AEB in reverse

Just a quick public service announcement:

Automatic emergency braking does not work in reverse. I don't know if it's meant to or not, but my wife backed (slowly, thankfully) into a bollard at a charging station.

Works in reverse for me. Even when I don't want it to.

Edit: looking at the owner's manual, it says the car will break in reverse if it detects a pedestrian or if it senses motion. Perhaps a bollard isn't sensed as a small pedestrian. I'll have to experiment a bit.

Unmutual said:

Works in reverse for me. Even when I don't want it to.

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I guess I'd rather have it work when I don't want than don't work when I need

codys21 said:

I guess I'd rather have it work when I don't want than don't work when I need

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You'd be surprised at how frustrating it can be when you're trying to back up and the car simply won't let you because it thinks it sees something even if nothing's there.

There are a few thread here on the subject, e.g.: https://lucidowners.com/threads/emergency-braking-in-reverse.6060/#post-180020

Unmutual said:

Works in reverse for me. Even when I don't want it to.

Edit: looking at the owner's manual, it says the car will break in reverse if it detects a pedestrian or if it senses motion. Perhaps a bollard isn't sensed as a small pedestrian. I'll have to experiment a bit.

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I've never heard the term bollard before, had to look up what it was. Mine definitely auto brakes in reverse. Every time I try to back into my garage going more than a few mph, the brakes hard on me with nothing behind it. I guess it wants me to be extra safe.

Unmutual said:

Works in reverse for me. Even when I don't want it to.

Edit: looking at the owner's manual, it says the car will break in reverse if it detects a pedestrian or if it senses motion. Perhaps a bollard isn't sensed as a small pedestrian. I'll have to experiment a bit.

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Argh: "brake"

Unmutual said:

You'd be surprised at how frustrating it can be when you're trying to back up and the car simply won't let you because it thinks it sees something even if nothing's there.

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Amster said:

I've never heard the term bollard before, had to look up what it was. Mine definitely auto brakes in reverse. Every time I try to back into my garage going more than a few mph, the brakes hard on me with nothing behind it. I guess it wants me to be extra safe.

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Very interesting. Would be nice to geofence when it works then, so it can be turned off when backing into a garage or something. Coincidentally, Lucid is picking up my car in a couple days for unrelated work, so maybe I'll have them look into this to see if there was something wrong

Unmutual said:

Works in reverse for me. Even when I don't want it to.

Edit: looking at the owner's manual, it says the car will break in reverse if it detects a pedestrian or if it senses motion. Perhaps a bollard isn't sensed as a small pedestrian. I'll have to experiment a bit.

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Clearly motion isn't the only factor, if a garage wall causes braking. I'd like to think a nice yellow concrete post would be registered by the myriad of cameras and sensors

The thread I referred you to notes that there's no intervention at very slow speeds.

codys21 said:

Just a quick public service announcement:

Automatic emergency braking does not work in reverse. I don't know if it's meant to or not, but my wife backed (slowly, thankfully) into a bollard at a charging station.

Click to expand...

So it appears this may have been the issue: the car was traveling too slow for AEB to engage so the software just decided to let the collision happen

Amster said:

I've never heard the term bollard before, had to look up what it was.

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Oh, then you're missing out on the World Bollard Association. They're funny as heck (when it's not your car), and they don't much like BMWs: https://x.com/WorldBollard

codys21 said:

So it appears this may have been the issue: the car was traveling too slow for AEB to engage so the software just decided to let the collision happen

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Yup. If I back out of my garage at >3mph or so, it slams on the brakes (it thinks there’s a wall; there isn’t, but it’s a steep grade, so I kinda get it).

If I slow way down and creep along, it does not engage AEB. My bet is that’s it.

codys21 said:

Just a quick public service announcement:

Automatic emergency braking does not work in reverse. I don't know if it's meant to or not, but my wife backed (slowly, thankfully) into a bollard at a charging station.

Click to expand...

This is actually not true. It works in reverse, sometimes too aggressively!

Mine has engaged while reversing. I think it picked up distant cross traffic or something and slammed on the brakes. I actually thought I hit something.

Had a tangentially related experience today. I was parallel parked in front of my parents’ Tesla. Got in and shifted into to reverse fairly quickly. Started backing up and there was some latency in the camera images to the point where I almost hit their car. Just before striking I got the stop warning and I’m not sure if it was my braking action or the car’s, but I did stop about an inch or two from their bumper. That was almost a very frustrating situation for me and my parents!

Unmutual said:

Works in reverse for me. Even when I don't want it to.

Edit: looking at the owner's manual, it says the car will break in reverse if it detects a pedestrian or if it senses motion. Perhaps a bollard isn't sensed as a small pedestrian. I'll have to experiment a bit.

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As long as it doesn’t ’break’ in two!