[brainf18]

6 Speed Manual Owners who, like me, do not like rev matching can disable this function. There are literally hundreds of posts on this topic so it took a while to weed through the chaff to find actual good information.

I've summarized what I found that worked on my 2021 M2C. On my car, which rolled off the assembly line in June 2021 making these changes resulted in no negative side effects. Others have noticed a slight RPM increase or Hill Start Assist no longer working. Based on feedback from others who've tried this it is possible to encounter these effects....However on my "specific" car, I didn't have any of these issues.

Step 1 - Download the Bimmercode App and get a OBD2 scanner. I like Veepeak
Step 2 - Select: Front Electronics Module
Step 3 - Select: Expert Mode
Step 4 - Select: TcMaster
Step 5 - Select: TCM_Startlock_Brake - aktiv
Step 6 - Select: TCM_Startlock_Clutch - nicht_aktiv
Step 7 - Select: TCM_Startlock_Drivingreadiness - nicht_aktiv

Then just "code" the car. This will disable the clutch pedal position sensor and turn off rev matching. I did this to my 2021 M2C with no side effects or any other issues.

Starting...Put the clutch in and your other foot on the brake, and the car starts with ONE PUSH of the engine start button.

Hill start roll back assist WORKS!

No increase in RPM in any phase of driving.

The clutch feels much smoother without any bucking or weird take up feel that happened with auto rev matching. Car is much improved...And with Bimmercode I can always revert to the OEM configuration if I feel the need.

[BGR]

I’ll have to give this a try with my June 2021 production car. Thanks

[(K)]

While it doesn't bother me a whole lot, there are times when the system mistakenly blips the throttle as I shift to neutral. I may try this, thank you.

[captain slowly]

I must be in the minority, but I actually like the rev matching. In any case, good info to have.

[phriz]

Originally Posted by captain slowly

I must be in the minority, but I actually like the rev matching. In any case, good info to have.

I enjoy it too, but am glad there's an option to disable it. With practice, I find I can beat the auto rev match if I heel toe quickly enough. Thanks OP for consolidating the info on this topic.

[MooMooM2]

I also like the rev matching and say 8/10 times I want it on but would have been nice to have us let it turn it off because sometimes Id love to not have it and have hell toe shift fun.

Thanks for this post, nice guide, I may have to try it sometime.

[IcewaterPete]

Excellent details. Many thanks!!

[Moflow]

Thanks for compiling this, might give it a try. I’m assuming there’s no way to turn it back on without recoding it again? I wish it was switchable like in most cars with this feature.

[brainf18]

Originally Posted by Moflow

Thanks for compiling this, might give it a try. I’m assuming there’s no way to turn it back on without recoding it again? I wish it was switchable like in most cars with this feature.

Recoding with Bimmercode is a 20 second event. Its not as easy as a switch bu not much harder than that.

[boss2k]

Why you dont like rev matching , i love it when the car does it for me. If you disable how do you rev match yourself and throttle blip?

[Capt Canuck]

Originally Posted by boss2k

Why you dont like rev matching , i love it when the car does it for me. If you disable how do you rev match yourself and throttle blip?

[smknjoe]

Originally Posted by boss2k

Why you dont like rev matching , i love it when the car does it for me. If you disable how do you rev match yourself and throttle blip?

[veenut28]

Thanks for posting this. I briefly played around with it last year but turned auto rev matching back on for convenience (and bc I had gotten used to it so I kept forgetting to blip the throttle on downshifts).

I'm going to try it again. It does feel more like a traditional manual to me, maybe less smooth if you're not perfect at matching the revs yourself, but if that's a concern then just get the DCT, right?

[boss2k]

Originally Posted by smknjoe

Thanks for the video, i can rev match without brake easily but not tried the throttle blip and prefer the car to do it

Although in my vette i can turn rev match off and try it

[COChris]

Originally Posted by (K)

While it doesn't bother me a whole lot, there are times when the system mistakenly blips the throttle as I shift to neutral. I may try this, thank you.

It's so lame at times. Harley-esque.

[CannibalOx]

Does turning off the rev matching really have an impact on clutch engagement?

[brainf18]

Originally Posted by CannibalOx

Does turning off the rev matching really have an impact on clutch engagement?

YES. It makes it way better. There's a weird but noticeable judder with rev matching turned on when the clutch pedal is let out. I hated it. Also if you downshift early to prepare for a slow corner the revs jump way up even though the clutch is still in and engagement isn't planned until a much slower speed. As a racer, and enthusiast the auto rev matching is a unwanted party trick that is really annoying.

[Enabled]

You can get a feel exactly how it would be by holding DSC off button for 5 seconds or so.

In my car, all the auto revmatches have been perfectly accurate. I have been heel-and-toe driving since 2004 on track and off.
I don't mind it holding the rpm or blipping on its own.

For drivers that aren't that great at revmatching/timing the clutch release, the clutch will wear less with auto revmatch.

It's a well made feature, but I can understand some that would want to turn it off. OP's research was excellent.

[CannibalOx]

Originally Posted by brainf18

YES. It makes it way better. There's a weird but noticeable judder with rev matching turned on when the clutch pedal is let out. I hated it. Also if you downshift early to prepare for a slow corner the revs jump way up even though the clutch is still in and engagement isn't planned until a much slower speed. As a racer, and enthusiast the auto rev matching is a unwanted party trick that is really annoying.

That's awesome! The odd feel/engagement has been one of my major gripes with the car.

Originally Posted by Enabled

You can get a feel exactly how it would be by holding DSC off button for 5 seconds or so.

In my car, all the auto revmatches have been perfectly accurate. I have been heel-and-toe driving since 2004 on track and off.
I don't mind it holding the rpm or blipping on its own.

For drivers that aren't that great at revmatching/timing the clutch release, the clutch will wear less with auto revmatch.

It's a well made feature, but I can understand some that would want to turn it off. OP's research was excellent.

I have love, hate feelings toward it. For normal driving I love it. For spirited driving I prefer it not being active. Too bad they didn't at least make it an iDrive option.

[Happy77]

I made this codify on april 2021. I'm every day more satisfied.

https://f87.bimmerpost.com/forums/sh...1597497&page=5

[.Slug]

I'm not sure what you mean by "side effects" but with my 2021 M2C to turn off the rev matching, all I need to do is put the car into sport+ with traction control turned completely off (mdm also off). This eliminates the rev matching in my car. Having traction control off might be considered a "side effect" because it makes the car a bit unsafe for the untrained driver, but seems to do the trick without any code programming for me.

[Happy77]

Originally Posted by .Slug

I'm not sure what you mean by "side effects" but with my 2021 M2C to turn off the rev matching, all I need to do is put the car into sport+ with traction control turned completely off (mdm also off). This eliminates the rev matching in my car. Having traction control off might be considered a "side effect" because it makes the car a biti unsafe for the untrained driver, but seems to do the trick without any code programming for me.

you are lucky. I have a 118d and if i set sport + and traction control off i still have rev match active.
So i found that code by bimmercode to turn off rev match permanently