Net Battery capacity decrease for 07/23 model (81,1 to 76,6 kwh)

Pedro said:

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???

i4 M50 France said:

???

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Shows different part numbers for pre and post 3/2023 batteries

i4 M50 France said:

in any case, it is certain that the new i4s will have 5% less autonomy.

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I wouldn't say that anything was 'certain' quite yet. We don't know what a different 'net' figure means and some countries are still showing the 'old' figures.

The quesion:

why i5 have 83,9 brut and 81,2 kwh net, almost the same as i4 today ?

In Switzerland it decreased as well. I would really like to know what that means.

If the capacity is really decreased by 5%, I don't see how they can legally quote the same WLTP figure.

software optimization and new wltp test to update car range ?

i4 M50 France said:

software optimization and new wltp test to update car range ?

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The conversion from miles on the UK site is actually 4 miles less than the km quoted on the French site. I initially put it down to a rounding error but it may be a new test result.

I wonder if any software optimisation (if true) means that those of us with 2022 models will see an increase in range.

I also wonder if there has been an optimisation, it is reflected in 'real' usage or if they have just tailored it to do better in that particular test.

I think actual i4 would have increased range with software update, at least 5%.
Im sure bmw will never release updated wltp score (81,1 kwh) with new software.

Hmmm, waiting to see what the Audi A6/S6 E-tron offers might not be such a bad thing for me. I've gotten spoiled with 350 or so miles of range on the iX, and even the I-Pace with 2018 tech and 22" rims gets about the same range as the M50 on 20's. I would hate to see less if they are indeed cutting 5%.

The proof that the actual battery deliver 81,1 kwh.
the battery pack post 07/23 really need more buffer.


Battery

I find it hard to believe that BMW would change the battery pack after about 2 years of production. It is a long and expensive process to certify a new battery pack (or the cells it contains). In my opinion, it looks like a simple software optimisation excercise: how much can you increase the battery buffer without decreasing the range and having to recertify the WLTP/EPA results.

karol said:

I find it hard to believe that BMW would change the battery pack after about 2 years of production. It is a long and expensive process to certify a new battery pack (or the cells it contains). In my opinion, it looks like a simple software optimisation excercise: how much can you increase the battery buffer without decreasing the range and having to recertify the WLTP/EPA results.

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Many manufacturers have done battery changes after just a few years, it is rather common to do so I don’t see why BMW manage to do it. Audi has done it, Polestar/Volvo has done it, Tesla does it all the time so it wouldn’t be weird at all.

Not that you think I know the solution. But one possible reason could be to establish a differentiation to the i5.

Electric said:

Not that you think I know the solution. But one possible reason could be to establish a differentiation to the i5.

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Yeah I’ve been wondering the same, the i5 is bigger and has the same battery so even with the i5 having a better drag coefficient maybe they needed to nerf the i4 to not make the i5 look bad. So improve the i4s efficiency but software limit the battery to keep WLTP the same.

A this point i’d be surprised if it was just a bug on the website but who knows why they did it.

i4 M50 France said:

Hello,

i’ve just view in BMW configurator update from yesterday, the battery capacity change, it’s lost 4,5 kwh
i think they change the battery supplier.
i5 has the same specification of « old i4 »

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I suspect brut vs. net means how many kWh's you put in, vs how many you get out. The difference being "charging losses" of around 10%. These numbers are very similar to what I'm observing, using Charge History or EVSE figures to estimate "brut", and My Trips data to estimate "net". I typically have to put in about 85 kWh at the wall socket, and get about 77 kWh out during driving. (Although my car was built 12/22)

I think so, it’s to differenciate the i4 and i5, i4 M50, best perf, best range with 81,1 kwh and best price…

Is there official information about this? It would be unfortunate if instead of improving the range they reduce them. Involution.