MG4 Software Update Thread

[EV Focus RO]

Isn't LFP supposed to have more life cycles than NMC? My 64 kWh battery has 94.8% after 3.5 years

 

[Mouss]

Yep but more cycles with 51 kWh could be balanced with fewer cycles but bigger battery (64 kWh).

By the way, 1 cycle of LFP is 0.8 cycle of 64 kWh wich mean if you charge your NMC 64 at 80% daily, it's pretty much the same as having a 100% LFP battery

 

[paswotz]

For an LFP pack it's not that surprising ... after 1 year (actually 1.25 years from build) it was ~96%, after 2 years it was ~93%, after 3 years it was ~91%. So 90.66% now is pretty much as expected ... at the 4th service I suspect it'll be about 90%.

Mine also 96% After 2 years. Should be normal for SE with LFP

 

[siteguru]

I should add ... whilst the SOH is reported as 90.66%, I'm not experiencing any noticeable reduction in actual range across the 3 winters I've had this car. I've certainly not lost almost 10% of real-world range.

 

[Tight Git]

I should add ... whilst the SOH is reported as 90.66%, I'm not experiencing any noticeable reduction in actual range across the 3 winters I've had this car. I've certainly not lost almost 10% of real-world range.

Likewise with my 65k mile SR - can't say I noticed any drop in range after 3.5 years.

 

[siteguru]

Given that this model was quoted as having a 49kWh pack in the refreshed versions, vs the 51kWh (50.8kWh usable) ... I doubt that they fitted a different battery pack; perhaps the software interface changed so that the 0.2kWh buffer became a 2kWh buffer.

 

[WonkoTheSaneUK]

IIRC, it's only the new "MG4 Urban" that gets the 49kWh pack.
The existing MG4 SE disappears altogether
The Trophy changes its name to "Premium" and gets a 64kWh LFP pack instead of NMC
The ER's 77kWh pack & X-Power's 64kWh packs remain NMC

 

[siteguru]

Nah ... I'm fairly sure the SE SR was rebranded as having a 49kWh pack from the 2024 model?

 

[Mouss]

Totally right
And I think they changed the buffer maybe to a better control of SOH

 

[Backlash6920]

Car updated to SWI69-29958-1100R45 today ... only took 10 minutes tops (including resetting radio favourites and setting Dark theme).

I also checked SOH via Car Scanner while I was on ... 90.66% it said. (3.5 years old from build date).

Hi, have you noticed something different?
I'm on r40 right now, also did you update the module via sips?

 

[siteguru]

Not by SIPS - just by USB. (I have an SE SR which was previously on 1100R38 and had been previously updated to that by my dealer, including the HVAC module update, in November 2024).

There's nothing obviously different that I've seen at the moment, other than the screen seems a bit "snappier".

Note: you say R40 - what is your full software revision? (I don't recall there being an R40 for the SWI69-29958-1100Rxx software branch). If yours is SWI68-29958-1300R40 then you can update to R59 via USB ... anything after that will needs SIPS to be able to do a full update and calibration.

 

[Backlash6920]

Not by SIPS - just by USB. (I have an SE SR which was previously on 1100R38 and had been previously updated to that by my dealer, including the HVAC module update, in November 2024).

There's nothing obviously different that I've seen at the moment, other than the screen seems a bit "snappier".

Note: you say R40 - what is your full software revision? (I don't recall there being an R40 for the SWI69-29958-1100Rxx software branch). If yours is SWI68-29958-1300R40 then you can update to R59 via USB ... anything after that will needs SIPS to be able to do a full update and calibration.

SWI69-29958-1100R40.zip

 

[double68]

Does anyone know if it is possible to update the MPU of a MG4 Lux my24 with version 1300SWI33R30 to R36 via USB? Is it necessary to update other modules with SIPS afterwards? Thanks

 

[Mouss]

New MG's models moslty needs SIPS for infotainment updates.
EU/UK SWI132 or SWI133 build works with SIPS, no more USB update. But the engineering menu show "USB update", IDK why...

 

[hojnikb]

Totally right
And I think they changed the buffer maybe to a better control of SOH

Wasn't there a consensus, that LFP cars don't actually report real SOH over OBD, but just a calculated (-0,01%/day) value?

For example; if you compare estimated full WLTP range (once you reset the computer it defaults to that) with the actual new car WLTP range, the range is actually much higher, % wise, than what it should be if you taken into account the number OBD spits out.

Not sure if that calculation was ever fully confirmed, but it does make sense, that cars are degrading ~3%/year. In reality, LFP shouldn't degrade that fast. Well except a couple of % initially, since this car has no top buffer. But after ~95-93% SOH, degradation should level off and drop way more gradually.

 

[Mouss]

You are maybe right, but to be honest, I think EV cars SOH is still a myth for most car manufacturer because most of them buy the battery from a provider and they don't know in real life how each battery aged.

2 identical cars and exact same use, and SOH could be different !

 

[siteguru]

Wasn't there a consensus, that LFP cars don't actually report real SOH over OBD, but just a calculated (-0,01%/day) value?

If that was the case then it would be a linear degradation - it's not. At annual services mine have been 96% (-4%), 93% (-3%) , 91% (-2%)

Unless it's -0.01% of the current value rather than the rated maximum.

 

[yllanos]

So I went to my dealer yesterday. I was complaining to the fact that my car had more than a year since I bought it and had no GPS service. My service center is "Country Motors" in Barranquilla, Colombia.

Technician first used SIPS to update some modules but as expected, the problem did not go away.

 

[yllanos]

And then he made a call to "Los Coches" in Bogotá (the local importer) and some engineer took charge of the case remotely. He provided download link to apply a new update via USB:

They installed SWI68-29958-1300R63_SA2_D_PP which I have never seen before around here.

Maps are working with version 2024.Q2 HERE CSA (Central and South America)

 

[paswotz]

do you have access to his onedrive?