2021 Tesla Model Y · symptom sheet

Full Self-Driving (FSD) does something unsafe

34owner reports
7involved a crash

Newest report Sep 16, 2026 · checked Sep 29, 2026

34 of the 1,077 complaints on this car describe FSD problems.

No recall on this systemas of Sep 29, 2026

7 crashesin 34 reports

1 person hurtin these reports

Tick what matches of 34 reports

FSD tried to turn or change lanes wrongly

it braked hard for nothing while FSD was on

it ran a red light or stop sign or failed to yield

I had to take over to avoid a collision

a software update changed how FSD behaves

it drove over the speed limit and I cannot cap it

FSD problems on other Model Y years

202134 reports 202235 reports 202341 reports 202437 reports 202696 reports

Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2020, 2025.

What this problem usually is

Owners in this group describe Tesla's Full Self-Driving (FSD) doing something they had to override: a wrong turn or lane change, a hard slowdown with nothing ahead, a red light or stop sign it didn't stop for. This page sticks to what owners wrote and what NHTSA has on file.

Read the full explainer · Which cars report it most

What got replaced

Owners who name the part that was replaced mention the software update (13 reports), the cabin or exterior camera (4 reports) and the computer or MCU (4 reports).

Recalls and investigations

No recall on this problem covers the 2021 model year as of Sep 29, 2026.

When it happens

Too few of these reports state a mileage to give a range.

What owners wrote

“I was using my cars FSD program and it nearly turned me in front of an oncoming Semi truck. This was after it hesitated to turn the car when it had a safer opportunity. I thought it would wait but then it started to turn and I had to stop it, which left me slightly out of my lane which was scary too, with a giant truck coming head on.”
Filed Sep 16, 2026

“While my vehicle was operating under FSD, it ran a red light at the above intersection, resulting in an accident.”
Filed May 28, 2026

“For the FSD beta, it does not currently parse and respect road signage such as âNo Turn on Redâ and âDetourâ. This constitutes a material safety risk and also a moving violation.”
Filed May 5, 2023

“I would like to reportÂ a safety issue with the Tesla Model Y 2021 aboutÂ its "phantom braking" behavior in FSD-Beta mode. While driving on I-94 E, I was overtaking a Semi trailer, when suddenly the brakes were deployed and the the speed went from 76 MPH to 63 MPH in the blink of an eye. I was very fortunate that no other car was trailing behind me which would have caused a disastrous accident.Â”
Filed Feb 2, 2023

Should you keep driving it?

This page can't tell you that. 7 of 34 reports involved a crash and 1 people were hurt. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.

File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.

Guide Taking it to a shop? How to describe this problem so it gets found