Dealer reprogrammed my M4 ZCP and now if feels slower

[MackM4Comp]

Went in for a new radiator cap and for some reason they re programmed, it now feels so sluggish and isn’t accelerating like it did!! Is this just due to it resetting to my driving style or have they dialed something back on the update?? Not happy right now

[DDD31]

Took my 2018 M3 ZCP in recently for a check engine light and one of the diagnostic fixes the dealer employed was to reprogram the car. When I first got the car back it felt sluggish at first too but after driving it for awhile the car is back to the way it drove before the reprogramming, very fast and responsive!

[cionide]

From what I know transmissions kind of "learn" your driving style so most likely you need to drive it a bit and it will go back to how it was. When I got my M4 at first it felt really sluggish, shifted at wierd points now it drives normally.

[LOW4LYF]

There is no proof of any power changes between different software levels.
After flashing all adaption data are deleted so that could be your issue. Just give it some time.

[MackM4Comp]

Having driven it for a day it looks like it’s going back to what it was

[boss2k]

Originally Posted by cionide

From what I know transmissions kind of "learn" your driving style so most likely you need to drive it a bit and it will go back to how it was. When I got my M4 at first it felt really sluggish, shifted at wierd points now it drives normally.

Is this "learn you driving style" applicable for MT also or only for DCT?

[jailonacs99]

All a matter of perspective I suppose. Here's a whole thread of folks trying to make sure they have the latest software:

https://f80.bimmerpost.com/forums/sh....php?t=1261500

You're lucky, normally they only upgrade when a major component or something in the head unit gets replaced.

[Flacht3]

Originally Posted by LOW4LYF

There is no proof of any power changes between different software levels.

You sure? If I recall correctly, some early builds (mainly 2015) were neutered slightly via software updates to try and help with some of the torque/traction issues but I could be wrong. Those software versions would be pretty old at this point though.

[GrussGott]

Originally Posted by Chris_DM

You sure? If I recall correctly, some early builds (mainly 2015) were neutered slightly via software updates to try and help with some of the torque/traction issues but I could be wrong. Those software versions would be pretty old at this point though.

Nope, that's true, at least it was for mine - I specifically told the dealer no software updates as I had an OG 2015 and it was spikey as hell, just a vicious bitch.

Then for lease turn-in I did all of the updating and servicing (to avoid any problems) and they neutered both the throttle response and DCT software. My 2018 CP isn't near as demented as the OG 2015.

[LOW4LYF]

Originally Posted by GrussGott

Nope, that's true, at least it was for mine - I specifically told the dealer no software updates as I had an OG 2015 and it was spikey as hell, just a vicious bitch.

Then for lease turn-in I did all of the updating and servicing (to avoid any problems) and they neutered both the throttle response and DCT software. My 2018 CP isn't near as demented as the OG 2015.

There is no proof or any dyno runs which can approve your theory.

So you are saying a 2015 M3/M4 is faster than a 2017 M3/M4? I'm sure there is changes in power output, throttle response etc. over the years in the software, but... The early S55 don't have more power or are any faster than a current model.

[GrussGott]

Originally Posted by LOW4LYF

There is no proof or any dyno runs which can approve your theory.

So you are saying a 2015 M3/M4 is faster than a 2017 M3/M4?

I'm saying the software for throttle and DCT response is way wussified 2015 to 2018 CP which doesn't mean "slower", it means "less fun".

My 2018CP is faster in every way than my 2015, it's just not as scary in getting there. Another example is the kickdown shift - in the 2015 it would drop you to 3rd even if there were a few RPM left, in the 2018 it'll only pick 4th even when there's plenty of RPM left. Fine by me because I only drive manually so I never use that, but someone pointed it out, I tested it a bunch and, yup, wussier.

Anyway, my theories have a 100% track record ... like I predicted chicks could open beers with their boobs and voila:

[doug_999]

Originally Posted by LOW4LYF

So you are saying a 2015 M3/M4 is faster than a 2017 M3/M4? I'm sure there is changes in power output, throttle response etc. over the years in the software, but... The early S55 don't have more power or are any faster than a current model.

Actually... they did. BMW changed the torque for I think 2017 (could be 2016) cars. Max/peak now comes on later and I believe it is lowered.

