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      06-09-2016, 09:18 AM   #1
mojobmw_e90
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Diy fuel filter n54

Anyone have a diy for the fuel filter assembly replacement on the drivers side? I'm approaching 100k and about 30k with e85. It's cheap insurance to replace as it costs 140 shipped from ecs . If not il make one this weekend. I have my fuel pump removed as I'm upgrading it. I know bmw says lifetime, blah blah..bmw doesnt run e85, bmw doesnt run a s2 pump, bmw doesnt upgrade to bigger fuel lines from fuel it. So that lifetime works on normal ppl cars. Thanks! Fyi this is for a 07 e90 335i



Update : diy on the fuel filter itself is actually easy. This requires you to disconnect your LPFP as you will be removing 3 hoses. 2 breather tubes and the actual feed line (brown line)

Recommend having half tank of gas or less. The less gas the less mess you will have.

1. Disconnect battery ground power, leave trunk open
2.remove rear seats. I have a e90 so comes out easy, assuming E92 is same
3.follow Steve's diy on LPFP swap, but leave the 3 small hoses unplugged
4.now on drivers side, flip cover over, remove 4 10mm bolts
5.unplug 1 harness by pressing side tabs.
6.clean this area very very well. This is post filter so any dirt that gets into the actual feed line may damage the injectors, rail, high pressure pump and so forth.
7.once cleaned use your left hand and push the feedline in, while holding it pushed in, use your right hand and pull the gray clip back away from the feedline, now hold the gray clip in the back position while pulling the feedline back and out with your left hand. Will take some practice and you will feel it release especially if it was never removed.
8.unscrew ring on the cap.
9.now slowely lift the white top hat, be careful it has a level float on it as well
10.make sure the 3 hoses that are about to come out are not connected or tangled on the passanger side LPFP.
11.now go back to drivers side, reach inside the fuel tank and slowly pull the hoses while lifting the white hat assembly. Be careful there is fuel inside the hoses and fuel filter.

That's it, reverse the installation, fuel line just connects to the nipple by pushing it straight in and will click.

As alot of people have said the fuel filter is a '' lifetime'' filter. But I was having low pressure issues at idle, not under boost, no cels, no hiccups nothing.(more on this later)

Well according to my logs with a s2 fuel pump my idle psi was at 54-55psi before the filter replace. After the filter replace it went up to 59-60psi.yes this is still low but as you can see it improved flow. Nothing else was touched or replaced.

Now Ecstuning.com has 2 part numbers. But this one is the one I got.

Mfg#: 16117163295

For 140 bucks it was worth it for me. It is preventive maintance that does not hurt and all it will do is improve flow and help keep the car running better. My logs to my tuner (Trebila) showed that there was improvement at idle and while driving. My car has 95k and was on the original filter assembly. Now as far as the low pressure issue it was a bad LPFP sensor itself. Wanted to do this before I did the sensor just to see if there would be improvements.
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Last edited by mojobmw_e90; 06-16-2016 at 08:19 PM.
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      06-10-2016, 10:15 AM   #2
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Bump,??
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      06-10-2016, 03:22 PM   #3
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Your car doesn't have a fuel filter (except for the strainer in the tank which is very pricey to replace).
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      06-10-2016, 07:35 PM   #4
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Quote:
Originally Posted by Phil325i View Post
Your car doesn't have a fuel filter (except for the strainer in the tank which is very pricey to replace).
Drivers side has a filter and assembly unit

https://www.ecstuning.com/b-genuine-bmw-parts/fuel-filter-fuel-pressure-regulator-repair-kit/16117163295/
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      06-11-2016, 04:06 AM   #5
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Quote:
Originally Posted by mojobmw_e90 View Post
Drivers side has a filter and assembly unit

https://www.ecstuning.com/b-genuine-...t/16117163295/
Yes. But located inside the fuel tank, as I said...
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      06-11-2016, 09:28 AM   #6
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Quote:
Originally Posted by Phil325i View Post
Yes. But located inside the fuel tank, as I said...
So you are saying I can't unscrew the cap on drivers side, remove old unit and put new one in?
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      06-11-2016, 11:42 AM   #7
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Quote:
Originally Posted by mojobmw_e90 View Post
So you are saying I can't unscrew the cap on drivers side, remove old unit and put new one in?
I'm sure you can. My point is this is far cry from the relatively cheap and easy to replace in-line filter of earlier BMWs...
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      06-11-2016, 04:01 PM   #8
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Quote:
Originally Posted by Phil325i View Post
I'm sure you can. My point is this is far cry from the relatively cheap and easy to replace in-line filter of earlier BMWs...
I'm sure it's easier,but for 140 bucks it's still not bad considering it might help with flow and keep high pressure pump running better
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      06-12-2016, 01:08 PM   #9
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Quote:
Originally Posted by mojobmw_e90 View Post
I'm sure it's easier,but for 140 bucks it's still not bad considering it might help with flow and keep high pressure pump running better
Take the $140 and save a little more and get LPFP upgrade /done
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      06-12-2016, 01:54 PM   #10
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Quote:
Originally Posted by Banana Clipper View Post
Take the $140 and save a little more and get LPFP upgrade /done
I have it on the way, just preventive maintance on my end that's all. Oh well il just do it and move on. Thanks for those who replied
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      06-14-2016, 10:41 PM   #11
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Went ahead and swapped it out. Easy install. Took about 1hr start to finish. New upgraded fuel pump arrives tomorrow. Reason for my change was I'm at 100k and close to 35k on e85.
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      06-15-2016, 03:04 AM   #12
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That's great, so you asked for a DIY and didn't get one and did the job anyway... are you going to write up a DIY yourself and post it here for others..? Not that I need to do this job but just in case someone else comes along looking for the same thing.
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      06-15-2016, 03:46 AM   #13
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Would also be helpful for others who may be contemplating this to know whether the old filter you removed was in any way partially blocked or contaminated...
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      06-15-2016, 07:25 AM   #14
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Il edit my first post with all the details on how to do it and where I got the parts. Will also open up the oem unit and see how the filter looks and such. At a quick glance the old units filter housing is actually darker in color than the new unit. Both housings are white with dark colored filters
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      06-16-2016, 08:12 PM   #15
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Diy has been posted. Psi has been increased at idle from a filter replacement
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