[jeff2.0t]

Originally Posted by research

The problem mechanic told me is also in Russia where they use same oil as in US - LL1. In europe it's LL4. LL4 doesn't work well with fuel used in Russia and US (it just doesn't last as long as it's intended) - so BMW replaces it with LL1 because they have no choice - exhaust gasses from fuel in certain contries causes the LL4 oil to "clot". THe car was designed for LL4, LL1 isn't doing the job - system out of order. TO me it makes sense but I don't wanna argue really, to be honest I don't care that much, I know if I want a 335i in Europe there is no reason not to buy it, it's very reliable (here). But In Australia, Russia, US, well - it's a bloody shame BMW fackedup but don't pretend it's a huge world wide problem, it just isn't.

I didn't find anything about this LL4 or LL1 fuel. Do you have any source explaining this, I would like to learn more about those fuel diff. The only diff I found was without or with Ethanol. In Canada we have no Ethanol unless specified on the pump (real rare).

[ajsalida]

Originally Posted by LagMode335i

You have an excellent point; I would like to add to that. If it were the "US" fuel causing the problem, then EVERY car in the US would be having this issue. The fuel would breakdown the pump internals and that would be that. It's obvious that BMW improperly designed the fuel system for the N54. Fortunately, other car vendors are bright enough to conquer this issue for their applications. If BMW were smart enough, they would have outsourced this design flaw to a bettter engineering company.

Well, I would refine your point and say that any BMW car with direct injection (implies a HPFP) might then be expected to have problems. I ran across some posts on another board about Audis with DI having problems, and other manuf have said that low sulfur gas is req. for the super high pressures needed for DI. BUT other manuf aren't having these HPFP problems on US gas (more like injector clogging) and even BMW has other engines with DI and HPFP with no problems (yet) as I pointed out. Ands as others have said N54/55 engines outside US are having problems.

Wonder if the above 7series HPFP would work, they use 2 in the 750 but same PN is for the pumps on the X6M monster motor.

[ajsalida]

Originally Posted by research

I talked about this as a continental thing. In Europe this is NOT that big of an issue, sure if you put a shitty 95 petrol or 95 Ultima, you should not expect wonders, but on 98... I have 2 friends who run 335i's, not a single issue in 4 years, only something with shocks wearing out too fast on front.

The problem mechanic told me is also in Russia where they use same oil as in US - LL1. In europe it's LL4. LL4 doesn't work well with fuel used in Russia and US (it just doesn't last as long as it's intended) - so BMW replaces it with LL1 because they have no choice - exhaust gasses from fuel in certain contries causes the LL4 oil to "clot". THe car was designed for LL4, LL1 isn't doing the job - system out of order. TO me it makes sense but I don't wanna argue really, to be honest I don't care that much, I know if I want a 335i in Europe there is no reason not to buy it, it's very reliable (here). But In Australia, Russia, US, well - it's a bloody shame BMW fackedup but don't pretend it's a huge world wide problem, it just isn't.

Unless the pump is oil pressure driven I do not see what oil has to do with anything in the HPFP. I thought it was an electric pump.

[John 070]

Originally Posted by ajsalida

Unless the pump is oil pressure driven I do not see what oil has to do with anything in the HPFP. I thought it was an electric pump.

It's like a fishing boat going out to the deep sea. When it returns and the 10 fisherman go to shore, each one tells a different story of what transpired on the trip.

Everyone likes to spin a good yarn now and again. And you're right, oil has nothing to do with the fuel system.

[Tallest]

Originally Posted by jeff2.0t

I didn't find anything about this LL4 or LL1 fuel. Do you have any source explaining this, I would like to learn more about those fuel diff. The only diff I found was without or with Ethanol. In Canada we have no Ethanol unless specified on the pump (real rare).

