https://wccftech.com/tesla-stock-under-pressure-as-nhtsa-considers-investigation-over-battery-fires/

The U.S. National Highway Trafic Safety Administration said it has received complaints alleging that Tesla pushed an over-the-air software update to some of its vehicles in response to battery fires.

The vehicles affected the Model S and Model X electric automobiles, and complaints noted that the driving range has decreased for vehicles that received the update. NHTSA complaint file can be found here.