[johnd8n]

I’ve had my IQ5 for a couple of months now and I’ve been experiencing random E braking mainly on the expressways when traveling above 60 mph /100kmh.
Its been violent enough that I’ve had to get off the highway as anyone following too closely would have impacted me from the rear.
i now make a habit of switching off forward collision braking at each startup but unfortunately when using cruise control it reengages automatically.

Anyone experience this or managed to get it sorted?

 

[MIkeS]

I’ve had my IQ5 for a couple of months now and I’ve been experiencing random E braking mainly on the expressways when traveling above 60 mph /100kmh.
Its been violent enough that I’ve had to get off the highway as anyone following too closely would have impacted me from the rear.
i now make a habit of switching off forward collision braking at each startup but unfortunately when using cruise control it reengages automatically.

Anyone experience this or managed to get it sorted?

Not had any experience of that. In fact in the few places where my Kona was prone to it, the Ioniq 5 has been fine.

 

[Chrisso]

Haven't experienced that either.

 

[TimW]

Anyone experience this or managed to get it sorted?

Not myself, but I recall others having problems related to the driver assistance systems, and there was a software update which was related to this. You can enter your VIN here to look for outstanding campaigns - 10d154 is the code for that software fix.

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[PatrickB]

Is it an issue related to the highway driving assistant? I had, just once, the car braking like mad on the highway when I was testing the HDA when navigating. The system takes into account the speed limits on your route.
I was about to leave the highway as the HDA fiercely started braking, apparently because the speed limit on the exit was limited to 70 km/h instead of the usual 120km/h on the highway. It appears this system is kicking in pretty early and rather unexpectedly. Never used the HDA since then (wasn't a big of that neither).

 

[jjd]

Not Ioniq 5, but I have something like this on my Volt Premiere with ACC. When on the highway, if there is a road sign directly over my lane, I can sometimes detect the brakes getting very momentarily applied, as if it mistook the sign for an obstacle. It freaked me out the first time, but now I expect it.

 

[Lin19687]

While I don't have this on my truck, I have the warning buzzer.
If I'm on a tight turning road and cars are parked on the road, it thinks I'm going to crash.
🙄🙄🙄😡😡😡
And for this reason I will NEVER allow my vehicle to record my driving to my insurance agency !

 

[kk2002]

Happened to me a few times on the highway, reacting to a slower moving vehicle in the next lane. I reduced the reaction on the HDA from four to two units, which seems to have stopped it happening. A change of speed limit also causes sudden braking, so I usually set cruise control to a little faster than the actual speed limit (maybe 132 instead of 130 km/h). Seeing as the display always reads at least 3 km/h slower than actual (GPS) speed, that doesn't even count as an infringement.

 

[ctromley]

I recall reading some 5s had to go back to the dealer to get their cameras recalibrated/realigned. Maybe yours is out of whack?

 

[unladenswallow]

Seeing as the display always reads at least 3 km/h slower than actual (GPS) speed, that doesn't even count as an infringement.

EU law stipulates that the speedometer may not under-read (so you can't get a speeding ticket because the speedo was inaccurate). It is allowed to over-read, by up to 8% AFAIR. Since the relationship between actual speed and indicated speed depends on the tyres and their degree of inflation, car manufacturers deliberately set the speedometer to over-read to avoid breaking the law in extreme situations. In my I5 it's by about 5%, and it was about the same in my previous BMW too.

 

[JSeemann]

Happened to me a few times on the highway, reacting to a slower moving vehicle in the next lane. I reduced the reaction on the HDA from four to two units, which seems to have stopped it happening. A change of speed limit also causes sudden braking, so I usually set cruise control to a little faster than the actual speed limit (maybe 132 instead of 130 km/h). Seeing as the display always reads at least 3 km/h slower than actual (GPS) speed, that doesn't even count as an infringement.

And sometimes they forget to remove speed restrictions after end of road work.
Also had the opposite in a local village nearby where speed was suddenly (in car nav) set to 100km/h (max legal speed was 50km/h). Luckely I also always uses +1-3km

 

[kleigh24]

I’ve had my IQ5 for a couple of months now and I’ve been experiencing random E braking mainly on the expressways when traveling above 60 mph /100kmh.
Its been violent enough that I’ve had to get off the highway as anyone following too closely would have impacted me from the rear.
i now make a habit of switching off forward collision braking at each startup but unfortunately when using cruise control it reengages automatically.

Anyone experience this or managed to get it sorted?

Were you able to get this issue fixed or looked at? I’ve experienced it a handful of times which is terrifying while driving on the highway and no one is around or near me. I’ve stopped using the adaptive cruise control all together because I’m too scared it’s going to happen again!

 

[TimI]

Were you able to get this issue fixed or looked at? I’ve experienced it a handful of times which is terrifying while driving on the highway and no one is around or near me. I’ve stopped using the adaptive cruise control all together because I’m too scared it’s going to happen again!

I would contact your dealer. I've never had this happen either.

 

[zamafir]

I've been using it often lately for hundreds of miles in a day and I've never experienced it.

 

[kleigh24]

I would contact your dealer. I've never had this happen either.

Yeah my dealership is aware. Just waiting for next steps now!