Compared to traditional automakers, the pace of innovation and improvement at Tesla (TSLA) is consistently rapid.
It has only been around 6 years since Tesla launched the Model Y mid-sized electric SUV, but it has been constantly getting new updates and features throughout its lifespan.
To bring a fresh new look and differentiate it from the entry-level Model 3 compact electric sedan, Tesla launched the new Model Y, codenamed Juniper, earlier this year.
However, Tesla didn’t just put cosmetic changes on the table. The new Model Y is also better in terms of engineering and tech innovations compared to its previous generation.
Model Y Juniper New Brake System
In one of the official videos posted on Elon Musk’s social media platform X, Tesla lead engineer Lars Moravy explains the innovations of the new Model Y braking system.
Lars Moravy said that this is a “brand new brake system”. So, what was the need for introducing this new system?
In the previous generation, Model Y and other existing Tesla vehicles, there’s a single brake master cylinder. Therefore, when the vehicle is driven on Autopilot/FSD, the brake pedal is physically pressed whenever the car brakes automatically.
As the human driver wants to intervene (take over driving from Autopilot), the brake pedal is pressed and is in an unexpected lower position. In the new Model Y Juniper, Tesla has removed this engineering flaw.
The brake pedal used to be further away when you wanted to intervene on Autopilot.
— Tesla Oracle (@TeslaOracle_com) March 27, 2025
With engineering improvements in the Tesla Model Y Juniper, the brake pedal is always going to be in the same position. pic.twitter.com/jyHGBzTTXR
Tesla has now integrated two master cylinders for the brake system in the new Model Y. As the car is driven by Autopilot, the brake pedal intended for human use isn’t affected. On Autopilot, the car brakes without pressing the brake pedal.
Since the brake pedal remains in the same position when car is self-driving and self-braking, it’s not lowered when the human driver wants to take over driving from the Autopilot Full Self-Driving (FSD) system.
Tesla Model Y Juniper is the first vehicle to get this newly engineered brake system. Tesla transitions new innovative systems to other vehicles as soon as possible. Tesla Model S and Model X refresh are due this year, and this new brake system is most probably going to make it to those cars as well.
A Tesla engineer explains the new braking system on the Model Y as:
In the new Model Y, we went through a total firmware integration of what happens with the accelerator pedal and the brake pedal.
This means that all our logic in terms of deceleration with the brakes, as well the traction control are now integrated and on top of having a much more consistent brake pedal feel, the brake is shorter, more responsive, gives you always the best possible stability.
Brake system in New Model Y has the freedom to use either electric motor or mechanical brake when you push the brake pedal
— Tesla (@Tesla) March 3, 2025
This brings you maximum efficiency, consistency in pedal behavior & improved stability pic.twitter.com/rIwOUxwpXU
Deceleration Modes
On Autopilot, Tesla cars brake automatically all the time. With the additional master cylinder dedicated for Autopilot use, Tesla has introduced a new Deceleration mode for the new Model Y Juniper, i.e. Reduced mode in addition to the Standard mode (see screenshot below).
The description of the Deceleration Mode setting states the following:
Adjusts how quickly the vehicle slows when the accelerator pedal is released. This setting does not impact range or brake pedal response.
Tesla engineers further give details of the new Deceleration mode, one-pedal driving, and regenerative braking innovations as follows:
One of the things people tend to be not used to when they jump in a Tesla is the one-pedal drive. To make the transition even easier, what we’ve introduced in the new Model Y is the reduced Deceleration mode.
When you lift off the accelerator pedal, the car has the option to decelerate less. However, the regen energy captured stays the same because there is additional regen on the brake pedal.
So, whether you’re releasing and you’ve regen, or you’re fully on the brake, we get the most efficiency out of the vehicle as possible.
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