[Lexor1704]

I had my HPFP replaced for the first time on Friday and I wanted to share some information with the community. First I live in an area where I can get no ethanol added fuel and have been doing so since day 1. The dealer told me there is no coorelation with ethanol, unless you are above 10 % of course, and that the failures are caused by a poor design. They also told me that BMW gave the original manufacturer several chances to fix this design but that the 943 pump is the supposed solution as it is a new provider and a different internal design. Car drives vastly better now so who knows how long my old pump was running in a reduced fashion. I have the 943 pump and I hope it fixes the problem permanently but only time will tell. Good day to everyone.

[JulieDriving]

Interesting, thanks for the update.

[DASHOCKER]

Thanks for your feedback. Hopefully this 943 pump is the fix. I wonder if all dealers will be using the 943 pump from now on?

[Bimmerforlife]

But how do u know that you really have the 943 pump, not that I'm doubting you, just the dealer talking, can u upload your invoice receipt showing the part # and that should confirm it for us all.

[bavarian19]

hopefully good news

[nukezero]

doesn't freakin' makes sense that BMW can't get this right.

Audi uses direct injection. So does Ford with their Ecoboost V6. So does a few others.

I like to know what hpfp they use and maybe BMW can be school'd on HPFP from these guys.

I think BMW or people blaming ethanol is a joke. BMW is not the only brand using HPFP....


sit back and think about this for a while. BMW..a world renowned car maker... world class engines and handling... yet they can't get a "high pressure fuel pump" designed correctly... somehow this is harder to make correctly than a high revving V8 engine.

[Gart]

Personally never believed that ethanol was the problem in pump failures. Some last as long as yours, while others state that the pump failed as they were leaving the dealer. If ethanol was causing the failure, there would be many more stories of the instantaneous type.

I agree more with poor design. Hopefully the new one is going to put an end to this. If so, this board will lose 50% of its postings!

Good luck.

[galahad05]

[dirtbike59]

Originally Posted by nukezero

doesn't freakin' makes sense that BMW can't get this right.

Audi uses direct injection. So does Ford with their Ecoboost V6. So does a few others.

I like to know what hpfp they use and maybe BMW can be school'd on HPFP from these guys.

I think BMW or people blaming ethanol is a joke. BMW is not the only brand using HPFP....


sit back and think about this for a while. BMW..a world renowned car maker... world class engines and handling... yet they can't get a "high pressure fuel pump" designed correctly... somehow this is harder to make correctly than a high revving V8 engine.

bmw pressure goes as high as 200 bar or 2900 psi. audi is at 110 bar or about 1600 psi. ford is around 2100 psi. i wonder if they are tryign to get too much out of these pumps.

[Bimmer This]

Lets just hope that it will be your last. Good luck!

[galahad05]

That's a very good point you have there, dirtbike. I hadn't realized the huge difference in pressures between BMW's and the others' pumps. 800 psi is enormous.

[dirtbike59]

Originally Posted by TrackRat

2900 PSI is nothing however compared to Diesel common rail DI pumps running 26,000 PSI.

http://en.wikipedia.org/wiki/Common_rail

very true. however diesel fuel also lubricates much better than gas even with the ultra low sulfur diesel.

[Terrance28]

I just got my pump replaced at 40k also for the first time with the 943 pump, so hopefully I can get another 40k more miles out of it before it dies again.

[PUMPD]

Just replaced mine at 40,000 mi., invoice say's the new part number, # 943

[GregTheStig]

This is the first time I've heard about this (forum noob). I just passed 34,000 miles on mine... I'll be waiting.

[chromisdesigns]

Greg -- your sig shows you drive a 328 -- the HPFP is only a problem on the twin-turbo N54 engines in the 135,335,and 535 models.

[GregTheStig]

Originally Posted by chromisdesigns

Greg -- your sig shows you drive a 328 -- the HPFP is only a problem on the twin-turbo N54 engines in the 135,335,and 535 models.

*face palm* Got it, thanks man.

[GnokGnik]

My usually trouble-free ZSP (50% JuiceBox+ running on Chevron 91 octane) E92 335i got its first HPFP replaced @ 41k miles. I hope this one lasts as well as the last one at least.

[Lexor1704]

I do not have easy access to a scanner but the part number from the invoice is 13-51-7-594-943. Interesting about the different suppliers and such but the bottom line is we can armchair diagnose this all we want and ultimately be way off on what is the real problem with the HPFP. The only positive I can report is that the car runs better than it did even when it was new and mileage jumped up a lot. I realize the mileage is directly related to the old HPFP and it's problems. As others have said only time will tell and I do trust my dealer and believe they were told this info from BMW but whether BMW told them the truth is an entirely different issue.

[Oulixes]

Originally Posted by Gart

...
If ethanol was causing the failure, there would be many more stories of the instantaneous type.

I agree more with poor design. Hopefully the new one is going to put an end to this. If so, this board will lose 50% of its postings!
...

True, we will have to go back to discussing the blue topics:
a) charms of Montego blue,
b) how to pair Bluetooth phones.

[Terrance28]

Originally Posted by sf_loft

I am on my 3rd now. First one started showing signs and was replaced at 26k miles. Less than a month later and less than 1k, the new pump failed and I was driving in limp mode. Now, roughly about 28,800 miles, a little more than 1k from my last, I'm starting to get long cranks again. So it looks like I'll be on my 4th pretty soon. If it happens, I'm going to ask BMW for a buy back on my May 2008 build. It hasn't even been 2 years yet and I'm looking at 4 fuel pumps. I don't feel comfortable owning this car anymore, especially for long road trips. I drive a lot and expect that a new car will get me to my destination reliably. If a buy back is not possible now, I'm going to trade it in for a 550i F11 when it comes out.

Do you have the 943 pump?