Are rear stop lights engaging during regen breaking?

AustinV · 06-30-2022, 10:55 AM

Are rear stop lights engaging during regen breaking? I'd consider this important safety aspect.

CaboM4 · 06-30-2022, 11:10 AM

Quote:

Originally Posted by AustinV

Are rear stop lights engaging during regen breaking? I'd consider this important safety aspect.

+1 interested to know full functionality as well. from what i've heard i believe once the minimum deceleration threshold is reached, the lights engage ... so not all times/conditions of regen will cause tails to illuminate

TrainingCaptain · 06-30-2022, 11:20 AM

Yes not all the time. If you decrease speed more than a threshold then only they engage. I first checked this via the 3D model of the car which mimics real time light signals in my vehicle option of idrive. Then also asked a friend to check in a parking lot.

zephyr1108 · 06-30-2022, 12:21 PM

Quote:

Originally Posted by TrainingCaptain

Yes not all the time. If you decrease speed more than a threshold then only they engage. I first checked this via the 3D model of the car which mimics real time light signals in my vehicle option of idrive. Then also asked a friend to check in a parking lot.

Did you test if trying to use regen to come to a stop at a red light? I'm nervous it's not on and someone will not see I'm stopping

sor · 06-30-2022, 12:29 PM

On other EVs I've experienced, the lights come on once you hit a certain threshold of deceleration.

You can think of it as the same as engine braking, in a manual transmission car the lights don't come on with the limited engine braking deceleration.

I'm sure there is a regulation around this, I'm just not sure what the rate of deceleration is or the verbiage.

mcl · 06-30-2022, 06:22 PM

More context in this thread as well: https://bmwi.bimmerpost.com/forums/s...php?p=28949044

cinoh2000 · 07-01-2022, 09:50 AM

If your home screen includes the MY BMW widget in Adaptive Content mode, it shows live state of the brake lights (and turn signals), so you can watch for yourself when regen activates them. Sport Mode adds the HP and torque view.

In full screen (versus widget) you get a front quarter view that you can drag around to see the brake lights, but it swings back to the front after a few seconds.

06-30-2022, 10:55 AM	#1
AustinV Second Lieutenant 113 Rep 236 Posts Drives: BMW X5 40i (2019) Join Date: May 2019 Location: Canada iTrader: (0)	Are rear stop lights engaging during regen breaking? Are rear stop lights engaging during regen breaking? I'd consider this important safety aspect.
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06-30-2022, 11:20 AM	#3
TrainingCaptain Enlisted Member 54 Rep 46 Posts Drives: BMW IX Join Date: May 2022 Location: California iTrader: (0)	Yes not all the time. If you decrease speed more than a threshold then only they engage. I first checked this via the 3D model of the car which mimics real time light signals in my vehicle option of idrive. Then also asked a friend to check in a parking lot.
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06-30-2022, 12:29 PM	#5
sor Brigadier General 3107 Rep 3,072 Posts Drives: 2023 iX M60 Oxide Join Date: Jun 2007 Location: UT iTrader: (0) Garage List 2023 BMW iX M60 [0.00]	On other EVs I've experienced, the lights come on once you hit a certain threshold of deceleration. You can think of it as the same as engine braking, in a manual transmission car the lights don't come on with the limited engine braking deceleration. I'm sure there is a regulation around this, I'm just not sure what the rate of deceleration is or the verbiage.
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06-30-2022, 06:22 PM	#6
mcl Private 117 Rep 86 Posts Drives: 2015 i3, 2022 iX50 Join Date: May 2022 Location: Seattle, WA iTrader: (0)	More context in this thread as well: https://bmwi.bimmerpost.com/forums/s...php?p=28949044 __________________ 2003 325xi (totaled), 2004 M3 (sold, sadly), 2015 i3, 2022 iX50
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07-01-2022, 09:50 AM	#7
cinoh2000 New Member 25 Rep 23 Posts Drives: BMW 335i Convertible 2011 Join Date: Jan 2022 Location: Cincinnati, OH iTrader: (0)	If your home screen includes the MY BMW widget in Adaptive Content mode, it shows live state of the brake lights (and turn signals), so you can watch for yourself when regen activates them. Sport Mode adds the HP and torque view. In full screen (versus widget) you get a front quarter view that you can drag around to see the brake lights, but it swings back to the front after a few seconds. Attached Images
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