Lane Assist reactivation.

[BrianCoote]

My MG4 Excite 51 was purchased in Australia in Jan 2025. Built July 2024 with all software updates. If Lane keeping assistance is disabled and confirmed upon pressing the brake (to engage gear) LKA is immediately reactivated. I have to engage Drive before deactivating LKA. If the car is stopped and Parking engaged without turning off the car LKA is activated again immediately the foot brake is pressed. This does not occur from braking while in drive nor does this happen with the Front Collision or Unsteady Driving Tabs.

 

[siteguru]

What you've described is "as intended" behaviour.

The car isn't properly "On" until you've pressed the brake pedal to put it into the READY state. (You don't have to engage Drive, merely get into the READY state). Turning off LKA (and some other settings) is pointless until you are in READY as they'll revert to their default (usually On) state as soon as you press brake.

Pressing the P button doesn't turn back on LKA (usually) - that happens when you open the driver's door. Again this is "as intended" behaviour as the car can't assume that the next driver will be you.

You can thank ANCAP (in your region, Euro NCAP in mine) for this state of affairs.

 

[Griffian]

IIRC LKA isn't available to switch off on our Trophy until after depressing the brake pedal.

 

[siteguru]

I know in the SE (Excite in Aussie speak) the option is there in the menu and it lets you turn it "off". The big clue that it hasn't worked though is that you get no "Are you sure?" type of prompt when doing so - something that you DO get once in the READY state.

 

[BrianCoote]

I still regard this as a software failure. After I sit on the driver's seat the car is alive. Being able to set switches on all other functions from one pedal driving, frontal collision etc as operating until the car is locked while only LKA doesn't is nonsensical to me.
I would turn off driver assist completely except that disables Cruise control.

 

[Kithmo]

When you say "without turning the car off" when stopped, are you leaving the driver's seat ?
Leaving the seat drops the car out of Ready mode, which is effectively to turning the car to accessory mode, so LKA will default to on again. To turn LKA off you need to be in Ready mode, sat in the seat and brake pedal pressed.

 

[hharzel]

I still regard this as a software failure.

MG's every software is a failure of epic proportions.

 

[Tuareg]

MG's every software is a failure of epic proportions.

No it isn't.

 

[decrep]

MG's every software is a failure of epic proportions.

Don't agree, not epic and not every.
Certainly some of it isn't good, fit for purpose or down right dangerous. But it is getting better, if you can get the updates.

I now, as a matter of routine, disable LKA at startup, then all is bright and cheerful, great fun to drive, best car I've had.

 

[Wizard of Oz]

I just leave LKA on - not a problem. In fact, I must be getting better at staying between the lines as it's activating less than it was.

 

[tsedge]

I still regard this as a software failure. After I sit on the driver's seat the car is alive. Being able to set switches on all other functions from one pedal driving, frontal collision etc as operating until the car is locked while only LKA doesn't is nonsensical to me.
I would turn off driver assist completely except that disables Cruise control.

I agree it is counterintuitive and poor design. It should at a minimum lock out settings from being changed before the car is in READY state.

 

[tsedge]

I just leave LKA on - not a problem. In fact, I must be getting better at staying between the lines as it's activating less than it was.

I'm now doing this too... with the improved LKA update. Occasionally the car gets confused but it works as well as many other makes now.

I'm conflicted about these systems, I see plenty of bad drivers with poor lane discipline who need this, at the same time such systems can never be perfect.

 

[Tuareg]

I don't have the latest LKA update but I never disable it. I might get 1 or 2 gentle tugs on the steering wheel over a 1-2 hour morning drive in urban areas. Not an issue, in fact it only comes to mind when I read these threads.

 

[Muffler]

I'm conflicted about these systems, I see plenty of bad drivers with poor lane discipline who need this, at the same time such systems can never be perfect.

Roll on the day when the car’s software will force drivers back to the inside lane instead of sitting in the middle of nowhere, not specifically overtaking, and totally oblivious to the faster traffic they’re holding up

 

[Mal Sydney]

Don't agree, not epic and not every.
Certainly some of it isn't good, fit for purpose or down right dangerous. But it is getting better, if you can get the updates.

I now, as a matter of routine, disable LKA at startup, then all is bright and cheerful, great fun to drive, best car I've had.

Absolutely agree

 

[Mal Sydney]

I agree it is counterintuitive and poor design. It should at a minimum lock out settings from being changed before the car is in READY state.

I was lucky enough to chat to an MG tech manager at Sydney Everything Electric show. The whole method of operation is dictated by Ancap and MG had to comply, including the annoying 2 selections process to disable the tug. I habitually disable it manually, as part of driving on the freeway. Reducing the sensitivity on the Alerts seems to help.
Also he told me that putting the blinker on disables the tugging..very handy at some intersections that have masses of lane markings, like the M2 entry at North Ryde.
Mal & MG4 64 Excite.

 

[HazardLights]

I don't have the latest LKA update but I never disable it. I might get 1 or 2 gentle tugs on the steering wheel over a 1-2 hour morning drive in urban areas. Not an issue, in fact it only comes to mind when I read these threads.

I have read of others on this position. I think it depends on which module software components a car had. Mine has the wrestle the starting wheel out your hands unless gripping it for dear life software. Infotainment upgrades made no difference. After the fix I leave LKA on and I have only felt the tug once and it was almost imperceptible. Some other MG4s have always had only gentle tugs.

 

[pjmmk]

I was lucky enough to chat to an MG tech manager at Sydney Everything Electric show. The whole method of operation is dictated by Ancap and MG had to comply, including the annoying 2 selections process to disable the tug

If that was the case all cars would be the same. My Tesla, for instance, allows a single tap on the screen to disable LKA with no confirmation required. MG's interpretation is obviously different to some others.

 

[Mal Sydney]

If that was the case all cars would be the same. My Tesla, for instance, allows a single tap on the screen to disable LKA with no confirmation required. MG's interpretation is obviously different to some others.

I think it depends on the age of the vehicle, as the rules became more stringent in recent years . I heard that a car from 3 years ago may not get the same number of ANCAP stars if it was tested today because it didn't have the same level of automation as current models .

 

[ReintjeWA]

If that was the case all cars would be the same. My Tesla, for instance, allows a single tap on the screen to disable LKA with no confirmation required. MG's interpretation is obviously different to some others.

It could depend on what year the models were tested, they could both receive 5 stars but on different criteria. The current model 3 is unrated for instance.

Edit: see @Mal Sydney beat me to it haha