[VIERsr]

Sometimes I had cel and limp mode after 10 kms, some other times nothing for hundreds of kilometers. Sometimes I can push to the rev limiter with no issues (one time I also reached the speed limit), some other times it goes in limp mode if I go full throttle at 3000 rpm. No logic, the only way is to remap if you want to push hard your car and have no issues.

[kart driver]

But isn’t there an easy solution with the AK Motion unit which helps to resolve the issue completely after removing OPFs?

[VIERsr]

Yes it's a solution.
Easy? I don't know.
Nice looking? Not for me.

[doughboy]

Originally Posted by NISFAN

I wonder if relocating the sensor tubes from after the catalytic converter to before, will fool the electronics by reporting back a pressure reading?

For those that don't know, the OPF fitted cars have a pressure measuring sensor in each exhaust. The pressure sampling tube is placed after (downstream) of the primary CAT, but before the 2ndary CAT / OPF canister. So it effectively measures exhaust pressure just prior to the OPF /CAT2 system. I guess when it sees a high reading threshold, it triggers an active regeneration. But at all times it needs to see some kind of reading as a test. That's why a total OPF delete triggers CEL/LIMP.

My thinking about how to fool it is in three forms. And by the way, I'm looking at replacing the OPF canister mid pipe to earlier style 2nd CAT type, not a full delete. Some of the techniques below could work for full delete too.

If you're putting secondary CATS back you should be fine. I did that and had no CEL, presumably as the cats give a back pressure that fooled the opf sensor.

[Mark 1M]

Originally Posted by prompt

Did you do a remap or something else?
How many miles have you done since removing it?
Do you drive the car hard,I mean revving over 5k rmp?

No remap car is standard.
around 1k no cel light.
it has been over 5k and no issues so far.
this mod was also done on a 2019 m4 comp and no problems with it the owner is a bmw tec.

[M2_MEDUSA]

Forgive me for my inability to understand basic terminology but I have a few questions:

1. What is an OPF and do all m2c models have them even in USA?
2. So I can’t put a AA midpipe on my car without it freaking out?

Thanks

[kart driver]

Originally Posted by SpecialEdition_F87

Forgive me for my inability to understand basic terminology but I have a few questions:

1. What is an OPF and do all m2c models have them even in USA?
2. So I can’t put a AA midpipe on my car without it freaking out?

Thanks

The issue is non-existent for USA cars. You don’t have OPFs.

[RafBsac]

Hi from France guys !

For those who have to deal with OPF deleting issue regarding limb mode, THE ONLY SOLUTION : OPF Deleter by LEIB Engineering

https://www.leib-engineering.de/en/l...mpetition-f87n

So happy to find-out this system, my full Active Autowerke Equal Length resonated Midpipe and rear valved exhaust is on order !

This solution is BMW warranty friendly !

Enjoy ! ;-)

[Sammy_V]

Originally Posted by RafBsac

Hi from France guys !

For those who have to deal with OPF deleting issue regarding limb mode, THE ONLY SOLUTION : OPF Deleter by LEIB Engineering

https://www.leib-engineering.de/en/l...mpetition-f87n

So happy to find-out this system, my full Active Autowerke Equal Length resonated Midpipe and rear valved exhaust is on order !

This solution is BMW warranty friendly !

Enjoy ! ;-)

Hi there France
This is Belgium calling

How is your first experience with this?
Thx for the feedback
Sam

[prompt]

Originally Posted by RafBsac

Hi from France guys !

For those who have to deal with OPF deleting issue regarding limb mode, THE ONLY SOLUTION : OPF Deleter by LEIB Engineering

https://www.leib-engineering.de/en/l...mpetition-f87n

So happy to find-out this system, my full Active Autowerke Equal Length resonated Midpipe and rear valved exhaust is on order !

This solution is BMW warranty friendly !

Enjoy ! ;-)

Any direct experience on this?
To me it looks like a simple bypass on the opf sensors near the gearbox,is just this or requires something else?

[MR.]

Originally Posted by prompt

Any direct experience on this?
To me it looks like a simple bypass on the opf sensors near the gearbox,is just this or requires something else?

Nothing else, just a bypass cable.

MR

[RafBsac]

Sorry guys, like a lot of people, I'm still waiting for my AA EL midpipe and axle-back.
I didn't install the LEIB OPF Deleter yet, but different feed-backs are good !

[RafBsac]

The Leib OPF Deters work perfectly ! Quite difficult to install on M2C's because of the lack of space but it works perfectly !

[leshkin]

Originally Posted by RafBsac

The Leib OPF Deters work perfectly ! Quite difficult to install on M2C's because of the lack of space but it works perfectly !

I just got my harness too, but instructions on how to do it are beyond vague Did you follow a guide to do this or just took bits off until you could access the sensors? Any tips would be most welcome

[Irielion]

I removed my OPF and after some hard runs it went into limp mode. The car stil drove oke, but without the strong power. With the Leib connectors it didn't went into limp mode anymore.

[Crossmax]

To everyone using the Leib OFP Delete module: are you still happy with it? Are you getting any error codes/limp mode at all, or has it been a solid fix?

[Rub1con76]

I got a lightweight performance exhaust with AA single midpipe installed with leib connectors since May 23.

Intil last week not a single issue.
When i drive into Germany I got a drivetrain warming and limpmode.

Restart and fault was gone but drove to the nearest dealership. They told me the exhaust pressure sensor was the problem.
On the rest of the trip 2 more limp modes at different speeds.

I also have an AK Motion 1st gen installed for a longer period.

Today I drove about 2 x 20 km en after 5 km or so I got an engine light.

I don’t understanding Why this is happening after all these months.

[Dutch Devotion]

Hi, I have been driving with AK too and although you disable the OPF with that strange wire fix where you had to solder the wires yourself to their motherboard (really WTF!) it never worked. (no support from AK or whatsoever so I had it taken back out of the car).

Have also tried the sensor cheats (Leib engineering or something) too, which did not work either., and recently noticed they are not offering them anymore.

Only thing that worked for me and never threw a CEL or put the car in drivetrain error (limb), was to disable it in Bootmode3 and I suppose MHD offers a similar solution.

Hope this helps.

[doughboy]

Mines a 2018 car (never updated) and when I first ran without DPF I got no CEL at all.

But I still disabled OPF & CAT in BM3 as I run decat too now.

I think one of the subsequent BMW DME updates also increased DPF sensor sensitivity which meant other folks got quick CEL/limp when removing OPF.

[Rub1con76]

Today I went to my carshop and he connected it to ista.
2 fault codes that appeal on the AK to came up on ista.

Of you delete the codes they will show up again without starting the engine.
So the installer thinks that the leib Connectors are the issue.

I contacten them so i’m waiting for their feedback

[fourthchirpin]

what is the OPF, is this the same as the Cat?

is there a photo of this?

[doughboy]

OPF is an EU thing (maybe other territories too).

Petrol Particular Filter (OPF in German)

It replaces secondary CATs under the car with more restrictive canisters to remove soot from the exhaust gases but they sap power and make the exhaust much more muted.