Sudden automatic braking issue (merged, MG4)

Oh! So this does happen. Today, I was at the receiving end of the ghost AEB. Was coming down a hill and turning right in a 20mi zone. Cleared the turn and the very next moment the car triggers AEB. Only a red Ford in the opposite lane and nothing behind (fortunately). My previous car had collision alerts but it never intervened like this. So the phantom alerts were just alerts that could be ignored. New experiences with the car.
 
fourevah said:
Oh! So this does happen. Today, I was at the receiving end of the ghost AEB. Was coming down a hill and turning right in a 20mi zone. Cleared the turn and the very next moment the car triggers AEB. Only a red Ford in the opposite lane and nothing behind (fortunately). My previous car had collision alerts but it never intervened like this. So the phantom alerts were just alerts that could be ignored. New experiences with the car.
Click to expand...
exactly like this for me. Just as i turned right WHAM the car did a stop. The speed was very low because I was turning right coming out of a side road but it is not a nice experience. So there must be something to do with turning right.....
 
fourevah said:
Oh! So this does happen. Today, I was at the receiving end of the ghost AEB. Was coming down a hill and turning right in a 20mi zone. Cleared the turn and the very next moment the car triggers AEB. Only a red Ford in the opposite lane and nothing behind (fortunately). My previous car had collision alerts but it never intervened like this. So the phantom alerts were just alerts that could be ignored. New experiences with the car.
Click to expand...
Red Ford? That is always serious trouble.....

Joke aside: the Ford was approaching you. How far away was it approximately?
 
FrancisM said:
I'm wondering if the AEB was not adequately tested for countries where they drive on the left.
Click to expand...
You could be right, or we can shorten your sentence to adequately tested full stop.

Oil leak backs that up
LKA
Vibration in X power
Under tray
Locking in issue

The list is long and not distinguished
 
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fourevah said:
Oh! So this does happen. Today, I was at the receiving end of the ghost AEB. Was coming down a hill and turning right in a 20mi zone. Cleared the turn and the very next moment the car triggers AEB. Only a red Ford in the opposite lane and nothing behind (fortunately). My previous car had collision alerts but it never intervened like this. So the phantom alerts were just alerts that could be ignored. New experiences with the car.
Click to expand...
It's dramatic, isn't it? Clearly the brakes on the MG4 are effective, you stop almost instantly below 15mph in normal conditions when you stamp on them. Alarming when the car decides to randomly stop for you though.

Which is the whole problem. Clearly the AEB, like the LKA, is not fit for purpose, or at least not fit to be on by default. This is amply demonstrated by lots of people on this forum recommending that it be turned off to improve the driving experience. It's not an effective safety feature if people are actively encouraged to disable it because of poor performance and mandating that these systems be on by default is a terrible decision by regulators without also requiring proof that they work without being intrusive, ie noticeable, to drivers.
 
YaR said:
It's dramatic, isn't it? Clearly the brakes on the MG4 are effective, you stop almost instantly below 15mph in normal conditions when you stamp on them. Alarming when the car decides to randomly stop for you though.

Which is the whole problem. Clearly the AEB, like the LKA, is not fit for purpose, or at least not fit to be on by default. This is amply demonstrated by lots of people on this forum recommending that it be turned off to improve the driving experience. It's not an effective safety feature if people are actively encouraged to disable it because of poor performance and mandating that these systems be on by default is a terrible decision by regulators without also requiring proof that they work without being intrusive, ie noticeable, to drivers.
Click to expand...
It's not a terrible decision by regulators it's a terrible implementation by MG.

There have been later updates that have made both far more trustworthy but for some reason known only to MG they haven't routinely done it to everyone's car before pickup/at service.
 
Just one example of why they should be updating software etc. for free at every service ... ROAD SAFETY.

Are you listening MG UK ???? ... or don't you care ?

www.which.co.uk

Which? car testing reveals serious concerns with MG4's lane assist technology - Which? News

Which? lab technicians report concerning behaviour caused by the popular family car's lane assistance and departure-warning technology
www.which.co.uk www.which.co.uk

and the follow up response by MG

www.which.co.uk

MG responds to reports of lane-assist concerns from MG4 owners - Which? News

Following a Which? report of lane-assist steering problems with the MG4, numerous drivers got in touch to share their experiences
www.which.co.uk www.which.co.uk
 
Only been one recall as well.

There is a recall for the MG4 vehicle in the UK due to a potential for the car to superlock while still running:
Recall number: R/2022/355
Recall date: January 7, 2023
Affected vehicles: 1,960
Repair: A software update

When a vehicle is affected by the recall, the doors will lock and cannot be opened, the remote key will be disabled, and the windows will not work.

To check if a vehicle is affected by the recall, you can contact the local MG MOTOR dealership or manufacturer.

