BMW E46 DISA VALVE - The WHAT, the HOW, and the WHY it WORKS & FAILS [2021]
THE BMW DISA VALVE on your E46 with the M54 engine plays an important role in creating performance and fuel economy. But what's its purpose in the intake system? How does it work? And how does it FAIL?
If you have strange noises in and around the intake manifold, and a lack of high-end performance, the DISA Valve could be the cause. To give you an understanding I give you all the answers to better understand the DISA Valve and fix the problem.
⭐️ Error Codes possibly associated with a Faulty DISA
P1083; P1085 - Lean Condition
P1090; P1092 - Front Oxygen Sensor Lean
P1087; P1089 - Oxygen Sensor Slow Response
P0311; P0316 - Cylinder Misfire
P0174 - System Too Lean
➡️ NEW Replacement DISA Valve from ECS Tuning (this is an Affiliate Link).
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▶️ DISA VALVE Upgrade Kits
www.germanautosolutions.com
www.x8r.co.uk
(These are not affiliate links).
😎 Thanks for watching, and I look forward to seeing you in my next video.
Man please don’t stop making videos, you’re like the bob ross of bmw informational videos
Good description
THANK YOU SO MUCH, thanks to you I think I figured out my issue which none of my other mechanics could do
Great explanation - you have a talent of explaining in a very easy to understand manner.
Best explanation on the DISA valves ever. This obviously applies to the n52 as well. But hopefully you can include a tear down of the n52 disa valve eventually
Goodness me. This is literally one of the best KZhead channels for BMW enthusiasts. One video and I'm hooked. Thank you sir. Keep it pushing.
Great video! Very well explained.
You sir are quite literally my favorite channel to watch on KZhead. My god damn hero as far as my car is concerned. Quite frankly you have not only aided in the improvement of my car, but, the preventing of necessary maintenance to it. Thank you!
Another great video full of useful information! Great to watch content from someone so local too. I might add that I get a lot of my parts from clickable automotive who are in Australia and specialise in oem bmw parts!!!
Thanks you so much man I definitely need to do this to my e46 soon 🤙🏽❤️❤️❤️❤️
Thank you soo much great detail and very good explanation! I’m very grateful!
Thank you so much. Great lesson
Any updates on the VF Engineering rig? Would love to see a “final impressions”. Here in the US I can find a 330 salvage with some ease, so i might just swap my 325i for that to start. Interested to see how you feel. Like you said on your maintenance videos and you “do not mod”…This is a long term car for me. Love the E46 family and the problem solving/platform benefits.
Best explanation ever
love your e46! what wheels do you run?
Ur hands are gnarly mate. Throw a shrimp on the barbie. Good work matey
Thanks for the video
Thank you🙏🙏 here on 05/01/2024 and your videos are sooo much apreciated.
I get the bank 1/2 running lean code occasionally and mpg has been bad (200k mile E46). Haven’t noticed strong rattling noise but now that I watch this I’m convinced it’s DISA? Would you recommend just replacing entire thing or try rebuild kit knowing mileage (note I bought this from a friend for my sons first car so don’t know when he replaced it but I’m betting not since 100k). Great videos!!
Great advice great illustration.
Thank you! Cheers!
this video kept me from going with the m50 intake manifold swap
Thank you!!
Great info . I have a 525i n52b25 ,if noticed big diffrences in preassure when opening oil filler cap Plastic valve cover . Will this be a warning my disa needs either a kit or a new on .
Dude, I’ve been looking (over the last 9 months) for an expert explanation of the disa. My e46 was gutless at low and high rpm. Otherwise in ran beautifully. No rattling. I suspected the Disa. I bought a repair kit. Thanks for this detailed vid! 👍
How did you go? Did it fix the issue?
Thank you!!!!
Is there an aftermarket brand Disa valve that is worth buying or is it one of those things that need to be OE ?
I have a 04 330ci I have replaced the DISA 😂valve twice. Looks like I'm doing it again. I have a rattle. I've replaced disa 2x, MAF2x, purge, gas cap air idle control valve, plugs, coils, and fuel injectors. It's starts rough and only stays running if spray starting fluid in maf. When I stop it quits running. When I unplug the maf I have no throttle. But runs decent. I have a slew of codes that's why I've replaced what I have. I haven't disconnected the battery yet to reset the codes. Any ideas? Please help. I'm beginning to see a bong fire.
Thanks
MR.... I LIKE YOUR STYLE
Great explanation. I bought a disa valve upgrade kit from x8r..they told me to not take the o ring off but place the one supplied on.
