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Brake Light / Regen question

I don't know if this is worthy of an entirely new forum topic, but can anyone tell me whether the brake lights come on when you are regen braking in the Model S? Driving in to work this morning in the rain with low visibility it occurred to me that it might be good for the guy behind you to know you're slowing down, even if you haven't necessarily stepped on the brake pedal...

From what I've read, your brake lights will come on if the regenerative engine braking slows your car down beyond a certain rate, so yes.

Yes, this was brought up on many test drives and was confirmed based on g-force if I remember correctly.

More info or a thread on this here:

Telsa uses an accelerometer to determine when to apply the brake lights.

I'm seeing Tesla sedans on the road in Menlo Park and followed one on my way home yesterday. I noticed that the brake lights came on often and I thought needlessly. It looked as if the driver was two foot driving and feathering the brake pedal. Then it occurred to me that the regenerative braking could be culprit.

Having regenerative braking turn the brake lights on is strange (to me). Drivers used to downshifting will find this counter intuitive and annoying when you're following.

Can the accelerometer's sensitivity vis-a-vis braking be software controlled or turned off?

I would also like to see a more aggressive regenerative brake, something closer to lifting off the gas with a manual transmission.

Yeah you'll look like you are brake pedal happy for sure in this car, but at least when the car behind you brakes in reaponse you can gun it to get away quicker.

What I will love is the impatient person behind me assuming I'm a slow ride the brake driver until they mistakenly try to pass me! ;)

I noticed in a recent video (might have been Car and Driver review) that the brake light looked yellow or amber. Did anyone else notice that on the video and if this is the case, does anyone know whether this is the regen braking color? Or maybe this was an optical illusion due to lighting during the video? I don't think yellow would be an approved actual braking color (from an NHTSA standpoint).

They are red, it's a video artifact.

I noticed the same. It's here, and yes, it seems to be just blown-out red:

And here:

And here's the blinker, which presumably is the same light:

Finally, here it becomes clear that the brake lights are actually bright red and not yellow:

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