Tesla is preparing to roll out FSD Supervised v14.3.9, and one of its biggest changes is a new active safety feature called Tesla Automatic Collision Evasion.
The feature is designed for a specific type of emergency: what happens when braking alone may no longer be enough to avoid a crash?
Imagine you are driving manually when the vehicle ahead suddenly stops. Automatic Emergency Braking, or AEB, can immediately apply the brakes. But if the remaining distance is too short, even maximum braking may not prevent a collision.
That is where Automatic Collision Evasion goes a step further.
Instead of relying only on the brakes, FSD may use steering, braking, and acceleration to change the vehicle’s path and attempt to avoid the danger.
Most importantly, this can happen even when FSD is not actively engaged.
In certain emergencies, FSD v14.3.9 may temporarily intervene while the driver is controlling the vehicle manually.
The key difference is simple: AEB primarily tries to slow the car down, while Automatic Collision Evasion can also try to steer around the danger.
How the Emergency Maneuver Works
A simple example makes the feature easier to understand.
Imagine you are traveling on a divided road when an obstacle suddenly appears ahead. The vehicle determines that even immediate braking may not stop the car in time.
If the system identifies a viable escape path, it may do more than apply the brakes.
It could brake while steering into an adjacent lane or onto the shoulder, depending on the road and surrounding traffic.
According to the currently available information, Automatic Collision Evasion may perform this type of emergency maneuver under certain conditions, including on a divided road with a speed limit below 85 mph.
That does not mean the car will automatically make an aggressive steering move whenever it detects danger.
The decision to intervene depends on several factors, including:
Road conditions
Nearby traffic
Collision risk
Whether a safe escape path appears to be available
The basic logic is:
Braking may not be enough → FSD looks for a viable escape path → steering, braking, and acceleration may be used to avoid the collision.
Automatic Collision Evasion vs. AEB: What’s the Difference?
Traditional Automatic Emergency Braking focuses primarily on one thing: slowing the vehicle down.
When the system detects a potential collision, AEB can automatically apply the brakes to help avoid the crash or reduce its severity.
Automatic Collision Evasion addresses a different problem.
What if the car cannot stop in time?
In that situation, the system may attempt to change the vehicle’s path instead of relying entirely on braking.
Safety Feature |
Main Action |
Intended Situation |
|---|---|---|
Automatic Emergency Braking (AEB) |
Automatic braking |
When slowing or stopping may help avoid or reduce a collision |
Automatic Collision Evasion |
Steering, braking, and acceleration |
When braking alone may not be enough to avoid an imminent collision |
The biggest difference is therefore straightforward.
AEB mainly reduces speed. Automatic Collision Evasion may also change where the vehicle is going.
FSD May Intervene Even During Manual Driving
This is one of the most notable changes coming with FSD v14.3.9.
FSD is normally thought of as a driving system that the driver deliberately activates. With v14.3.9, some FSD capabilities may remain available in the background and activate during specific emergencies.
Tesla’s AI team says FSD Supervised can activate on the driver’s behalf when the system detects an imminent collision and determines that AEB may not be sufficient.
Tesla has also said the system may intervene if it detects that the driver is heavily distracted or believes that FSD was accidentally disengaged.
That means the feature is not limited to one specific type of obstacle.
Potential intervention scenarios may include:
An imminent collision where braking alone may not prevent impact
A driver who appears to be severely distracted
A situation where FSD may have been unintentionally disengaged
This changes the role FSD can play during manual driving.
Instead of functioning only as a driving mode selected by the driver, it may also act as an emergency safety layer waiting in the background.
Driver Control During an Emergency Maneuver
Automatic intervention does not necessarily mean the driver loses all ability to take control.
Tesla says driver inputs are handled differently while Automatic Collision Evasion is active. During an emergency maneuver:
Pressing the accelerator pedal will have no effect
Pressing the brake pedal can increase deceleration, but will not automatically cancel the evasive maneuver
Regaining directional control requires a clear and forceful opposing steering input
Once the steering override reaches the required threshold, control can return to the driver.
This approach is intended to prevent small or accidental inputs from interrupting an emergency maneuver that the vehicle has already started.
It also raises an important practical question.
What happens when the driver and the vehicle react to the same emergency at the same time?
