6, 2018 Nissan began conducting a customer service campaign in North America to reprogram the lithium-ion battery controller in 2016 and 2017 model-year LEAF vehicles equipped with a 30 kWh battery, to correct the calculation used for the battery capacity level gauge and distance remaining of the vehicle.
The displayed vehicle range and battery capacity level gauge on these vehicles is displaying range and capacity that is lower than the actual amount. Reprogramming the controller will result in an accurate display of the LEAFs battery capacity and trip range.
In most cases the 30 kWh battery has been just fine, but in other cases the battery controller was providing inaccurate calculated data that falsely indicated that the battery was degrading at an accelerated rate. Some cars were reporting losing as much as 25% of their capacity and range at 15,000 miles. Nissan has been replacing those batteries with new ones while they investigated the issue to find the root cause.
Since everything from the display of range and SOC is based on these faulty calculations, everything indicated that the battery was going bad fast. Nissan indicated that they knew something was wrong, that these batteries should not be going south as fast as they indicated, and analysis showed that indeed that in some situations the BMC was providing incorrect data.
Every owner of a 2016 or 2017 LEAF should contact their local dealer to get this fix applied to their vehicles, even if they have had their battery already replaced.
2018 LEAF SL
Delivery April 10 2018
2014 LEAF SV
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!