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  1. Auto trans issue after M54 conversion

    General E46 Forum
    I'm just finishing up my 04 coupe project and I'm having a transmission/TCM issue hopefully someone can help me out with. The car is an 04 sulev M56 car. I bought it with a bad engine (no compression on #5). It ran rough but was able to drive on the trailer and around the driveway. No...
  2. FS: M56 Valve cover

    Engine & Performance
    M56 valve cover Aluminum Valve cover Plastic M56 engine cover Plastic tube from valve cover to intake manifold M56 harness Shipped $250 within 48 States
  3. M56 Valve Cover Swap - Positive Crankcase Pressure?

    General E46 Forum
    Hi Guys! Long time member here. Recently completed a full m56 Valve cover swap - including PCV delete. I'm now getting a large amount of positive pressure through the crankcase which is leading to oil leaks around the engine. When removing the Oil fill cap I get the sound of air pushing out...
  4. 2003 330i ZHP

    Complete Cars - Private
  5. Any E46 M56 Valve Cover swap kit for M54 upgrade/CCV delete

    Engine & Performance
    SOLD I have a used M56 aluminum valve cover, beauty cover, breather hose and dipstick tube. If you have a post- 9/02 M54, this is what you need to swap your M54 engine to the M56 valve cover, deleting the annoying external CCV. If you have a pre- 9/02 car, you'll need a later-model coil harness...
  6. 2004 BMW 325i M56 Intake ???

    DIY: Do It Yourself
    Ok so I'm looking to hear if anyone has any info. The M56 SULEV engine has a hydrocarbon filter built into the air box as a part of the emissions system. This to me says "restriction" removing it would be simple enough however would mean you can not replace it in the future if needed. The one in...
  7. Risks Installing an Intake System meant for 330 onto a 325 w/ m56?

    General E46 Forum
    Hey there guys I'm pretty new to forums but i haven't seen a thread that speaks on risks for installing an e46 330 intake to a e46 325 m56 engine. Is that okay or am I hopeless having a m56..? If there are no risks Im considering installing the AFE .. or K&N..with a dry filter
  8. Fuel pressure

    General E46 Forum
    How do I test fuel pressure to injectors in 2003 325i with m56 engine? Thanks
  9. 2004 325i Wagon For Sale

    Complete Cars - Private
    111k miles and ready for 3 times that. Forget the SUV, this is a sporty car with the convenience of a wagon and with decent gas mileage as well 18/24. Fully loaded. Extremely clean. Second owner, no damage. All paperwork and service papers upon sale. Carfax avail. Must see car, in good shape and...
  10. Humming noise ? Fuel pump?

    General E46 Forum
    Humming noise. Hear it from the back driver side wheel. Thinking fuel pump. Normal?? Car runs fine.
  11. ***The Official M56 SULEV Warranty Documents, Check-in, and Questions Thread***

    Driveline, Engine & DME Tuning
    In this first post, I am including any important information I find for SULEV owners, regarding warranty, part compatibility, etc. The Air Resource Board approvals indicate a service life of exhaust and evaporative emissions components as being 150,000 miles. I'm just curious how many M56B25...
  12. 325i M56 SULEV Active Autowerke tune review

    Driveline, Engine & DME Tuning
    Hi everyone, A few weeks ago I had my 2004 325i premium sport tuned by JLeviSW with an Active Autowerke Tune. As the title states, I've got a M56 SULEV engine (fully known as M56B25). I've put just shy of a 1000 miles on the car since the tune, so I thought I'd post up a review. The tune had...
  13. M56 Engine Headers

    General E46 Forum
    I am interested in getting the ebay headers everyone seems to like on this forum but I was wondering if I can get them since I have an M56 engine?....2005 325ci... Thanks for the suggestions...also, is this a DIY project for a novice?
  14. Spark Plug Change on e46 M56 Engine

    General E46 Forum
    This weekend I decided to change my spark plugs so I looked over the DIY and found some great instructions and thank you for posting that. However, I have a M56 engine and I believe that the last (6th) spark plug if farther back in the engine bay than a M54 engine. My question is, how in the...
  15. Air Intake System

    General E46 Forum
    I have a 2005 325ci with the M56 engine. I would like to put in an after-market Air Intake System. When I look at ebay, they range from $15 - $300. Does anyone have this engine and can you give me advise on what I should install for a M56 engine? I do not want to spend too much or too little...