Thanks for the info
I've just now put anX8R kit in my 530 with the thinner black O ring going at the base of the Disa as their video showed. Perfect with a strong induction sound from the Mishimoto intake boot.
Thanks for your reply and help,I still haven't done mine yet but will do soon👍
so my disa seems in good shape expect it doesn't move or close when i close it and put my thumb over the little hole and the flap just opens freely it doesn't hold like in other videos i apply +12/- on the terminal and it only makes clicking sound once doesn't move or close. should i replace the whole unit? i get very rought idle and lack of power.
Great video!!!👍🏼 I have been watching the channel for a while now and been doing the mods which you have recommended except the supercharger :p, although, i have been getting good performance, fuel economy has been killing me. Can you suggest some ways to increase the fuel economy of an m54 engine??
Okay, great suggestion. I'll look into it.🙄
@@Sixty4motorsport Thank you!! Looking forward to it:)
Been a while mate, hope you're doing alright!
I wish you went over the diaphragm membrane in the vacuum pot. You can test it by covering the little hole on the side and seeing if the flap stays in position when it's closed (or open??) Removing the cover is a pain in the ass and cost me at least 3 hours of my time, but it is serviceable with a 15 dollar part
Another great vid Michael!!!👍 Maybe you should start wearing some gloves to help protect those digits!✋🤚
I've noticed these injuries come in lots of 3's. wonder what the next one is?😁
I have an important question how do i change my ccv valve to custom or make it like m50 engine had so much less problems with this setting ?? My english sucks i know
I went ahead and modified my Disa valve 😊😊😊
Hello I have an important question, if the disa valve is not plugg in can it make your car misfire?? Urgent answer please
Note that the DISA O-ring is a very common gasket for vacuum leaks!
6:50 that part is sucking in air crazy into my DISA valve
I got a 2002 bmw e46 coupe Had the coq light come on Car was struggling to catch speed on take off but then regains it after time But now it doesn’t move forward Got rid of the coq light but car won’t still move forward got codes P1512 P0102 P0721 what could this be ? Help would be appreciated
I was always taught that if you bleed on a job it's a job well done ;) .... badass :)
mine ist making noise but its throwing the code for bank 1 and bank 2 running lean and mpg its good at all
My fail at the diagram air was leaking it made a needed noise replaced it working great
Thanks for sharing
That's it!! We have found Geddy Lee's brother!!
@Sixty4motorsport Hi Michael, I have a problem with my steptronic not going into sports/manual mode. When it's in P I have to wiggle it to the left a little to get it into D and from there I cant push it left to get it into S/M1. Could you suggest a fix or how I can diagnose the problem? I'm not very techical when it comes to cars but I dont mind getting my hands dirty if I have to. Thanks!
Modern auto trans can be a minefield. So many variables. Initially sounds like an issue with your shifter (you shouldn't have to 'wiggle things' to get them to work properly). But - it could also be an electronic problem. Investigate further around the shifter and inspect as many of the mechanisms that you can see to look for worn or loose bits. Also get it up on jack stands and further investigate under the car. If nothings obvious you will probably have to take it to a specialist.
Dude, I’ve been looking (over the last 9 months) for an expert explanation of the disa. My e46 was gutless at low and high rpm. Otherwise it runs beautifully. No rattling. I suspected the Disa. I bought a repair kit. $49. USD but have not yet installed it. Do you you think I should replace the whole Disa instead or try the kit? Thanks for this excellent detailed vid! 👍
hey ,what happened did you repair it or bought a new one ?
I did repair it. Didn’t solve my limp mode. My grandson inherited it. Took it to a BMW specialist shop and they could figure it out. He eventually had someone repair it but codes are still there. Waiting to get the details from him. Cheers!
@@aubreyj.tennant1123 thank you
I’m going to be replacing my disa very soon I’ll come back with an update about it hopefully the rattling in the disa area stops
unplug it first to see if rattle stops that tells you disa is bad
Funny mine broke recently and I had to get that fixed
Great timing, right!😁
The DISA valve was the main reason I reverted my M50 manifold back to stock (B30). Lost low end torque with the M50 mani but gained high end. Not that good for a daily driver IMO.
Interesting!🙄
Show! DISA improves torque at low and medium revs, favoring performance and economy. Use the aluminum replacement kit and you'll escape the death pin. Success!
Thanks for the info!
