DISA (Differentiated Air Intake System)

[Marlon]

I've been reading all about this problem, my question is does it affect 2.0 engines?
I can't find a single thread that mentions the N46 Engine having issues. (mine is a 2.0 E85 Roadster 2006 facelift)
I ask because I have a slight rattle when pulling away in first and second gear at low revs, other than that the car drives faultlessly (also it a high mileage car 98k)

 

[mac27040]

as far as i can see the DISA issue most of us get is related to the 2.5 or 3.0i engines, the 2.0i is a different setup.

 

[Marlon]

Thanks mac, it would make sense as I can't find any 2.0 owners discussing it nor can I see it in my own engine or find any online pics or descriptions of the DISA for 2.0 engines.
So hopefully my rattle is just a rattle

 

[nfarmer]

Real OEM shows the DISA fitted as below:

Part 11617544805 (Adjuster unit) was found on the following vehicles:
E39: Details on E39
E39 530i Sedan

E46: Details on E46
E46 330Ci Coupe
E46 330Ci Convertible
E46 330i Sedan
E46 330xi Sedan
E46 325Ci Coupe
E46 325i Sedan
E46 325i Touring

E53: Details on E53
E53 X5 3.0i SUV

E60: Details on E60
E60 530i Sedan

E83: Details on E83
E83 X3 3.0i SUV

E85: Details on E85
E85 Z4 3.0i Roadster

Z3: Details on Z3
Z3 Z3 3.0i Roadster
Z3 Z3 3.0i Coupe

 

[AnttiO]

Here is exploding view , 2006 2.0i engine intake manifold

http://2009.bmwfans.info/parts/catalog/E85/Roadster/Europe/Z4_2.0i-N46/LHD/N/2006/february/browse/engine/intake_manifold_system/

 

[Marlon]

Thanks guys, the last two posts seem to confirm I have nothing to worry about regarding the DISA issue and the 2.0i engine.
(nfarmer - I'm surprised that the list doesn't include the E85 Z4 2.5i since this has been talked about lots on the forum with regard to the DISA issue?)

 

[AnttiO]

All M54 engines do have DISA. 2.2i , 2.5i or 3.0i

 

[nfarmer]

All M54 engines do have DISA. 2.2i , 2.5i or 3.0i

True wide's E46 2.2i has one 'coz I checked it some time ago

 

[nfarmer]

Double checked its a different part number for the 2.5i but both (i think) part numbers have been superseded with 11617502275 - check with your local friendly :rofl: dealer

Part 11617544806 (Adjuster unit) was found on the following vehicles:
E39: Details on E39
E39 525i Sedan
E39 525i Touring

E46: Details on E46
E46 320i Sedan
E46 325Ci Coupe
E46 325Ci Convertible
E46 325i Sedan
E46 325i Touring
E46 325xi Touring
E46 325xi Sedan

E60: Details on E60
E60 525i Sedan

E83: Details on E83
E83 X3 2.5i SUV

E85: Details on E85
E85 Z4 2.5i Roadster

Z3: Details on Z3
Z3 Z3 2.5i Roadster

 

[mac27040]

here is the list including the 3.01 z4

Part 11617544805 (Adjuster unit) was found on the following vehicles:
E39: Details on E39
E39 530i Saloon, Europe
E39 530i Touring, Europe

E46: Details on E46
E46 330Ci Coupé, Europe
E46 330Ci Convertible, Europe
E46 330i Touring, Europe
E46 330i Saloon, Europe
E46 330xi Saloon, Europe
E46 330xi Touring, Europe

E53: Details on E53
E53 X5 3.0i SUV, Europe

E60: Details on E60
E60 530i Saloon, Europe

E65: Details on E65
E65 730i Saloon, Europe

E66: Details on E66
E66 730Li Saloon, Europe

E83: Details on E83
E83 X3 3.0i SUV, Europe

E85: Details on E85
E85 Z4 3.0i Roadster, Europe

Z3: Details on Z3
Z3 Z3 3.0i Coupé, Europe
Z3 Z3 3.0i Roadster, Europe

 

[DMike]

Should the DISA valve be replaced with the revised one just in case, or is it ok to wait until rattle, fault codes or other symptoms? I've read about the disastrous events if the metal pin falls into the engine...

 

[Yamiuchi]

Checking the DISA is straight forward there are a few great guides on here, luckily mine looked like it had been replaced, I would have thought plastic or metal breaking off isn't going to be a good thing, as for the metal one everyone seems to be going that way if it needs replacing due to no wear on tear on replacement parts.

 

[DMike]

Checked mine and it seemed fine. Wiped clean and put back. Took only a few minutes, so I'll add "inspect DISA" to my oil service routine.

 

[kowsmou]

.

 

[Marlon]

Just bought my first Z4, it's a 2007 2.0 so same engine as yours. I've seen all the horror stories about the DISA valve and this is the only thread I can find for the 2.0 engine. Can I still assume it's not an issue for the 2.0 ?

That was 2 years ago - I traded my 2.0 for a 3.0 si in June 2015.
Hopefully someone will be along to answer your question definitively

 

[yyz_bobby]

so does the 2.0l have a DISA?

 

[tug]

No