LongLife4 oil, not fuel. pump is obviously not driven by oil, i never said that. I assume oil you add lubricates engine and parts, and it affects the pump somehow as well, but I'm not mechanic, just passing what the mechanic said, you can ask your mechanic about this, John overhere doesn't know any better so I wouldn't take his word over mine any time (this is internet afterall), check with the mechanic and see if it makes sense. John seems to be upset because i singled out this as regional issue and he took personaly for some reason.
Think about it. On this forum people can't possible have enough technical knowledge to give to pretend they know how something as complicated as modern BMW engine operates. People put on 10.5 inch rims and oversized tyres, and push rims out with 20mm spacers and say it's OK but refuse to add something like ActiveSteering when loading cars with options because they think it takes away from driving experience... It's very ironic given that they are happy to live with massive tramlining that the active steering usually takes out by a large degree, or the fact that slapping on rims larger than BMW intended makes the car worse to drive. That's just one example of why you shouldn't listen to what people write on forums and instead go talk to your mechanic if you have one. That's all.

[Psukhe]

^^^

How the, why the, what the?

How can oil type possibly affect the operation of the electric fuel pump? It's like saying improper tire pressure will make your pump fail.

It's simply illogical.

Besides & unfortunately, most mechanics really aren't that "smart" - perhaps the mechanic that told you this drivel is simply an idiot?

[SCMike]

This discussion of LongLife 04 versus LongLife 01 oil is mostly a load of bullhockey. BMW's specification of LL1 for the turbo engines IS BMW's specification. That oil meets the required ACEA A3 standard, with the test engine being SPECIFICALLY the M54 to demonstrate compatibility with the valvetronic system. The LL4 oil was specifically developed for DIESEL engine applications and meets additional test requirements for compatibility with the particulate filters on DIESEL engines. LL4 is backwards compatible with LL1, but not vice versa. Jeez - spend 10 minutes with Herr Doktor Google and learn a bit.

[John 070]

Originally Posted by Psukhe

^^^

How the, why the, what the?

How can oil type possibly affect the operation of the electric fuel pump? It's like saying improper tire pressure will make your pump fail.

It's simply illogical.

Besides & unfortunately, most mechanics really aren't that "smart" - perhaps the mechanic that told you this drivel is simply an idiot?

That guy you're referring to said, "This is the internet." That shows he doesn't give any care to what he says, because there are no consequences. Some people choose to treat the internet and a forum with similar care as if having a face-to-face conversation, others just reiterate whatever they hear logical or not. The thrill is perhaps similar to forwarding a chain email, yelling "fire" in a crowded theater, or programming the latest virus.

The other thing is it kind of makes a difference if you have what's the latest buzz term, "skin in the game?" The guy doesn't even have a 335, so what does he know or care? Why would you even follow a N54 thread if you don't have one?

[jeff2.0t]

I agree oil has nothing to do with a fuel pump...

Lubrification of the pump is made with FUEL... So yes Fuel quality and addtivies can affect lubrification spec and this can affect the pump.

But oil no way.... In certain Vw/Audi (FSI turbo engine) oil could affect the HPFP because the pump is Cam activated with a Cam lobe. But this technology was too complex and unreliable(the lobe between the cam and HPFP wear to fast) it was rapidly scraped for Non Cam activated HPFP(TSI engine). The N54 is not Cam activated.

[BTM]

Weird that for my build date 11/06 on realoem they list pump p/n I've never seen before

13537537320 <
13517585655 <
13517592881
13517596123 <
13517594943

http://realoem.com/bmw/showparts.do?...83&hg=13&fg=15

Obviously none of them work, but it seems that perhaps other p/n exist for some reason?

[carlosu]

Dear friends, i drive a 2007 335 coupe 33k miles, and I have been reading about all the hpfp that are failing, and I want to know if I have the same problem, a few weeks ago I was driving fast and the power went away and I had the "service engine soon" light on and the 1/2 power light on as well, so I stopped I turn off the engine, and turn it on again and it was all fine, but every time I drive fast and push the engine hard I have 1/2 power light and "ses" light back on again. All I want to know is that if the hpfp is failing, could the car sometimes be running normal and from time to time be in limp mode when I push the engine?.

thanks very much,

carlos

[FJc335]

Anyone know if HPFP replacement will show up on carfax? How do you know if a car has had hfph replaced other than checking with the dealer?

