Tesla is in hot water, once again. This time, the electric car company is being investigated by the National Highway Traffic Safety Administration over potential battery defects that allegedly cause its vehicles to suddenly burst into flames.

In an Oct. 24 letter to Tesla’s Deputy General Counsel Al Prescott, the NHTSA said it is launching an investigation into certain battery-management system software updates in Tesla’s Model S and Model X vehicles (model years 2012 through 2019) and is requesting an extensive variety of supporting information to assist in its investigation. The alleged defects in question, according to the NHTSA’s letter, concern “high-voltage battery fires that are not related to collision or impact damage to the battery pack.”

Jaclyn Jaeger is a freelance contributor to Compliance Week after working for the company for 15 years. She writes on a wide variety of topics, including ethics and compliance, risk management, legal,...