Merged thread: Automatic Emergency Braking activating for no reason

[ReintjeWA]

They'll need to be a lot better if the politicians dream of self driving cars for the masses is to become a reality. At the moment, they'd all come to a grinding halt when one person stands near a kerb.

I'll bet you it's the insurance companies over the politicians, they're just the ones being lobbied. But I get your point.

 

[ReintjeWA]

I had some co-workers being silly in the car park at work, and one triggered the AEB (I felt it was close though, I'd just moved my foot to the brake). They were so in awe the car intervened on it's own, that another had to try it. So I let the car roll towards them without having my foot on the accelerator (just the car in Drive), and sure enough it wouldn't stop... I had to engage the brakes myself before I hit her. The first person then wanted me to try again (perhaps it is indicative of how tough this year is that they'd rather get hit by a car). Anyway, I went a little faster, and had my foot on the accelerator, and then it did work. Although once again I was about to brake myself, as I felt the car left it a little late. She claimed the car knew I liked her more than the other person, but I'm guessing it had to do with the low speed, surprising though, because I would expect this system to be most beneficial in a busy carpark.

Besides from the one false trigger I had months ago, it's behaved well. Although I do dislike pedestrians stepping out close to the front of the car, I always fear the car will deem it too dangerous and slam on the brakes.

 

[NLMGSAN]

Exactly the same thing happened to me & as far as I am concerned the system worked. It can't read minds. I have had the car slow on the motorway in ACC when it has seen something it believes to require slowing/braking. I just put my foot on the accelerator and continue on & all is well.

These systems are on almost all new cars now and are designed to enhance safety and alert the driver. They are not perfect and probably never will be. If you accept that premise, stay alert and ready for the unexpected and react appropriately then job done.

Did ACC remain active? Or was it disabled? Cause if it wasn't disabled it should pick up speed again.

I had some co-workers being silly in the car park at work, and one triggered the AEB (I felt it was close though, I'd just moved my foot to the brake). They were so in awe the car intervened on it's own, that another had to try it. So I let the car roll towards them without having my foot on the accelerator (just the car in Drive), and sure enough it wouldn't stop... I had to engage the brakes myself before I hit her. The first person then wanted me to try again (perhaps it is indicative of how tough this year is that they'd rather get hit by a car). Anyway, I went a little faster, and had my foot on the accelerator, and then it did work. Although once again I was about to brake myself, as I felt the car left it a little late. She claimed the car knew I liked her more than the other person, but I'm guessing it had to do with the low speed, surprising though, because I would expect this system to be most beneficial in a busy carpark.

Besides from the one false trigger I had months ago, it's behaved well. Although I do dislike pedestrians stepping out close to the front of the car, I always fear the car will deem it too dangerous and slam on the brakes.

Odd though. With ACC in a traffic jam the car hits the brakes at very slow speeds. But true, I also sometimes experience a non response with pedestrians or bikers.

Thing is, if I constantly need to check if the car fails to do what it is expected to do, why would I use these systems.....

 

[Corindikev]

Did ACC remain active? Or was it disabled? Cause if it wasn't disabled it should pick up speed again.

ACC was enabled but I didn't wait for it to pick up speed again.

 

[Coulomb]

They'll need to be a lot better if the politicians dream of self driving cars for the masses is to become a reality. At the moment, they'd all come to a grinding halt when one person stands near a kerb.

Tesla's so-called full self driving is on a totally different level. Still not good enough from what I glean from occasional videos, but they seem to be doing way better than the level I thought they'd get to.

There is supposed to be a trial of fully autonomous Model Ys in Austin Texas soon; it will be interesting to see how that goes.

 

[AndyL61]

Tesla's so-called full self driving is on a totally different level. Still not good enough from what I glean from occasional videos, but they seem to be doing way better than the level I thought they'd get to.

There is supposed to be a trial of fully autonomous Model Ys in Austin Texas soon; it will be interesting to see how that goes.

The problem with Tesla ASD is it is camera based. This is not good enough, it needs to have radar etc as well as cameras. I don't think Tesla will ever be good enough with their current hardware.

 

[siteguru]

Ironically the earlier cars did have radar ... they deliberately changed to all cameras in the later versions.

Actually, I think it's LIDAR that's needed for an effective ASD/FSD.

 

[Rolfe]

I've seen some quite heated debate about this from both sides. It will be interesting to see how it develops. I just hope they get it all sorted before I'm too decrepit to drive!

 

[pjmmk]

I've seen some quite heated debate about this from both sides. It will be interesting to see how it develops. I just hope they get it all sorted before I'm too decrepit to drive!

Win the lottery and hire a young man, or woman, to drive you around in your Rolls Royce....

 

[Wizard of Oz]

I had my first instance last week. An idiot was running across road in the opposite lane from me. I thought he was about to stop on the median strip, and was easing off the accelerator and considering the brakes, when the car made my mind up for me.

Pulled up pretty quickly, I have to say.

 

[JohnS29]

I have just experienced my MG4 doing an emergency stop for no valid reason. Very scary and lucky the car behind didn't plough into me. Has MG offered any solutions to this serious malfunction? Thanks.

 

[Joules]

I have just experienced my MG4 doing an emergency stop for no valid reason. Very scary and lucky the car behind didn't plough into me. Has MG offered any solutions to this serious malfunction? Thanks.

