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Old 06-11-2014, 10:07 PM   #1
duranza
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Post Fuel Pump Replacement Guide

I do not know If there are any guides to replace just the pump on an E46, but I have made one after not finding anything about it. All I could find was just replacing the whole sending unit and pump.

I had lean codes on and off for about a 2 years with my 2004 330 CI. It has 160k miles on it. Just last week it started to idle very rough, so I went the vacuum leak route and replaced all the plastic pvc hoses, intake boots, DISA oring, cleaning the ICV and so on... well last Friday my car would start and shut off after 20 secs.. I checked the plugs and compression.. All good. So what is left? Fuel... I checked the pump and it turned on ok.. Then I checked the fuel pressure and bam.. It was shutting to 60 psi and dropping to 20 psi after 10 secs and the car dies.

New pump later, and all codes are gone. MPG is actually better than before. Maybe because it is no longer in limp mode...

I hope it serves well and helps others save some money and headaches.

Thanks,

Jonathan
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Last edited by duranza; 06-11-2014 at 10:08 PM. Reason: Tittle change
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Old 06-12-2014, 05:14 AM   #2
tommy d
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I'm curious as to what your cost was of the just replacing the pump vs the whole unit?
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Old 06-12-2014, 06:40 AM   #3
duranza
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$70 dollars vs $178. A pretty good savings I say. Besides I had used high flow fuel before on my crx and already knew it was a good pump. Can't beat lifetime warranty and free 2 day shipping.
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Old 06-12-2014, 06:59 AM   #4
Sansho
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Replacing the pump itself is a different approach. I paid $120 for a complete oem fuel pump last year, plus a new seal.
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Old 06-12-2014, 07:17 AM   #5
duranza
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Originally Posted by Sansho View Post
Replacing the pump itself is a different approach. I paid $120 for a complete oem fuel pump last year, plus a new seal.
It is.. but not any harder. It took me 45 mins to do everything. $120 for the whole unit and the seal? That's pretty good.
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Old 06-12-2014, 09:34 AM   #6
lszlszx
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Nice job with the guide!
Is the pump universal, or specifically for the E46?

Autohausaz has the whole assembly for $89, but it's the Uro brand.
This pump must be good quality.
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Old 06-12-2014, 09:55 AM   #7
addam03E46
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Originally Posted by lszlszx View Post
Autohausaz has the whole assembly for $89, but it's the Uro brand.
This pump must be good quality.
FYI that's the one i got when i did mine. I Haven't had any issues.
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Old 06-12-2014, 09:57 AM   #8
Solidjake
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Originally Posted by duranza View Post
It is.. but not any harder. It took me 45 mins to do everything. $120 for the whole unit and the seal? That's pretty good.
The DIY is out there and very detailed too. The entire assembly can be bought at bmaautoparts.com for $119 shipped after discount code spece30, but thanks for the write-up
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Old 06-12-2014, 10:18 AM   #9
lszlszx
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Originally Posted by addam03E46 View Post
FYI that's the one i got when i did mine. I Haven't had any issues.
How many miles have you driven since?
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Old 06-12-2014, 12:38 PM   #10
addam03E46
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Originally Posted by lszlszx View Post
How many miles have you driven since?
Not far enough to really test it yet to be honest, probably about 5K. But it popped right in and worked the second i hit the key.
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