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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-18-2016, 11:34 AM   #1
Fonzienatic
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No start - fuel pump how to

Hello folks!

This is my first post at the forum but I love what you have done here. So much valuable information.
My wife's 03 BMW 325i didn't start anymore and since I was on a business trip she had it towed to a repair shop. They told her the fuel pump was bad and wanted to charger her $650.
I looked on this forum and decided to do it myself even though I have never done it before but seems pretty straight forward.
Now, I keep reading stuff about fuel pump AND filter as well as relay. What do I have to replace and where is the filter and relay in case I have to replace it? Do both have to be replaced in case of a fuel pump replacemsnt?

Also, where should I get the part and from what brand. I saw one on A,Avon for $149 from Bosch. I'm just wondering if that is the complete pump as I have heard you can also rebuild the old one. What should I do in respect to that?

Can you give me any tips or tell me a good DIY guide for replacing the thing?

Thanks for your help it is much appreciated!

Nick

Last edited by Fonzienatic; 12-18-2016 at 11:39 AM.
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Old 12-18-2016, 11:41 AM   #2
jfoj
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Read my comments here - http://forum.e46fanatics.com/showthr...825&highlight=

As for parts, highly suggest a Siemens/VDO pump and sending unit assembly. You will also need 1 small worm drive hose clamp.

www.bmaparts.com or you could use www.realoem.com to verify the proper part number and often BMAParts sells through Amazon as well, but be VERY careful to only buy via BMAParts on Amazon.

BMAParts usually drop ships from the closest warehouse, usually 2 days standard shipping.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 12-18-2016, 12:09 PM   #3
OnTheFence
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Fonz, It's great you're willing to try this yourself.
Leave the fuel filter for another time, it's very unlikely that is causing a no start.

Here are some tips and pics.
http://forum.e46fanatics.com/showpos...4&postcount=33
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Old 12-19-2016, 09:32 AM   #4
markusmarkus
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The relay is located above the fuse panel in the glovebox. Buy a new relay and keep it in the glove box - Judy in case. Changing the filter is optional. When you decide to do so you should also replace the 3 short (3" each) sections of fuel hose and the 6 clamps. Your car is 14 years old and those hoses and clamps have seen better days.


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Old 12-19-2016, 10:33 AM   #5
CylonRed
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BavAuto has a god video on replacing the fuel pump/filter (youtube has quite a few videos as well).
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Old 12-19-2016, 10:48 AM   #6
BaliDawg
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Quote:
Originally Posted by markusmarkus View Post
The relay is located above the fuse panel in the glovebox. Buy a new relay and keep it in the glove box
FYI: you've already got some spare relays in there via the AC compressor relay, rear window defroster relay, horn relay; same part.
Part number: 61368373700
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Old 12-19-2016, 03:35 PM   #7
Fonzienatic
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Thank you so much for your help! It is much appreciated!

I will do the fuel pump first and then see how she runs. The filter I will tackle a bit later.
One quick question, in the instructions I read through I didn't see where the worm drive hose clamp comes into play for the fuel pump?
All your tips are very much appreciated and it's nice to be welcomed here in this fashion!
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Old 12-19-2016, 03:52 PM   #8
CylonRed
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Quote:
Originally Posted by Fonzienatic View Post
Thank you so much for your help! It is much appreciated!

I will do the fuel pump first and then see how she runs. The filter I will tackle a bit later.
One quick question, in the instructions I read through I didn't see where the worm drive hose clamp comes into play for the fuel pump?
All your tips are very much appreciated and it's nice to be welcomed here in this fashion!
The original clamp for the fuel line is not a worm type. The worm type just replaces the original clamp. Original means from the factory.

Last edited by CylonRed; 12-19-2016 at 03:53 PM.
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Old 12-19-2016, 05:37 PM   #9
DEADF15H
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Quote:
Originally Posted by CylonRed View Post
The original clamp for the fuel line is not a worm type. The worm type just replaces the original clamp. Original means from the factory.
You would need a special tool for the original BMW clamp, so most of us change it to a generic worm type.
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Old 12-19-2016, 07:01 PM   #10
OnTheFence
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Just cut off the 1 time use clamp on the car. Flush cutters
Replace it with a worm drive clamp.
Get a little assortment if you can't find the right size to buy.
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Old 12-19-2016, 07:03 PM   #11
jfoj
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The smallest worm drive hose clamps works, its 3/8" fuel line.
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 01-21-2017, 08:23 PM   #12
Fonzienatic
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Questions/issues and P0171 - P0174

Hello team!

