Ioniq 5 brake lights issue.

Not much. When a link opens up a 30-minute YouTube video on a topic as straightforward as a supposed brake lights problem, I tend to skip it. I’m always concerned about two things: not living long enough to see the punch line at the end, and being sorely disappointed that I’ll never get that half hour of my life back. Maybe those are actually the same thing.

First of all, I don't use I-pedal. You get brake lights if you completely come off the accelerator in regen levels 3 or 2. You don't get brake lights if you do the same in regen levels 1 or 0. Just like any car, you get the brake lights if you step on the (service) brake.
My guess is the the regs need to be changed. Auto makers conform to regulations not this guys ideas.

I love Technology Connections, and I like how he went into federal regs in the US and EU. But he did miss about what happens in Auto regen mode (not in the vid), and other ioniq specific channels have covered this already last year. On the user side just don't use I-Pedal, be mindful of auto regen, and if you're trying to decelerate in Level 3 regen, don't feather the accelerator. On the regs side, yes they do need updating to be more specific.

I remember reading a few years back about an aftermarket safety mod that brings up the brake lights as soon as the foot if lifted off the gas pedal. I don't think it caught on.

The issue for cars that brake via regen is that the computer needs to differentiate between a lifting of the foot off the gas that isn't followed by the driver actively applying the brakes, in which case the brake light shouldn't come on (i.e. in order to mimic the current behaviour of ICE cars), and lifting of the foot that would have normally been followed by applying the brakes but the driver doesn't bother because the car is stopping anyway.

In short, at current with ICE car the brake lights aren't activated if the driver slows down by simply lifting the foot off the gas, and this is what EVs are trying to replicate. So the situation described in the video is 'by design'.

In my ICE I coast all the time when coming to a stop particularly in my manual trans car plus I May down shift. This is NO different

This is already covered in other threads and its debunked. In theory it makes sense. In real world testing its not a danger at all.

MUST SEE video, especially for i-Pedal users

Neil F said:

In my ICE I coast all the time when coming to a stop particularly in my manual trans car plus I May down shift. This is NO different

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I also use the engine braking while downshifting in my manual car, this is very different as there is much more braking available in i-pedal without the brake lights coming on. I've just been out to test this and I think its a real safety issue as others will not be expecting such strong braking with no brake lights.

If you still have your foot on the pedal at all in i-pedal mode its not strong, its only strong when you let off. I def disagree. But this exact debate is probably why it was done this way. The manufactures know its this way, they voted to make it this way, cause they are like me and many others and don't see it as a danger. Ever see someone in a manual roll backwards when on a steep hill. They don't turn on reverse lights. All drivers should be able to judge distance with or without lights, lights do not tell you how strong someone is braking, only that they are, you have to judge distance. Race cars doing 200mph most times don't have brake lights at all and they can stop on a dime. Again its not hard braking until your off the pedal. But at this point the safety concern is opinion.

Hold your foot at 20% constant throttle in i-pedal mode. Sorry dude its not strong braking till you let out all the way.

I use i-pedal almost exclusively and have not had any issues. If you take your foot off the accelerator, the brake lights come on. If you feather the throttle, then it does not. No different than an ICE when you take your foot off the accelerator or feather to slow the car down. Actually with i-Pedal, the lights come on when you take your foot off. In the end, it is the responsibility of the person behind you to be watching out. It is called situational awareness and it not something that can be legislated. If someone is on the phone or otherwise distracted and runs into the person in front of them, they cannot blame the lack of brake lights as being the issue.

Hitstirrer said:

What do you guys think about this video detailing an issue with brake lights?

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It is clear that ipedal is dangerous. Before I figured this out I had a couple of not so pleasant, and potentially dangerous, interactions with other drivers. I use only level 2 regen and make sure I come off the accelerator pedal. This should be addressed. Are cars sold in the EU equipped with accelerometer brake lighting?