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  1. #1
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    BMW Releases New Fuel Injector

    Ok folks,

    I am sure some of you have already seen this on shivpost, but I just wanted to share this here for those who may have missed this.

    BMW has recently released an updated injector for our cars. Here are the details:

    Latest: 13538616079
    Previous: 13537585261

    From what I am gathering, there is a TSA which states that the two injector parts are INCOMPATIBLE with one another! This means that if you want to get the new part number, you will need to get 6 of them as you can't mix and match.


    The new version has enhanced internal filtering and special thermo compensating oil.


    This may/may not prove to be what we need to run pure E85 without the risk of damaging the injectors.

    FIY, about three weeks ago, I was able to order a 261 injector from Tischer. They still have them in stock. I'd snatch one or two and stock them up as the new injectors are $200 EACH and you'll need 6 to run them.

    BMW most probably have stopped supplying 261 injectors to the dealers.
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    Wowzers. Just the normal injector coding (on all 6 of course) to make this work?

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    Click here to enlarge Originally Posted by mj6234 Click here to enlarge
    Wowzers. Just the normal injector coding (on all 6 of course) to make this work?
    Yes. The injector coding procedure does not change. It's just that if you want a new injector, you need to get all 6. I think it will be wise to snatch one or two of the 261 injectors before they become extinct and we are forced into a $1200 injector bill.
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    I wonder exactly why they wouldn't be interchangeable.
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    Click here to enlarge Originally Posted by rader1 Click here to enlarge
    I wonder exactly why they wouldn't be interchangeable.
    Good question! If I was to make a guess, and this is a guess, the knock detection sensitivity is different.
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    Click here to enlarge Originally Posted by vasillalov Click here to enlarge
    Good question! If I was to make a guess, and this is a guess, the knock detection sensitivity is different.
    If that were the case i would assume that the DME would REQUIRE an updated ROM to accurately interpret the new signal... If the coding process is exactly the same i have a feeling that they can be interchanged.
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    Click here to enlarge Originally Posted by rader1 Click here to enlarge
    I wonder exactly why they wouldn't be interchangeable.
    BMW designing them that way so that we do have to buy a full set?
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    Injectors aren't detecting knock, so i fail to see the correlation. Supposedly they have some sort of compensation oil in them for temperature. Maybe that has something to do with adaptation values and having one or two off could cause the DME to throw some CEL's? Who knows.
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    The DME is a marvel of engineering. But it's not a wizard, so I doubt the injectors are detecting pre-detonation.

    On the other hand, the DME is so advanced it can monitor the voltage potential across the gap of the spark plug during combustion, which means it can tell precisely when combustion begins or began, meaning the DME could potentially know about pre-ignition before the knock sensors hear it. Click here to enlarge

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    didnt undercover say that the injectors were not monitoring the knock?

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    DUUUUH!

    My apologies! I have no idea what had gotten into my thick head when I put injectors and knock detection in the same sentence! If course injectors have nothing to do with knock detection!

    Its all in the coils (and knock sensors), not the injectors....
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    @vasillalov - any chance you can post the content/text of that TSA that says injectors are incompatible?

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    I think it's been stated here a few times. People get confused (including me the first time I heard about it) when they're told their car can feel knock on all 6 fingers (with the spark/coils) and hear knock with the knock ears (don't they have multiple knock sensors too?).

    I have an injector going bad (long cranks intermittently), would the dealer warranty all 6 due to this new part?

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    I don't know but I can ask for more specifics about the new injectors (specifically if their inter-compatible) -- I'm planning on scheduling my car for that battery cable recall since I received the letter from the dealer last week.
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    Is it possible this new injector is a cure for the DI and carbon buildup issues?
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    You guys are getting smart.

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    Click here to enlarge Originally Posted by StinkyM Click here to enlarge
    Is it possible this new injector is a cure for the DI and carbon buildup issues?
    I doubt it. The carbon build up is due to the PCV system not catching 100% of all oil fumes. There is no way around that.
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    Has anyone looked at the m5 hpfp? Possible it flows more and we could swap it in?
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    Has anyone looked at the m5 hpfp? Possible it flows more and we could swap it in?
    It has two of them. Mounting two HPFPs in some way for N54 as well could be doable, but challenging. I don't know if these two could be made to fit instead of doubling N54 HPFPs.

    http://www.realoem.com/bmw/showparts...64&hg=13&fg=15

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    Click here to enlarge Originally Posted by 654 Click here to enlarge
    It has two of them. Mounting two HPFPs in some way for N54 as well could be doable, but challenging. I don't know if these two could be made to fit instead of doubling N54 HPFPs.

    http://www.realoem.com/bmw/showparts...64&hg=13&fg=15
    Totally makes sense they went with two pumps Click here to enlarge
    Click here to enlarge

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    Click here to enlarge Originally Posted by vasillalov Click here to enlarge
    Its all in the coils (and knock sensors), not the injectors....
    Do you have any proof or more information that the N54 coil packs have anything to do with knock detection ?

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    Click here to enlarge Originally Posted by cstavaru Click here to enlarge
    Do you have any proof or more information that the N54 coil packs have anything to do with knock detection ?
    N54 documentation doesn't mention ionic sensing (i.e. using spark to understand in-cylinder environment/behaviour)...the S65 documentation does mention it and it does use it...given that i'd assume all the N54 has is its external knock sensors (microphone pickups)...assumption given what's in the docs
    Click here to enlarge

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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    N54 documentation doesn't mention ionic sensing (i.e. using spark to understand in-cylinder environment/behaviour)...the S65 documentation does mention it and it does use it...given that i'd assume all the N54 has is its external knock sensors (microphone pickups)...assumption given what's in the docs
    Fair assessment, I haven't read any of the tech docs. I have however seen some lists of possible spark codes that have some pretty wild definitions. It also wouldn't be the first time a large automaker has integrated something new without mentioning it in tech documents, in case they need to pull it with a recall or DME update later. Easier to not reprint the book. I guess until that part of the code mask is cracked or there is hard evidence it's best to not assume though.

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    Click here to enlarge Originally Posted by StinkyM Click here to enlarge
    Is it possible this new injector is a cure for the DI and carbon buildup issues?
    DI & Carbon Build Up go hand-in-hand, new injectors won't fix that Click here to enlarge
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    N54 documentation doesn't mention ionic sensing (i.e. using spark to understand in-cylinder environment/behaviour)...the S65 documentation does mention it and it does use it...given that i'd assume all the N54 has is its external knock sensors (microphone pickups)...assumption given what's in the docs

    Yes, but INPA shows you per cylinder knock adaptations...
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