No:damn:as a 4.4i owner, we do not use this part, instead our part designed on different way and location: look @ the 1st graphic image below and refer to #2 which is valve cover also known as rear cover or intake manifold cover. This is another common location to have a vacuum leak, gasket front#11 and rear cover gasket#10 and gasket#14 which located under the intake manifold, and I bet you dont :tsk:wanna mess with that. Otherwise the Disa valve that you required information above is for the BMW X5 3.0i

Yeap, I know that... A PCV Valve its called as I know. Thanks

Ok, update. Car seems to run fine but Service Engine Light back on. No one answered me on the proper tension on the flap, is there tension or not? Did my part "look" fine in the pics? I'd hate to buy a $200+ plus part when it may not be the issue.

Anyone?

:bow:ok I can truly understand your frustation there because no one wants to spend on something that you're not certainly sure whether if this going to resolve your issue. Honestly for your disa valve, it appears to be great looking to reuse; but the (red gasket part maybe slightly out of range). And this is mostly the part that actually blocked the compression from coming out on the disa valve. And sometime the leak could be so small, anywhere but you can't even see it N'less perform a smoke test on the car.

I wouldn't require you to buy a new disa valve neither, as vacuum leak may have caused by different other locations. But once again: Disa valve failure, cracked in the elbow, intake manifold gasket, Oil separator hoses, mass airflow sensor are the most common cause for a vacuum leak on these cars. For this reason, I recommend you just like I did to perform a smoke test where you can see right-away whether if you have a vacuum leak or not, and where exactly the smoke is coming from.

Great idea. Who did a smoke test for you? Of did you do this yourself?

How is a Smoke Test done?

:(I don't know how much money they will do it for you around where you live, because some places required different amount than other as you know. But this test goes from: $75 to $100/change depend which mechanic shop you go to.
Amazingly! I found a mechanic place less than 1 mile from my house in NY who perform the test on my car and they only charged me: $60 dollars cash. I was so happy to find the result right-away for that little change, while most places wants: $100 for the same test.

Note:trustme: most garages dont know about this special test, because they dont do it as often. (It's a very simple test that we all could have done on our cars) But due to the cost of :doh: this machine:$700 to $2000, only mechanic shop may have that. The test is consisted as follow: Look for any vacuum tube line that goes to the intake manifold, disconnect the other part and hook-up the tube line that come from the machine smoke to it, because you're going to inject smoke into the intake manifold. witting a few second, you will see smoke is coming out right-away where the leak occur and you've found your problem:D

Note:If there's no smoke coming out, than you need to seat on your coutch:drinking: and start thinking about your next pay check to buy a New mass airflow sensor. But most likely 97% they will find a leak on your car. And tell them that you dont need any diagnostic, because they may try to foul you. Once you already acknowledge of your problem, just explain them the process of the test, how is it done, the codes that were pulled-up because some of them might not even knowledge of a smoke test on a vehicle. Just try to be a mechanic guy so they won't kill your pocket.

This is a great thread and it will help many E53 owners ...

Here are some pics of the 4.4 engine with the rear cover of the intake...

I have same codes going to check this.stuff.tommarow so get ready for ... where is... how do I.. are u sure ... questions lol

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I truly appreciated those intake rear pictures cover, even I've already been there and knowledge exactly what connected through there, but this pictures will help alot of other great folks here. Well by the way...as I can remark, the entire engine seems to be disassembly or on the ground in order to take those great pictures like that. Cause I know how tight it is back there.:thumbup:

Let's keep our
baby clean and runs smoothly!
(01 X5 4.4i)

My #2 seems good and not crack or broken (this is an $90 part) I will keep it . My oil separator seems ok also. I clean them with de-greaser several times and rinse them both water was coming out light brown as expected and now they are all clean. However I will change the #10 gasket and #11 gasket. I also had hoses that goes to #2 broken all ripped apart and off the connections. Therefore will change all hoses in the back (I believe this was my vacuum leak and therefore my check engine light on)