Hi John, yes this happened to me with my first MG4 LR. Just about stood on its nose. Nobody in front of us no traffic around us, doing about 10mph approaching a roundabout. The only thing we could think of as it was wet that a drop of rain water had run over the front camera lens, but I don't know for sure. It never happened again fortunately.

 

[JonnyG]

I don’t think it’s an MG4 specific issue. From being on VW forums I’ve seen many similar threads going back to the Mk 7 Golf in 2015. There is usually an explanation (like coming up to a parked car or very rarely something like leaves blowing in front of the sensor).

 

[JohnS29]

Thanks for these responses. It's clearly an issue that gets a lot of feedback - and no simple answers.

 

[OriginalBigAl]

Not MG specific but the simple answers are : put up with it, and live its randomness hoping one day it will work as intended for which you will be thankful, and that future software updates will improve its usability . Or : go old school and turn it off, relying on your own road skills, observation and reactions. I'm not certain how much leeway the Law or Insurance companies give to incidents caused by the car taking charge unexpectedly.

 

[Ferretusmaximus]

Not MG specific but the simple answers are : put up with it, and live its randomness hoping one day it will work as intended for which you will be thankful, and that future software updates will improve its usability . Or : go old school and turn it off, relying on your own road skills, observation and reactions. I'm not certain how much leeway the Law or Insurance companies give to incidents caused by the car taking charge unexpectedly.

Fair enough, but.... There appear to be moves to limit the speed in vehicles to whatever the wonderful electronics decide the current speed limit is. This would only work if the poor driver is prevented from turning these automatic systems off. No doubt bypassing such systems would then invalidate your insurance. Then we can start to consider systems in autonomous vehicles....

 

[Martinonline]

@JohnS29, you can set the sensitivity to medium or low and this is retained in my Trophy. I switched to medium after a couple of right turn emergency stops and never had any problems afterwards.

In another thread I reported that after SC077 I was no longer getting front collision warnings in roads with parked cars where this had occrred before. Switching to high sensitivity made no difference but i am not yet ready to go the Alert + AEB with high sensitivity.

 

[Sparky2]

We have now owned our 2022 MG4 Trophy LR for three months and we can honestly say that it is far and away the most dangerous vehicle we have had the misfortune to drive. The journey home from the dealer in Oldham where we purchased the car was bad enough as we did not know how to disable the wretched lane-assist software which repeatedly tried to steer my wife into the nearside kerb or ditch. The software (and the connected cameras) are an absolute crock of excrement, clearly designed by some clueless geeks who are simply incompetent. The driver has little control over the behaviour of the car which is what makes the car so dangerous on the road. The so-called ‘safety features’ which the dysfunctional software controls have supposedly been incorporated in order to achieve an NCAP 5-star safety rating but as they don’t work properly, they have the opposite effect on the driver’s ability to control the car safely. We cannot believe that cars like this are allowed to be sold in the UK

This evening, the car has given us the fright of our lives. We were driving home at around 9.30pm along a clear, straight, tarmac, suburban road with a 30mph speed limit, a white line down the middle and kerbs on either side. I was maintaining 30mph up a slight incline with another car behind us. There were no parked cars on either side of the road and no oncoming vehicles. All of a sudden, the car slammed its brakes full on and brought the car to an abrupt halt for no reason at all that either of us could see. How the car behind us avoided running into the back of us, I don’t know but he must have thought we were drunk or stupid (we were neither). The ELK was disabled but some of the other ‘safety’ functions were enabled by default. We have regularly had the car brake suddenly for no reason, especially when travelling through contraflow road works with oncoming vehicles waiting at the lights on the opposite side of the road. The stupid software thinks that the car is heading for a head-on collision so brakes hard before the driver has a chance to steer the car through the chicane. This is not a safe feature, it is bonkers and effectively removes any control the driver has over what is a simple manoeuvre. As a 73 year old IAM Advanced Driver and a former saloon car racing driver, I wonder whatever happened to driver skill and responsibility. What if the car behind us crashes into us when the car slams its brakes on? Who is responsible then?

I don’t suppose the car’s software is clever enough to ‘remember’ or record the reason it had for slamming the brakes on tonight with no visible hazard. I recall seeing some message in RED that flashed up on the driver’s screen as the brakes were slammed on and I think the touchscreen briefly showed a picture of the road in front of us but both of these disappeared within seconds of the car being brought to a stop. We probably both sustained chest bruising from the seat belts in addition to the trauma of having the car decide to stop suddenly for no reason. We have now lost all confidence in the car so it will have to be replaced with something that allows the driver to have full control. We also own two classic cars, a 1949 Alvis TA14 and a 1999 Jaguar XKR. The Alvis has no seat belts, airbags or power-steering but it is a lot safer to drive than the MG4

I will be taking the car to my local MG Dealer but as the software is not covered by the manufacturer’s warranty, they will likely charge us £144 to poke around in the car’s computer brain and more than likely tell us that there is nothing wrong with the car

 

[Rolfe]

That's terrible. The LKA has been tamed by the recent software update, but it seems that some cars are prone to stopping for no reason at all. Most cars do not do this and I believe it is a problem with the calibration of the cameras or something like that. Getting a dealer to take this seriously and investigate it could be an uphill struggle though.

I've merged this in with the composite thread with other people's experiences, in the hope that some useful information might be found in earlier posts.

 

[Tuareg]

I haven't had the latest LKA software update and yet my car rarely intervenes with LKA. Maybe once every 2-3 days I get a single warning tone and a very gentle nudge in the steering wheel. I've never turned LKA off as it's basically never 'there'.