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Thread: Serious Safety Issue 2004 3301

  1. #1
    Join Date
    May 2017
    Location
    Santa Barbara, CA
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    2
    My Cars
    2004 BMW 330i

    Unhappy Serious Safety Issue 2004 3301

    My 2004 BMW 330 will suddenly lose power (all red lights flicker then come on; vehicle loses power, suddenly jolts to a near halt for about 2 - 5 seconds, then picks up again). Brake light and yellow warning light stays on, but disappears after I turn off engine and restart. Happens sporadically and unpredictably. My mechanic has already replaced the harness and the DME (at great expense) but problem still persists. Has anyone seen this before?

  2. #2
    Join Date
    Apr 2009
    Location
    Vancouver Isl, BC, Canada
    Posts
    4,173
    My Cars
    98 Euro M3, 04 M3, 06 M5
    sounds like a power supply issue. What are the faults stored in all the modules? Why did the mechanic suspect the DME? The DME's dont fail randomly in these.

    Does the engine stall when this happens?
    Last edited by legoman67; 05-12-2017 at 02:35 AM.
    Current:

    - 09 335i MSport, FBO.
    - 98 Euro M3, Estoril Blue
    - 04 M3, Carbon Black, 6 Speed Coupe
    - 06 M5, Black on Black, Full Leather.
    - 73 3.0CS, Tagia Green, 5 speed M30b35 converted

    Ex's: 1984 325e, 1988 325IX, 1992 525I, 1995 540i/6, 2002 330i, 2005 330xi, 1992 850i, 2003 330i #1, 2003 330i #2, 2002 330ci, 2004 330ci, 2007 328CI, 2007 335i, 2001 M3, 2006 M5 6 speed

  3. #3
    Join Date
    May 2017
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    Santa Barbara, CA
    Posts
    2
    My Cars
    2004 BMW 330i

    no stall

    Quote Originally Posted by legoman67 View Post
    sounds like a power supply issue. What are the faults stored in all the modules? Why did the mechanic suspect the DME? The DME's dont fail randomly in these.

    Does the engine stall when this happens?

    No, it does not stall. Mechanic reported that BMW's alerts recommended replacing harness, and then DME. Big $$$.

  4. #4
    Join Date
    Dec 2013
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    Chicagoland area
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    4,372
    My Cars
    EXOTICS
    Check all battery cables and engine -grounds for clean, tight connections.

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