[BTM]

Originally Posted by FJc335

Anyone know if HPFP replacement will show up on carfax? How do you know if a car has had hfph replaced other than checking with the dealer?

Won't show up on carfax, but if it has been lemoned it will. If the car doesn't have complete service records, best bet is to just take the VIN into the dealer.

[ThreeseriesFTW]

Originally Posted by carlosu

Dear friends, i drive a 2007 335 coupe 33k miles, and I have been reading about all the hpfp that are failing, and I want to know if I have the same problem, a few weeks ago I was driving fast and the power went away and I had the "service engine soon" light on and the 1/2 power light on as well, so I stopped I turn off the engine, and turn it on again and it was all fine, but every time I drive fast and push the engine hard I have 1/2 power light and "ses" light back on again. All I want to know is that if the hpfp is failing, could the car sometimes be running normal and from time to time be in limp mode when I push the engine?.

thanks very much,

carlos

Do you have an oil cooler (ie, a vent in your front passenger side wheel well)?

[carlosu]

Originally Posted by corb

Do you have an oil cooler (ie, a vent in your front passenger side wheel well)?

Sorry I dind´t undestand. What did you mean?

[BTM]

Originally Posted by carlosu

Sorry I dind´t undestand. What did you mean?

Oil temperature could trigger this but if your temperature is "normal" it shouldn't. The repeated limp mode when pushing the car is a sign fuel delivery problems thus possible HPFP failure, though if it never appears unprovoked you probably have a while to go before an outright failure, whatever it is. Next time the car is in for service these codes will be stored - mention it to your SA as well.

[John 070]

Originally Posted by carlosu

Dear friends, i drive a 2007 335 coupe 33k miles, and I have been reading about all the hpfp that are failing, and I want to know if I have the same problem, a few weeks ago I was driving fast and the power went away and I had the "service engine soon" light on and the 1/2 power light on as well, so I stopped I turn off the engine, and turn it on again and it was all fine, but every time I drive fast and push the engine hard I have 1/2 power light and "ses" light back on again. All I want to know is that if the hpfp is failing, could the car sometimes be running normal and from time to time be in limp mode when I push the engine?.

thanks very much,

carlos

Obviously we can't tell just by your description. I got the 1/2 power warning, and it went away upon restart. The original dealership, you guessed it, said "can not duplicate, vehicle performing as designed." The 2nd and new dealership said it was VANOS intake solenoid.

[jeff2.0t]

Originally Posted by BTM

Won't show up on carfax, but if it has been lemoned it will. If the car doesn't have complete service records, best bet is to just take the VIN into the dealer.

X2

[Mr. ///M3 RD]

Originally Posted by TrackRat

Nope I have no problem with the N54 engine other than the fact that the HPFP, injectors, ignition coils, sparkplugs, turbos, fuel pressure sensors and wastegates all fail at very high rates and have done so for four model years yet BMW has not provided a proper solution for these chronic failures.

Other than that the N54 is a great engine, well when it's running properly.

+1

touch wood

[lees123]

11,000 + miles on 943 pump. So far so good. I'm going for service tomorrow for trans. oil leak.

[carlosu]

Thank´s very much guys, aparantely the problem a was spark plug (N#3), so I replaced all of the spark plugs and the car its almost fine, but I am spending a lot more fuel; in the shop they told me I need to replace the engine coil for the 3erd cylinder, because in idle mode sometimes the car shakes just a little bit you can´t almost feel it.

Thanks again.

carlos

[tomchang75]

The problem with the extended warranty to 120k is if you take your car and end up not being the HPFP, you get hit with the inspection fee of $175-200