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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-02-2011, 11:09 PM
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gibo58 gibo58 is offline
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help identifying hose

I was eyeballing the disa today just to have a look and noticed a hose near the rear of it that looked like is was quite flat. I had a bit of a feel and the hose in question is quite hard and probably brittle to boot. I had a look at realoem but couldn't seem to find it other than it is connected to a "sucking jet pump". From there it goes to the firewall.
Anyone know what this hose is called and where to find it at realoem? (vin: CK18463)
Cheers

You can sort of see the hose flatening out as it goes from the 'sucking jet pump'



Last edited by gibo58; 11-02-2011 at 11:12 PM.
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  #2  
Old 11-02-2011, 11:34 PM
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bmw330pp bmw330pp is offline
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Just replaced mine 3 hours ago. Its a vacuum hose for your brakes. Since you have an e39, its slightly different than mine. I'm pretty sure it's the thing. It goes into your master your cylinder in your firewall.
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  #3  
Old 11-02-2011, 11:36 PM
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gibo58 gibo58 is offline
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Vacuum hose

Sorry people, forgot to 'search' first, just saw Blubee's thread on the sucking jet pump.
Mine seems different as it goes to the firewall not to the brake booster. Would the hose be one of these:
http://www.realoem.com/bmw/showparts...29&hg=34&fg=27
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Old 11-03-2011, 07:17 AM
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Quote:
Originally Posted by gibo58 View Post
just saw Blubee's thread on the sucking jet pump
My ears were ringing!

Quote:
Originally Posted by gibo58 View Post
Mine seems different as it goes to the firewall not to the brake booster.
Are you really sure that the top hose of your SJP doesn't go to the brake booster?

I'm new to the SJP, but, with the little I know, I can't imagine that being the case. Are you following the right hose? Are you sure what you're calling the 'firewall' isn't just the bottom or side of the cabin air filter housing?

PS: Great pictures, BTW. It's hard to get a closeup of the SJP in situ (ask me how I know).

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Old 11-03-2011, 07:25 AM
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bluebee bluebee is offline
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In shrinking your pictures for better viewing, I noticed that there is a vacuum endcap on one of your hoses.

To my knowledge, I don't have that vacuum endcap.

If that's a SJP hose, and if it has an endcap, what would the purpose be of a vacuum port be at that location?

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Last edited by bluebee; 11-03-2011 at 07:27 AM.
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  #6  
Old 11-03-2011, 07:37 AM
Steve530 Steve530 is offline
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Looks like his brake servo is on the wrong side of the car , requiring an extra length of hose. Apparently the connector for the hoses had an extra fitting, so they capped it.

BTW, that hose should be hard, but not brittle.
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Last edited by Steve530; 11-03-2011 at 08:30 AM.
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  #7  
Old 11-03-2011, 09:20 AM
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Quote:
Originally Posted by Steve530 View Post
requiring an extra length of hose.
Oh. I think I see. Is it that the RHD cars have a two-piece suction-jet-pump upper hose to the brake booster while the LHD cars have only one piece?

Quote:
Originally Posted by Steve530 View Post
Apparently the connector for the hoses had an extra fitting, so they capped it
Comparing the OP's diagram to mine, I see yet another hose apparently in place of what is capped in the OP's picture:

- E39 530i Brakes => Brake servo unit => Power brake unit depression


Here is my 2002 525i diagram (notice no second hose):
E39 525i Brakes => Brake servo unit => Power brake unit depression
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  #8  
Old 11-08-2011, 04:24 PM
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bluebee bluebee is offline
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Steve530 kindly pointed out (see red below) that in the OP's diagram, there actually 'is' a vacuum port on the firewall connection, even though it's apparently not called out in the numbered parts list:
- How does the BMW E39 sucking jet pump (aka suction jet pump) work & how does it fail?

Quote:
Originally Posted by Steve530 View Post
Looks like they missed that piece. But the connector is shown with a vacuum port.

To the OP:

Does the assumption that RHD cars have a longer distance to go (hence the additional hose) make sense to you?

Is that what you are seeing?
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  #9  
Old 11-09-2011, 12:06 AM
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gibo58 gibo58 is offline
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Sjp

Hi blubee, I think youself and Steve530 are right on the money. Besides the obvious differences between RHD and LHD cars there are also subtle differences.

I intially was concerned due to the 'sucked in' nature of the hose, it just didn't look right.


Cheers
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