Adaptive Cruise Control Software Problems of Tesla Model 3

The contact owns a 2021 Tesla Model 3. The contact stated while driving 70 mph with the cruise control activated, the vehicle applied the brakes independently. The contact stated no warning light was illuminated. The contact stated he experience the failure three times while using the cruise control feature that same day. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 7,000.

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The contact owns a 2022 Tesla Model 3. The contact stated while driving approximately 55 mph and using the automatic cruise control, the vehicle inadvertently slowed down with a larger vehicle approaching from the opposite lane. The contact stated no warning light was illuminated however, a warning alarm bell chimed and the vehicle decelerated to 20 mph. The contact reported that after the larger vehicle went by, the vehicle resumed the pre-set cruising speed. The vehicle was not taken to the local dealer; however, several scheduled appointments with the techs at the dealer had been cancelled. The vehicle was not repaired. The manufacturer had been informed of the failure and the contact was informed that the failure was a software issue known as phantom braking. The contact stated that the manufacturer recommended continued use of the cruise control in order to gather more data on the cause of the failure. The contact was concerned about the risk of a crash while using the feature. The failure mileage was approximately 200.