But hey that unreliability survey is way off🤔
 
Yeah the DVSA in the UK are useless as well IMHO .... no teeth at all to protect consumers.

This is their laughable (IMHO) reply to a recall on MG4 LKA given to Which? :-

‘DVSA investigations show this issue does not meet the criteria for a safety recall. Drivers who experience this are able to maintain control of the vehicle at all times, and they can switch off the system to allow the vehicle to be used."

Not what the Which report stated at all and why all the new regs to put LKA on new cars if the DVSA answer is to turn it off ??😁🤷‍♂️
 
LenEV2016 said:
It's not a terrible decision by regulators it's a terrible implementation by MG.
Click to expand...
No, I strongly disagree with this. The responsibility of regulators is to ensure that minimum standards are appropriate before mandating them as compulsory. If MG make a compulsory system that doesn't work effectively and have it approved, then primary responsibility for it being sold to customers is on the regulator. They're the ones that signed it off. Buck stops with them. Nobody is alleging that MG committed fraud or error regarding the NCAP tests, so it is the tests at fault.
 
YaR said:
No, I strongly disagree with this. The responsibility of regulators is to ensure that minimum standards are appropriate before mandating them as compulsory. If MG make a compulsory system that doesn't work effectively and have it approved, then primary responsibility for it being sold to customers is on the regulator. They're the ones that signed it off. Buck stops with them. Nobody is alleging that MG committed fraud or error regarding the NCAP tests, so it is the tests at fault.
Click to expand...
Do you honestly think the car that they sent for testing wasn't working pretty much exactly as it should.
They are not going to send a complete bag of bolts for testing, it would have been checked and double checked before they handed it over.
 
LenEV2016 said:
Do you honestly think the car that they sent for testing wasn't working pretty much exactly as it should.
They are not going to send a complete bag of bolts for testing, it would have been checked and double checked before they handed it over.
Click to expand...
Many of the issues reported about LKA were linked to situations not tested properly. And to be honest, most of them are not even relevant for homologation.
 
YaR said:
No, I strongly disagree with this. The responsibility of regulators is to ensure that minimum standards are appropriate before mandating them as compulsory. If MG make a compulsory system that doesn't work effectively and have it approved, then primary responsibility for it being sold to customers is on the regulator. They're the ones that signed it off. Buck stops with them. Nobody is alleging that MG committed fraud or error regarding the NCAP tests, so it is the tests at fault.
Click to expand...

Not quite what Euro NCAP say but I agree that testing needs to improve and include proper road driving :-

Quote from Which Magazine (regarding MG4 LKA problems) :

"Euro NCAP didn’t comment specifically on the MG4 but said: ‘Vehicle manufacturers have a responsibility to ensure that the vehicle performance seen on a test track is also reflected in on-road driving."
 
JonnyG said:
Not quite what Euro NCAP say but I agree that testing needs to improve and include proper road driving :-

Quote from Which Magazine (regarding MG4 LKA problems) :

"Euro NCAP didn’t comment specifically on the MG4 but said: ‘Vehicle manufacturers have a responsibility to ensure that the vehicle performance seen on a test track is also reflected in on-road driving."
Click to expand...
There you go it worked on a test track for NCAP and MG just said bollocks to real world driving and the safety and wellbeing of our customers
 
JonnyG said:
Not quite what Euro NCAP say but I agree that testing needs to improve and include proper road driving :-

Quote from Which Magazine (regarding MG4 LKA problems) :

"Euro NCAP didn’t comment specifically on the MG4 but said: ‘Vehicle manufacturers have a responsibility to ensure that the vehicle performance seen on a test track is also reflected in on-road driving."
Click to expand...
NCAP acts the same way the car manufacturers do: blame the other.

Homologation of a 2022 car meant it had to pas regular testing plus it needs to work according to the specific EU regulation about LKA (they use the name ELK system). The regulation describes the requirements of ELKS with two sub systems : LDWS and CDCF(Corrective Directional Control Function). The first one is the classic warning system (MG Alert mode), the second includes steering correction (no further distinctions are made in CDCF).
For LDWS an explicit requirement is that it works: "for solid line and dashed lane markings in line with one of those described in Annex 3 (Visible lane marking identification) to Regulation No 130 of the United Nations Economic Commission for Europe (UNECE) – Uniform provisions concerning the approval of motor vehicles with regard to the Lane Departure Warning System (3) and other markings expected on EU roads".
The manufacturer has to hand over a compliance document, and NCAP is supposed to verify. In 2021 and 2022 NCAP did not test all road markers. Only a limited subset (you can download their test descriptions to check). They never tested your MG4 in circumstances resembling british country roads (apart from the fact that it isn't EU anymore).
Manufacturers knew NCAP tested only a limited number of circumstances. So they 'adjusted' to that (edit: assumption). And NCAP already admitted they have to extend their tests to more real life circumstances.
Conclusion: they are both to blame.
 
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