2021 TESLA MODEL 3 Complaints

While traveling at highway speeds, the vehicle arbitrarily applies the brakes when adaptive cruise is being used. It is scary to me and my passengers, and I am afraid to use this feature.

In cruise control or autopilot, the car will apply brakes randomly and without warning. It is extremely scary to have it slam on the brakes for no reason. Luckily no one was behind me, so I wasn’t in danger of causing an accident, but the problem is constant enough I cannot use the cruise control nor autopilot.

The automatic cruise control will 'phantom brake' and is unusable on the 2 lane highways near my home. Sometimes the braking is extremely abrupt and if a car was following it could create a very dangerous situation. The car brakes unexpectedly when traffic is coming the other way or of there's an undulation in the road.

Phantom braking with autopilot on one lane highways when larger vehicles approach the vehicle in the other lane. This is easily repeatable on any one lane road, happens literally all the time. My older Tesla that still had radar never had this problem. This is a problem with Teslas vision only approach to cruise control

While using cruise control on a highway, the car suddenly braked for no reason that I could detect. This has happened 3 or 4 times and I have stopped using cruise control for fear it will reoccur. I reported this to Tesla but was told I would need to take the car to Santa Barbara. I live 90 miles north and traveling to Santa Barbara is not feasible right now. You ask for dates below and I don’t know the dates other than that the incidents occurred between October and December 2021.

The Traffic Aware Cruise Control and Auto-Steer are easily confused so that the vehicle does unexpected things like suddenly slowing down, even heavy breaking, or disengage steering control while in a corner next to semi-truck. This commonly happens when driving at higher speeds, 70 MPH, on the freeway. Suddenly slowing down at such a high speed is dangerous when there are cars following me as they don’t expect a sudden slow down when they can clearly see there is no reason for our car slamming on the brakes. In my observation this problems occur most frequently at higher speeds and when approaching a semi truck or overpass. It is especially worse when going through a corner. Sometimes the center barrier seems to cause sudden slowing down. Also, driving in a corner on the freeway while driving next to a semi truck has caused the auto steer to suddenly disengage which in itself was not dangerous since I had both hands on the steering wheel, it certainly startled me which could potentially be dangerous.

PHANTOM BRAKING When cruise control is engaged (not auto steer or full self driving) the vehicle will intermittently slow down or apply corrective braking when no hazard exists. This happens more frequently on 2 lane roads but also happens occasionally on multi-lane freeways. On a 2 lane road, my vehicle will either slow down, brake or break HARD when anything larger than a SUV is coming from the other direction at normal speeds and in his lane. I have also experienced this when there is nobody for 1+ mile in front of behind me. If there are cars behind me, I find myself covering the accelerator and ready to floor it in case my car suddenly slams on the breaks. This make cruise control very unsafe and stressful. I have another Tesla vehicle doing the same thing and will post separately on that one. Thank you.

The front latch on the front trunk was replaced due to a fault about a month ago. It has since opened on its own completely while parked.

In the process of slowing down for traffic, the brake pedal floored by itself and the brakes locked. There was no longer any contact between the foot and brake pedal. If not for the brake locking, the car would have been able to stop in time and avoid a rear end collision.

Since we received the car in November 2021 on two lane roads when meeting large profile vehicles like semi's or UPS it gives us a collision warning and hard brake, which in heavy traffic scares us of a rear end collision. It happens on both cruise and autopilot. Have been in touch with Tesla and they say everything is working correctly. They say they are trying to correct the problem but It's been four months and we are still scared to use the cruise on two lane roads.