X5 3.0 secondary air injection WTH! NOW W PICS

[g300d]

So I have an OBD secondary air injection code that was reset but reappeared.

First thing I checked was the pump. From a cold start it went on and blew hard.

Next I look at the valve. It wasnt open.

I looked for the vacuum line to open it but there wasnt one, nor any trace of one.

Realoem clearly shows a vacuum line goin to the valve.

What gives??!

EDIT: Here is the realoem diagram for the secondary air inj system. Note item 1, the valve, and item 3-4, vacuum lines attaching to a fitting on valve housing.



Here is the valve on my motor. Notice the lack of a vacuum fitting for the vacuum hose to attach to:



The valve is closed on cold start, it should be open. It should be actuated by vacuum but there is no place on my valve for a vacuum line to hook up to. No trace of any vacuum line or remnants thereof by the side of the valve cover.

According to realoem my valve's part number is 11727540471. Google shows pics of this and they all have a barbed fotting for a vacuum line which mine does not have.

[luvmy03E53]

That vacuum line comes from a valve on the back side of the intake manifold. The rubber hose and hard plastic line that make up that vacuum line are notorious for becoming brittle and disintegrating. The line should run from the valve near the pump, down the exhaust side of the head, around the back of the head to an electric valve mounted on the back of the intake manifold. You should be able to find some remains of the line if you look along that route. Of course you'll need to remove the plastic engine cover to get a better look. I'd post pics of this if I could, but I'm on my iPhone at the moment. Good luck!



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[g300d]

The problem is my valve does not have any sign of a vacuum fitting to fit a vacuum line on!

I was trying to find the vacuum fitting on the valve where I can hook up a vacuum pump to try to actuate the valve...there doesnt seem to be one.

Very bad internet connection, will post up the pics later.

[g300d]

Pics up

[dkl]

My '04, 3.0i looked exactly like yours...no vacuum line (items 3 & 4). Your valve is not connected to the air pump?

Where did you pull that picture from? My RealOEM search showed this, which doesn't have any vacuum line attached to the valve:

[ArmyX5]

BMW redesigned this part after 01/04. The new part number for X5 after Jan.04 is 11727553067. No vacuum line, only the Air pump hose. I had to replace mine twice because it will get exhaust residue and get stuck.

PS. Also, check the secondary Mass air flow sensor. It will go back and give you the same code.

[g300d]

Dkl, I got the diagram from realoem as per my vin. The pic of valve is from google, I googled the valve part number that came up on realoem. I have an 04 same as you, I wonder why the older system diagram showed?

Your diagram looks more like it though, thanks for posting that up!

Hose was disconnected as I was testing pump operation at the time.

ArmyX5, thanks for the clarification!

The diys for the earlier system say the valve should be open at cold start, I presume with this system it should be open as well? Mine was closed.

Which is the secondary mass air flow sensor and how can you function check it?

This newer system looks to work a bit differently from the older one, the diy's online are for the older system so I cant quite translate it to this system. For example, I cant see how the valve opens or closes now.

Hoping someone can give a basic overview of how this system works and maybe some troubleshooting tips too?

[lhordmclain]

Correct me if I am wrong .. These are all emission related parts that does not affect the engine performance ( only for low emission and state inspection )

And I agree with you dkl, the diagram looks the same for my 04 e53 3.0l

I just experienced a SES related to part #8 secondary MAF (VDO Siemens ) and part #14 EGR valve

I was contemplating on replacing the filter as well. But since the SES light did not appear/pop-up again since I cleared it..... I dropped this project



To the op, please double check with real eom again with your vin since your have e53 3.0i like us.

Originally Posted by dkl

My '04, 3.0i looked exactly like yours...no vacuum line (items 3 & 4). Your valve is not connected to the air pump?

Where did you pull that picture from? My RealOEM search showed this, which doesn't have any vacuum line attached to the valve:

[g300d]

Lhordmclain, realoem gives me the old system diagram when I input my vin. Thanks to dkl and ArmyX5 I see my system is the redesigned system and realoem gave me the wrong diagram, causing my confusion.

Now I'm trying to get info on how this later system works so I can troubleshoot it.

[lhordmclain]

What is the build date of your vehicle ...
Army x5 says it was redesigned on 01/04 and on wards
My x build date was 06/04