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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 01-19-2013, 02:23 PM
KyleEvolv KyleEvolv is offline
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Location: Tucson, Arizona
 
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Mein Auto: Silver 1999 323i
99 323i Fuel leak

Hey guys I haven't been able to get onto the fourm as much as I would like but I have a safety issue going on. Underneath my rear driver side seat there is fuel pooling under the metal plate that is held down by four screws. I only noticed this because I filled up my fuel tank completely and now fuel is leaking from there to the ground. I'll try to get a picture up quickly.


Thank you
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Last edited by KyleEvolv; 01-19-2013 at 02:32 PM.
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Old 01-19-2013, 03:04 PM
KyleEvolv KyleEvolv is offline
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Mein Auto: Silver 1999 323i
I've noticed that the part that is leaking is the line that sends fuel to the other pump. I don't know what exactly this is called or the part number. Though I assume that a new one (line) can be fished though to the other side and installed quite easily. Does anyone have any idea?

Thank you
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Old 01-19-2013, 03:19 PM
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stevenj stevenj is offline
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Location: Sacramento, CA
 
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Mein Auto: 1999 323i ZSP
I have the same car as you, but I don't even know what you are taking a picture of (orientation wise)

But I would assume if you have a leaking fuel line it would be a no brainer to fix it asap.

Check out this site for parts info. http://realoem.com/bmw/partgrp.do?mo...3&mospid=47718

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Old 01-19-2013, 03:33 PM
KyleEvolv KyleEvolv is offline
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Location: Tucson, Arizona
 
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Quote:
Originally Posted by stevenj View Post
I have the same car as you, but I don't even know what you are taking a picture of (orientation wise)

But I would assume if you have a leaking fuel line it would be a no brainer to fix it asap.

Check out this site for parts info. http://realoem.com/bmw/partgrp.do?mo...3&mospid=47718

GL
Yeah I was looking at some RealOEM diagrams, I know where it's leaking from but the diagram is just absurdly unclear as to what part it is. I assume that it's the fuel return line that's leaking (the line that goes from the jet pump to the electric pump) but I can't be sure.
In the picture above it looks like it's leaking from the black fuel line but I have no idea what BMW calls it...

Just fyi: the picture is of the top of the jet fuel pump on the driver's side of the vehicle.




Thank you for your input

Last edited by KyleEvolv; 01-19-2013 at 03:35 PM.
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  #5  
Old 01-23-2013, 06:31 AM
KyleEvolv KyleEvolv is offline
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Location: Tucson, Arizona
 
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Ha well... That was interesting. I've never had that happen on a forum before. Anyway I needed to replace the fuel line that was going from the secondary pump to the primary one. So if anyone is having this fuel issue, and I hope it's rare, that could be one of the few solutions. You may need to replace the secondary pump.
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Old 01-24-2013, 06:00 AM
GoForthFast GoForthFast is offline
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There is no secondary pump. The driver's side unit is a fuel level sender only.
It does intergrate with the sucking jet pump which is a purely passive device. The only part in the sucking jet pump that can easily fail is the check valve. That is so rare that I have never seen it on a forum. My BMW dealer said he has seen it tho.
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