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Thread: 135i N54 help!

  1. #1
    Join Date
    Jan 2017
    Location
    Sacramento
    Posts
    1
    My Cars
    2009 BMW 135i (6MT)

    135i N54 help!

    Link to video of issue I'm having:
    https://youtu.be/KUCtqRQQYxw

    Got my 2009 135i around a year ago with 62k miles on it, currently sitting at 71k. I've been having this problem with the car ever since a few months after I got it. This randomly happens during the cold start. Most days it starts up fine but every once in a while upon cold start the car sounds different when started up. A deeper growl from the exhaust and car begins to moderately shake. The RPM's don't stay put after I turn it on, it begins to rev on its own once or twice up to about 3k. After this random rev the car shakes and idle does not stay still. I've tried driving it once before when it was experiencing this problem and the car feels weak and jerks while I drive. Lately when this problem has been happening my service light turns on. I should also mention that on days when the car starts up without a problem, when I'm at a red light or in neutral the rpm's rev up just past 2k then fall back down to where they belong. This will happen in intervals of about 45 seconds.

    Thanks in advance for any feedback!

  2. #2
    Join Date
    Jan 2017
    Location
    CT
    Posts
    4
    My Cars
    1965 Riviera GS
    sounds like a waste gate problem.

  3. #3
    Join Date
    May 2015
    Location
    Atlanta, GA
    Posts
    3,608
    My Cars
    540i6 S2M5 M2C 135 S52ti
    It could be a number of things can you scan it for Code,'s either pending or thrown?

  4. #4
    Join Date
    Jan 2017
    Location
    Las Vegas
    Posts
    2,887
    My Cars
    335,328
    Are you getting any codes?

  5. #5
    Join Date
    Oct 2014
    Location
    Portland, Oregon
    Posts
    161
    My Cars
    2010 E82 135i
    Could be any number of issues. Get the codes read.

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