San Francisco (Reuters). – In the latest regulatory review of Tesla’s safety, the U.S. safety regulator stated Wednesday that it was reviewing complaints from consumers that Tesla (NASDAQ) vehicles were activating their brakes excessively.

In May, Tesla chief executive Elon Musk said dropping a radar sensor from its partially automated driving system would address the so-called “phantom braking” issue, which some Tesla drivers have long complained about.

The Washington Post reported Wednesday that there were 107 reports from owners of phantom brakes to the National Highway Traffic Safety Administration, up from 34 complaints over the previous 22 months.

A spokesperson for NHTSA stated that the agency was aware of all complaints regarding forward collision avoidance.

NHTSA will take immediate action when data suggest that there may be a danger.

Tesla recalls nearly 12,000 cars over an issue with its Full Self-Driving beta program. This software caused false collision warnings and unnecessary braking.

Tesla stated that false brakes increase “the risk for a rear-end collision with a following vehicle” and that they are not aware of any injuries or crashes related to the condition.

NHTSA also investigated Tesla’s advanced driving assistant system in light of vehicle crashes that involved emergency vehicles. It was also investigating Tesla’s decision to permit games on a vehicle screen when the car is still moving. Tesla eventually removed the gaming function.

Tesla has recently recall 53,822 U.S. cars equipped with Full Self-Driving Beta software. This may have allowed some vehicles to pass stop signs and pose a safety risk.

Tesla wasn’t immediately available to comment.