I believe that Nissan have software update to the BMS which improves the situation.My Leaf 30 is 4yrs and 4 months old and has done 31k miles. It has all the battery bars intact but a few days ago I did a round trip of 78 miles on the motorway at 60mph In perfect weather and limped back home with 12% charge! The car‘s been serviced as per the schedule and I can’t understand why this is happening. Even when fully charged, my car says the range is 99 miles. It used to say 120. I’m not sure what to do as I’m now getting nervous about trips that have been easy to do previously! I was told at the last service that the battery was in perfect condition, whatever that means.
Has anyone any experience of this?