There are a couple of threads here on it. As the GrussGott puts it - the 2015s were a vicious bitch down low.

[LOW4LYF]

Originally Posted by doug_999

Actually... they did. BMW changed the torque for I think 2017 (could be 2016) cars. Max/peak now comes on later and I believe it is lowered.

There are a couple of threads here on it. As the GrussGott puts it - the 2015s were a vicious bitch down low.

Again, you can change throttle response, dsc sensibility etc. but the HP max. peaks never changed. People would return the car if it would be proven slower after the update. Every manufacturer continue developing and bug fixing after a car is launched.

First HP change was the ZCP.

[GrussGott]

Originally Posted by LOW4LYF

Again, you can change throttle response, dsc sensibility etc. but the HP max. peaks never changed. People would return the car if it would be proven slower after the update. Every manufacturer continue developing and bug fixing after a car is launched.

First HP change was the ZCP.

I'll give back my HP for the 2015 tuning.

[paliknight]

Should have gotten 6spd. Wouldn't need to worry about this issue.

[LOW4LYF]

Originally Posted by paliknight

Should have gotten 6spd. Wouldn't need to worry about this issue.

That's not correct. You have also some data to adapt in the engine ECU.

[M3SQRD]

Originally Posted by LOW4LYF

Again, you can change throttle response, dsc sensibility etc. but the HP max. peaks never changed. People would return the car if it would be proven slower after the update. Every manufacturer continue developing and bug fixing after a car is launched.

First HP change was the ZCP.

BMW changed the torque curve at low RPM which doesn’t affect peak power. Take a look at the torque curves (2nd plot) in this link:
https://f80.bimmerpost.com/forums/sh...07&postcount=1

[LOW4LYF]

Originally Posted by M3SQRD

BMW changed the torque curve at low RPM which doesn’t affect peak power. Take a look at the torque curves (2nd plot) in this link:
https://f80.bimmerpost.com/forums/sh...07&postcount=1

Can we please see one official BMW document where this is mentioned?
All I see is different dyno charts with different cars.



Different software levels can feel different, no doubt. But a 2015 S55 is not faster as the same speced out 2018 S55.

My car had 16-7, 16-11 and 17-3 software without any significant changes.

[M3SQRD]

Originally Posted by LOW4LYF

Can we please see one official BMW document where this is mentioned?
All I see is different dyno charts with different cars.



Different software levels can feel different, no doubt. But a 2015 S55 is not faster as the same speced out 2018 S55.

My car had 16-7, 16-11 and 17-3 software without any significant changes.

Here are official BMW S55 power-torque curves for the original (2015) non-ZCP and CS (low rpm torque delivery is the same for ZCP). The original non-ZCP has peak torque starting at 1850 rpm...

2015 Non-ZCP:
https://f80.bimmerpost.com/forums/at...0&d=1398184385

CS:
https://f80.bimmerpost.com/forums/at...1&d=1492789550

[AW BMW]

Originally Posted by GrussGott

I'll give back my HP for the 2015 tuning.

I completely agree with this statement! My 2015 M3 had a violent low end, made so much fun to drive. My 2018 ZCP does not have the same low end grunt, not saying it is any slower it just does not have the rush like the 2015 had. Either way I am still happy with my 2018 as it is plenty fast for me.

[doug_999]

Originally Posted by LOW4LYF

Again, you can change throttle response, dsc sensibility etc. but the HP max. peaks never changed. People would return the car if it would be proven slower after the update. Every manufacturer continue developing and bug fixing after a car is launched.

First HP change was the ZCP.

Talking torque and yes it did change. But nobody returned their car over it

Edit - there are plenty of threads on this. The car did not get slower - but became more driveable. Those that have experienced the change say it is very noticeable in day to day driving.

[Flacht3]

Originally Posted by LOW4LYF

Can we please see one official BMW document where this is mentioned?
But a 2015 S55 is not faster as the same speced out 2018 S55.

Faster, no. Different level of response and output, yes.

We're talking torque curve changes, not adding/removing HP. Not sure why you're focused on HP here.

The early 15s had different low-end response until software was updated. Doesn't mean they were "faster".