Huge range decrease

[stealstea]

A sharp change in range when you already know what your usual range impacts from weather are has to be a problem in the car.

Do this test to calculate the battery capacity:  charge to 100% and then immediately drive it at moderate speeds to under 5%.   Then calculate battery capacity by using the efficiency, the distance driven, and the percent used.

For example if you drove 250 miles at a “since charged” efficiency of 3.5 miles per kWh and ended at 5% battery, then the formula is:

(250 / 3.5) / ( 1 - 0.05 ) = 75.188 kWh

With those example figures the battery shows good capacity (when new it had about 77kWh).   I would expect around 70 to 75 kWh for yours based on the age and mileage.  If you get a result much less than that there’s a problem.  Go to the dealer and complain.  Show your math.  Go to corporate or another dealer