Enlarge / Tesla Superchargers. (credit: Getty Images | NurPhoto )

Tesla drivers who say the carmaker "grossly" exaggerated the ranges of its electric vehicles have lost their attempt to sue Tesla as a class. They will have to pursue claims individually in arbitration, a federal judge ruled yesterday.

Two related lawsuits were filed after a Reuters investigation last year found that Tesla consistently exaggerated the driving range of its electric vehicles, leading car owners to think something was broken when the actual driving range was much lower than advertised. Tesla reportedly created a "Diversion Team" to handle these complaints and routinely canceled service appointments because there was no way to improve the actual distance Tesla cars could drive between charges.

Several Tesla drivers sued in US District Court for the Northern District of California, seeking class-action status to represent buyers of Tesla cars.