Merged thread: Automatic Emergency Braking activating for no reason

[Rolfe]

I did get a phantom braking episode the other day, but it wasn't an emergency stop, so it was more of an annoyance than anything. That's once in 6,500 miles. I don't mind that. But if it was doing actual emergency stops, that woud be a different matter.

 

[JonnyG]

I've had emergency braking (to a stop) come on a few times but all for good reasons.

1. Late braking approaching a queue of traffic where the car must have thought it would be more cautious than me ?.

2. Turning right into a side road when I leave a bit of a gap in front so I can start to creep forward while an opposing car passes. I start to creep forward in anticipation of the gap and start to turn the steering wheel slightly. The car must think I'm about to floor it rather than keep creeping and so puts on the anchors again very abruptly ?

I can't complain really as all of these occasions had a reason, and had I not been fully aware of what I was doing they would have saved me in all instances.

Thankfully no "phantom braking" for no good reason to report yet in 2750 miles of driving.

 

[mauns]

So I've read about this but it's never happened to me/my car until Monday this week.

I'd just got off the motorway. I had my daughters in the car with me and went to pick up my son after school. As I left the car park (speed around 20-30 mph). Without warning the emergency brake came on. We were jolted. My daughter thought I'd hit something. There was nothing in front of me and luckily, no one behind me. It was really scary and the fact I'd only just got off the motorway was a terrifying thought if it had happened then.

I've booked it into the MG garage but first date is 15 April! I now have to manually turn off AEB before every drive.

I was wondering how many of you have experienced this and if it was taken to the garage has it happened since?

 

[Ejaydee]

I have had the AEB come on once, but in the car's defence, there was a double decker bus on my side of the road which was overtaking some parked traffic. However, the emergency braking caught me by surprise, as I was still rolling forward at 15 to 20 mph and was brought to an abrupt standstill.

I guess the car's systems thought the bus was going to plough into us, although it was obvious to me (as a human ?) what the bus was doing and was no threat.

As you say, the emergency braking process is rather scary, and bus driver looked at me rather quizzically as he pulled back into his lane and passed me, because he probably thought I had slammed on the brakes. What really caught me out was the distance away that the bus was when the AEB activated, it must have been between 50 and 75 metres away!

Thankfully, the car has behaved itself ever since, and recently it had some sort of software update at the Dealer's, which has made it a joy to drive, and even the LKA is behaving itself, which before the update, it definitely wasn't.

 

[MG4NI]

I have had the AEB come on once, but in the car's defence, there was a double decker bus on my side of the road which was overtaking some parked traffic. However, the emergency braking caught me by surprise, as I was still rolling forward at 15 to 20 mph and was brought to an abrupt standstill.

I guess the car's systems thought the bus was going to plough into us, although it was obvious to me (as a human ?) what the bus was doing and was no threat.

As you say, the emergency braking process is rather scary, and bus driver looked at me rather quizzically as he pulled back into his lane and passed me, because he probably thought I had slammed on the brakes. What really caught me out was the distance away that the bus was when the AEB activated, it must have been between 50 and 75 metres away!

Thankfully, the car has behaved itself ever since, and recently it had some sort of software update at the Dealer's, which has made it a joy to drive, and even the LKA is behaving itself, which before the update, it definitely wasn't.

Hi Ejaydee. Thankfully I've never had this experience after 6000 miles driving. I've booked my car in for it's first service next month. Do you, or anyone else out there know what update helped with LKA?

 

[Ejaydee]

Do you, or anyone else out there know what update helped with LKA?

No, sorry I do not know what the software update was, but as the version numbers shown on the infotainment did not change, the update must have been for one of the buried components. The car went in to have the front passenger door window winding gear sorted, because the motor had locked itself (thankfully closed) and when I took it in I was told that MG had an outstanding update to do. I have no info what it was, but the car is now even more pleasurable to drive ?.

 

[fshuk1]

I have had the AEB come on once, but in the car's defence, there was a double decker bus on my side of the road which was overtaking some parked traffic. However, the emergency braking caught me by surprise, as I was still rolling forward at 15 to 20 mph and was brought to an abrupt standstill.

I guess the car's systems thought the bus was going to plough into us, although it was obvious to me (as a human ?) what the bus was doing and was no threat.

As you say, the emergency braking process is rather scary, and bus driver looked at me rather quizzically as he pulled back into his lane and passed me, because he probably thought I had slammed on the brakes. What really caught me out was the distance away that the bus was when the AEB activated, it must have been between 50 and 75 metres away!

Thankfully, the car has behaved itself ever since, and recently it had some sort of software update at the Dealer's, which has made it a joy to drive, and even the LKA is behaving itself, which before the update, it definitely wasn't.

The car is sensitive to just rolling, it can only think if something is pressed. Cover the brake and it will be happy.

Also use you indicator when you are doing, shall we say a quick maneuver. All cars are like this. They can only think using the car's signals. So give the car the signal.

 

[Rolfe]

I merged this with earlier threads on the same topic, to keep all the advice and information together.

