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  #11  
Old 12-17-2017, 11:42 PM
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My Mileage? 135,000-ish. Under 8,000 per year. I bought the car with 118,000, three years ago.
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  #12  
Old 12-17-2017, 11:46 PM
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Quote:
Originally Posted by jdstrickland View Post
My Mileage? 135,000-ish. Under 8,000 per year. I bought the car with 118,000, three years ago.
Thanks. Seems about right - as in it fits with other folk who have had similar SFPDS (sudden fuel pump death syndrome).

And that's about my mileage too (currently at 132,000m) - but I'm hoping the higher lubricity of diesel fuel means that us oil burners see more service from the fuel pumps. I guess time will tell....
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  #13  
Old 12-18-2017, 12:19 AM
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^BMW pumps have a potential failure of the pump after 100,000. Pretty much regardless of chassis. The few pumps I have had to replace have been 120,000 and 150,000.

Being a fellow diesel X5 (e70) owner... I am willing to buy into your premise the oily stuff will help our pumps last longer.
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  #14  
Old 01-16-2020, 10:12 AM
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Don't want to start a new thread so apologize in reviving an old one. Just want to have folks here to consider getting genuine BMW part if budget allows it.

The original pump went out (@173K) so I replaced it with Delphi one. It says Delphi is OEM but unfortunately, mine only lasted 39K miles (@212K). Car broke down and have it towed back to my house.

Few things to add
  1. Never had the gas tank below 1/4
  2. traveled 90 miles to/from work (all highways)
  3. replaced fuel filter with Delphi fuel pump
  4. got 54psi pressure on the rail
Overall, my experienced with aftermarket parts were pretty good but learned my lesson when it comes to parts that will leave me stranded on the side of the road. Mind you that this fuel pump problem abruptly happened with no warning . . . car stuttered, pull up to side of the road, car died and would not start.

I should be getting the new Genuine BMW part sometime next week. Got the new pump from the company that provides the lifetime warranty.

This is just my experience with Delphi. Others might have better luck but with the amount of miles I do, maybe fuel pump is not up to the task.

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  #15  
Old 01-16-2020, 11:41 AM
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“Never lower than 1/4 tank” is not a good thing. You have to occasionally go lower to confirm your siphon jets are functioning and there is zero benefit to the electric pump. Once you are below about 1/3 or 3/8 of a tank there will only be about 5l of fuel in the right side of the tank.

I bought a knock off pump that only lasted 10 months but since it was warranted I replaced with the same and it’s been working ever since. I thought the pump died so I bought a Bosch and discovered it was the fuel level sensor that was whacked and just fixed that (wrote a DIY).

While you have the back seat off, check your siphon jet o-ring since they tend to fail about 140,000 miles
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  #16  
Old 01-16-2020, 01:01 PM
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Thanks andrewwynn for your input.

I included the 1/4 tank statement to convey to everyone that lack of fuel level did not contribute to premature failure of the pump.

Its confirmed pump is bad since I have it out and applied 12V directly on the +/- terminals . . . nothing.

I do check the OBC cluster for fuel on both sides of the tank. So far, siphon jets seem to be working.

About the O-Ring, is that the one around the opening? Is it the same size as the O-ring on the pump itself? If it is the case, the new pump comes with O-ring. I will use the "newish" o-ring from the failed Delphi pump.

Last edited by chedeng; 01-16-2020 at 01:16 PM.
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  #17  
Old 01-16-2020, 02:12 PM
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I’ve only ever reused the main tank seal. Put it into the tank first before reinstalling pump.
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  #18  
Old 01-16-2020, 08:09 PM
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Quote:
Originally Posted by jdstrickland View Post
You guys waaay overthink stuff. It's a simple DC motor, the windings are open. Using what I know to be true on the E46 and E36, I took the back seat out and the pump was right where I thought it would be. I hesitate to make a spark because I filled the tank less than 30 miles ago. They had a pump in stock at AutoZone for $150, no waiting. The maker is Delphi, they have been building stuff for longer than I've been alive

All is well. Started on the first try.

And, yes I checked for codes first.
3.0i/M62/N62? Just curious.
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