First of I'd like to say a huge thank you to all tips and information on here. Went ahead and replaced the malfunctioning pump with the Siemens/VDO pump today. Now here are some questions and issues I am concerned about.

1) I followed instructions closesly. How do I know I seated the pump correctly? When installing, I made sure to "tug" the rubber seal in first before pushing down the pump into its socket all together.
However, after putting everything back and screwing on the top I took it for a test drive without the seat cover back on. And I cold hear rumbling notices from back there. Now, maybe that is the sound of the pump and it will be dampened once the seat cushion is back over it? Or did I do something wrong and it's maybe not seated correctly or all the way down? Or is a little noise coming from back there normal without the seat cushions back?

2) The initial issue was that my wife called me and told me the car wouldn't start and that she used my OBD reader to get codes P0171 and P0174 (mind you I was on a work trip). She ended up getting the car towed to the local repair show who diagnosed and said it would need a fuel pump.
I told her I'd be able to do it myself and to get the car towed home again.
Now, after putting the fuel pump in the "service engine soon" light is still there and we are looking at the same codes.
I thought the codes were connected since they weren't there before the car wouldn't start due to the fuel pump. Long story short, are those codes totally unrelated to the fuel pump or why aren't they going away? And what should I take a look at now?

The car runs fine now. No more problems getting it started so I am sure the fuel pump was in fact bad. But it upsets me those codes are still there. What do you guys think?

I owe you guys. You have been so helpful. Hanks for all you do and all your great help!

Nick
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Old 01-21-2017, 08:59 PM   #13
cvx5832
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Clear the codes and see if it comes back
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Old 01-21-2017, 10:14 PM   #14
jfoj
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P0171/P0174 are STANDARD features for a 10+ year old BMW.

Do not take this the wrong way, but the car has probably not been maintained like it should, meaning PM for things like the fuel pump, filter, CCV and hoses, intake boots, DISA. These are all wear items.

Suggest you clear codes, if the OBDII supports Live Data, get warm idle Fuel Trim values and post them. If the light comes back, get codes and post Freeze Frame info. If your tool dues not support Live Data and Freeze Frame, you need to get the OBDFusion App and VeePeak interface from Amazon both for under $30.
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 01-22-2017, 02:18 PM   #15
Fonzienatic
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Thanks for all your support. Unfortunately I don't have an OBDII reader that supports those functions but I'll get the amazon connector plus app. I do have the torque app and an OBDII Bluetooth connector, not sure if that would do the trick or if I just need the app you guys mentioed.

We bought the car about 3 years ago and it was really well kept. Only one owner, garage kept looked immaculate inside and out and had all the services done at BMW dealership. I was impressed. They kept doing the big and the small service in the recommended service intervalls. On my Mercedes they are called a and b service intervalls.
I will have to look through the info I have to see if those particular item as you mentioned had been replaced ever.

Thanks for all the info. Helps a lot. I will keep investogating.
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Old 01-22-2017, 05:11 PM   #16
jfoj
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Torque will work OK, however, suggest you buy the OBDFusion App for $3.99 and it will work with the interface you use for Torque.

Then you can read the PDF in this thread to get an idea how to set up the App and send Log and other data - http://forum.e46fanatics.com/showthread.php?t=1097893
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 01-22-2017, 05:17 PM   #17
Overboost
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Quote:
Thanks for all your support. Unfortunately I don't have an OBDII reader that supports those functions but I'll get the amazon connector plus app. I do have the torque app and an OBDII Bluetooth connector, not sure if that would do the trick or if I just need the app you guys mentioed.

We bought the car about 3 years ago and it was really well kept. Only one owner, garage kept looked immaculate inside and out and had all the services done at BMW dealership. I was impressed. They kept doing the big and the small service in the recommended service intervalls. On my Mercedes they are called a and b service intervalls.
I will have to look through the info I have to see if those particular item as you mentioned had been replaced ever.

Thanks for all the info. Helps a lot. I will keep investogating.
$3.99 and you have the best OBDII tool in less than 2 minutes. As jfoj said, your current ELM 327 bluetooth adapter will work fine.
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