 

[Greatscott2000]

Hi guys,
Just registered with this forum. Our company has an MG ZS 2022 model which is used by various employees for supply runs. Yesterday, our mechanic was on a trip when the EV's brakes locked up taking the car from 60 to 0kph in a second (emergency braking?) He reported no apparent reason for the auto-braking and sustained soft-tissue injuries to his legs from the incident (he is a tall-bloke).
Contacting the MG service dept with our concerns drew no interest from them. Vehicle had been serviced 2-weeks prior.
Is there a known sudden braking issues with the ZS model as per the above? Car has been tagged out-of-service until resolved.

 

[Ian Key]

Hi guys,
Just registered with this forum. Our company has an MG ZS 2022 model which is used by various employees for supply runs. Yesterday, our mechanic was on a trip when the EV's brakes locked up taking the car from 60 to 0kph in a second (emergency braking?) He reported no apparent reason for the auto-braking and sustained soft-tissue injuries to his legs from the incident (he is a tall-bloke).
Contacting the MG service dept with our concerns drew no interest from them. Vehicle had been serviced 2-weeks prior.
Is there a known sudden braking issues with the ZS model as per the above? Car has been tagged out-of-service until resolved.

You might be better asking on the MG ZS forum.

MG ZS EV Forum

Discussions and information about the original MG ZS EV and the refreshed SE, SE Long Range, Trophy and Trophy Long Range SUV electric cars from MG

www.mgevs.com

 

[spoton]

So I've read about this but it's never happened to me/my car until Monday this week.

I'd just got off the motorway. I had my daughters in the car with me and went to pick up my son after school. As I left the car park (speed around 20-30 mph). Without warning the emergency brake came on. We were jolted. My daughter thought I'd hit something. There was nothing in front of me and luckily, no one behind me. It was really scary and the fact I'd only just got off the motorway was a terrifying thought if it had happened then.

I've booked it into the MG garage but first date is 15 April! I now have to manually turn off AEB before every drive.

I was wondering how many of you have experienced this and if it was taken to the garage has it happened since?

Please read back to my comments at #135 and#138

 

[fshuk1]

Hi guys,
Just registered with this forum. Our company has an MG ZS 2022 model which is used by various employees for supply runs. Yesterday, our mechanic was on a trip when the EV's brakes locked up taking the car from 60 to 0kph in a second (emergency braking?) He reported no apparent reason for the auto-braking and sustained soft-tissue injuries to his legs from the incident (he is a tall-bloke).
Contacting the MG service dept with our concerns drew no interest from them. Vehicle had been serviced 2-weeks prior.
Is there a known sudden braking issues with the ZS model as per the above? Car has been tagged out-of-service until resolved.

First time I have read IN OUR FORUM that a car was travelling fast when this happened. It normally happens at low speeds so it is frightening but not life threatening. This now worries me. Have we had other instances of this with MG cars?

 

[Coulomb]

First time I have read IN OUR FORUM that a car was travelling fast when this happened.

The report is from Australia, so it was 60 km/h (about 37 mph), not 60 mph. 60 mph to zero in a second is almost impossible.

 

[Tuareg]

I would think 60kmh to 0kmh in 1 second would also be impossible.

 

[WonkoTheSaneUK]

I would think 60kmh to 0kmh in 1 second would also be impossible.

Not if there's a brick wall or tree involved.

 

[Deleted member 10410]

Yep about 30 mph the other day. Didn’t bring to total stop but enough to throw everything off seats etc. I was going over a slightly narrow bridge with queued traffic the opposite side

First time in a while mind

 

[fshuk1]

Yep about 30 mph the other day. Didn’t bring to total stop but enough to throw everything off seats etc. I was going over a slightly narrow bridge with queued traffic the opposite side

First time in a while mind

If you think about it the car sees you travelling at 30mph towards oncoming traffic.

Not sure what we can do at this situation. I would suggest put your indicator on. Anything to let the car software know you-know what is happening.

 

[Thebiglad]

This is unfortunately quite common on modern cars (not just MGs). You can turn the system off but I think you have to do it every journey. The technology is just not 100% there yet in terms of detecting a real threat. However, mine, buggy though it is, has saved my bacon a couple of times so I leave it on.

Initially I tried driving with lane keep assist on, and got a number of 'Phantom Braking' episodes which were unnerving to say the least. I put it down to the camera 'seeing' hedges/fences on sharp bends. As soon as I found a way of completely deleting this system I have no further problems.

 

[fshuk1]

Initially I tried driving with lane keep assist on, and got a number of 'Phantom Braking' episodes which were unnerving to say the least. I put it down to the camera 'seeing' hedges/fences on sharp bends. As soon as I found a way of completely deleting this system I have no further problems.

Please don't confuse Lane Keep Assist with Forward Collision system. LKA is shit and needs switching off. Sudden "Automatic Breaking" should not be initiated from LKA. You can set the FCS to Alert if you are afraid. My own feeling is I like FCS and it is better to learn how to live with it (ie indicating or not rolling towards a parked car etc). You may REALLY need it one day.

 

[OriginalBigAl]

In an effort to try to get used to this system here is an idea. Take some weak cardboard boxes and a quiet car park and drive up to them , normally, in neutral and rolling, weaving etc . See what the effects are (apart from looking like Bodie and Doyle) and it will give you some idea of the braking forces involved, along with the different situations. Understanding and not then being as surprised by the FCS can only help.