That interaction may become easier to evaluate once FSD v14.3.9 reaches more vehicles and the system is used in real-world conditions.
Why This Is More Than “Better Emergency Braking”
It would be easy to describe Automatic Collision Evasion as a more advanced version of AEB, but that misses the main change.
The system is not simply trying to brake faster or harder.
It may make a broader driving decision.
If the vehicle concludes that stopping is no longer enough, FSD may attempt to determine whether changing lanes, moving toward the shoulder, or following another available escape path could avoid the collision.
That means the system may combine multiple vehicle controls at once:
Steering
Braking
Acceleration
The goal is not simply to reduce impact speed. It is to potentially avoid the impact altogether by changing the vehicle’s trajectory.
When Will Tesla FSD v14.3.9 Roll Out?
FSD Supervised v14.3.9 has not yet received a broad rollout. Tesla says the update will begin rolling out soon. Employees are already testing the release, with early testers expected to receive it afterward.
The update is associated with software version 2027.5. The previous North American version was FSD v14.3.8.
Automatic Collision Evasion is expected to be the most significant new feature in v14.3.9.
Tesla’s upcoming pothole avoidance capability has also attracted attention. However, current information does not confirm that pothole avoidance will be included in the v14.3.9 update.
For now, the biggest change in v14.3.9 is clear: FSD may no longer need to be actively engaged before it can help in an emergency.
If the system determines that braking alone cannot prevent an imminent collision, Tesla may allow FSD to temporarily step in and use steering, braking, and acceleration to try to find a safer path.
Frequently Asked Questions
Q1：What Can Tesla Do During a Collision-Evasion Maneuver?
The most significant capability is steering.
Traditional emergency braking systems are primarily concerned with slowing the vehicle. Automatic Collision Evasion allows Tesla to make a broader driving decision by considering whether there is somewhere safer for the car to go.
For example, if a collision ahead becomes unavoidable through braking alone and the system determines that an adjacent path is viable, it may:
Begin braking.
Steer away from the obstacle.
Adjust acceleration or deceleration as required.
Follow the available escape path.
The original information for the feature describes FSD controlling steering, braking and acceleration during this type of maneuver.
Q2：Can a Tesla Steer Into Another Lane to Avoid a Crash?
Under the appropriate conditions, that is one of the possible actions described for Automatic Collision Evasion.
A vehicle could potentially move into an adjacent lane or toward the shoulder if Tesla determines that:
Braking alone will not avoid the frontal collision
An alternative path exists
The surrounding environment makes the maneuver viable
The feature's other operating conditions are satisfied
Current descriptions also indicate that this emergency steering behavior has tighter restrictions than ordinary FSD driving. For example, reports based on Tesla's detailed feature information cite restrictions involving road type, speed, road surface and vulnerable road users. TeslaNorth.com
Automatic Collision Evasion should therefore not be interpreted as a general-purpose "swerve around anything" system.
Q3：Can the Driver Override Automatic Collision Evasion?
Yes.
Automatic Collision Evasion does not permanently remove control from the driver.
Detailed descriptions of the feature indicate that a driver can override the steering intervention with a firm, deliberate steering input, although the force required can be greater than what is normally needed to cancel FSD.
The system is designed to resist minor accidental inputs while carrying out an emergency maneuver, not prevent an intentional driver takeover.
Because this behavior directly affects control of the vehicle, Tesla advises owners to consult the applicable Owner's Manual for the exact implementation on their vehicle. The public v14.3.9 release notes also explicitly direct users to the manual for additional Automatic Collision Evasion details.
Q4：Which Teslas Get Automatic Collision Evasion?
Current rollout information indicates that Automatic Collision Evasion is an HW4/AI4 feature with FSD v14.3.9.
The 2026.27.6 release is unusual because Tesla is deploying different FSD branches under the same underlying software version:
HW4 / AI4: FSD Supervised v14.3.9
HW3 / AI3: FSD Supervised v14.2 Lite
Automatic Collision Evasion is listed with the HW4 version rather than the HW3 Lite branch.
Current fleet reports show 2026.27.6 appearing on Model 3, Model Y, Cybertruck and newer Model S/X configurations, although exact availability can vary by vehicle hardware and rollout wave.
Tesla could change compatibility in a future release, so HW3 owners should not assume today's hardware limitation necessarily describes every future version.