Frank!!!!!!!!! (Shameless)
A piece of plastic fell off my disa into the manifold. I guess all I can do is hope that piece of plastic made it all the way through? Haha :( Was running on 4 cylinders and without MAF plugged in it only misfires over 30% load. Gonna hope the square cm of plastic missing from my old disa is the culprit of my vacuum leak (hoses look fine, upper intake boot is fine and I'm pretty sure lower also (kinda scared to take it off since putting the hose clamps back on and tightening is gonna be a bitch) besides when I taped everything up and blew as hard as I could, it seemed like everything was 100% sealed (slight slight leak out of my tape haha)
Ur hella smart
I had a P1074 (p1071 is typically for 4-cyl engines and P1074 is for i6 or V-shaped engines) code on my scan tool, needless to say a 11 euro lower intake boot turned into a 300 euro repair (I had to replace my mass airflow censor), it was not that expensive of a repair but at least I no longer have a vakuum leak.
Your maf cashed a vacuum leak?
@@sksuppressor756 No the MAF sensor went out and the vacuum leak of the lower intake boot is what tripped the check engine light and gave me the P1074 code.
oh man, thanks for that explanation. Ive often wondered what the disa does. a friend of mine here in japan, had his disa fail and the parts went inside the engine, causing catastrophic failure. is that rare? i have a 2000 320 with only 50k miles on the clock (84k kilometers). Should I just go ahead and changed the Disa? I just replaced the throttle body, ICV and MAF sensor. One more question: Im beginning to smell some gas in the engine compartment. The odor makes its way into the cabin when the fan is on, but it goes away as I drive and returns after I switch off the engine. Im thinking the culprit may be leaky injector seals? Am I on to something?
Possibly, but my guess is your purge valve may be bad snd not opening when it should
@@chadriddle3517 Big thanks. Is the purge valve different from the schraeder valve?
Alright, did some research. if the purge valve were bad, would I not get a check engine light? The car runs perfectly otherwise.
@@chadriddle3517 you know, you were right. I replaced all the injectors with brand new ones, but the smell is still there. took to the bmw dealer here in kobe and they said its the purge valve. Ouch! 100,000 yen in new injectors, down the toilet. Not to mention the time. Took me damn near the whole day.
@@blackpassenger wow , man I hate to hear that about the injectors . Yea those purge solenoids can be pesky to trouble shoot if you don’t know about them . Glad you got it fixed !!
I have an issue with my 2001 e46 325ci... when I start the car any the engine is cold, it shakes, sounds like it wants to shut off but, after several seconds, it all smooths out and idles great. Also, from 0-60 it feels sluggish but from 60 on, it feels good. What do you think?
i got the same problem 😭🤝 also a loud whistle here n there
you possibly have a slow/failing leak in your ccv system. namely by your specific problem, its probably your bottom ccv reservoir hose that goes from your reservoir to your dip stick tube. might wanna start checking around in those areas. before its gets worse and unintentionally expensive.
@@Cavinxo any answer for your issue
Hi my E38 728I is making such a screeming noise from this box at 189,000 miles its screeching loud now i know im going to ghange the hole unit 2 x tork screws is easier X8R company is near me so ill just buy the full unit £55 , deliverd .
Have you got the e46 running with the vf super charger
Sadly not yet....soooon hopefully!
I replaced my disa valve about 10k miles ago and it failed again maybe I bought a cheap brand ?
The DISA does not end with the M54 and E46, its in the N52 and N53 engines as well, with the similar problems! Only on the later engines it seems that replacing them is alot more complex...
Yeah for me it was unplug, unscrew 2 hex, pull out, put new one in, screw in 2 hex, plug new one in. Haha
I just wanna add something: my DISA was rattling cause it was old, but when I replaced it the new one rattled as well. Turns out it was bad engine mounts and intake side was sagging and when replaced those mounts all noise and vibration disappeared.
Often the case. Think you've got the problem sorted but.... At least you don't have a rattle anymore!👍
Replacing engine mounts is not a minor job. Would of preferred disa valve.
Replacing the engine and transmission mounts is the best piece of maintenance I've done on my E46, the car now has zero vibration and feels like a new car.
@@chrislim7976 it's easy af what are you mumbelin about
Funny how he said my disa valve was rattling but it wasnt even the disa valve rattling so then why would you even say it was rattling it wasnt you just THOUGHT it was
I guess I need two or three because I think mine is original to the car and I have about 283,000 miles (453,00km+) lol
Right… 70-100k… mine has done 400k, maybe that’s why it’s rattling
think Im starting to hear my disa rattle now at 89k kilometers
upgraded mine to an ally flap , cant say i noticed any difference ,
Yeah it's one of those upgrades that no one sees and you don't notice any difference when driving, but .....
Only difference it makes is it prevents catastrophic engine failure when the pin falls into a cylinder
I hope you are okay. AU is fucked right now