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Thread: 2.0d question

  1. #1
    Join Date
    Jan 2018
    Location
    B.C. Canada
    Posts
    4
    My Cars
    F25, E30, B5S4 devil car

    2.0d question

    I know this is the F30 section but from what I can tell the 2.0 diesel was much more common in this platform than the F25 (at least here in Canada, 2 years only). I hope its OK to post this here. Here goes:

    Our 2015 X3 2.8d has been to the dealer 6 times in 3 months. Grunt. (under warranty)

    CEL 1 - First they re calibrated something to do with a sensor in the exhaust.
    CEL 2 - New sensor in the exhaust
    CEL 3 - Another new sensor in the exhaust
    CEL 4 - All new exhaust system and DPF
    Latest check eng. light
    CEL 5 - Vehicle failed high RPM airflow test so: Downstream Knock sensor and the swirl flaps need to be replaced and 10+ hours of walnut blasting in the intake.

    ^Anyone had similar issues? What on earth do swirl flaps do? Will a delete (EGR) reduce intake buildup? I'm already looking to a DPF delete... or selling once the warranty is up. The hangup is my wife and I love it soooooo much when it works!

    Thanks,
    Cam

  2. #2
    Join Date
    Oct 2009
    Location
    Bellevue, WA
    Posts
    2,403
    My Cars
    335d, 328xd (had 330xi)
    Quote Originally Posted by skyoverocean View Post
    I know this is the F30 section but from what I can tell the 2.0 diesel was much more common in this platform than the F25 (at least here in Canada, 2 years only). I hope its OK to post this here. Here goes:

    Our 2015 X3 2.8d has been to the dealer 6 times in 3 months. Grunt. (under warranty)

    CEL 1 - First they re calibrated something to do with a sensor in the exhaust.
    CEL 2 - New sensor in the exhaust
    CEL 3 - Another new sensor in the exhaust
    CEL 4 - All new exhaust system and DPF
    Latest check eng. light
    CEL 5 - Vehicle failed high RPM airflow test so: Downstream Knock sensor and the swirl flaps need to be replaced and 10+ hours of walnut blasting in the intake.
    Don't know what a "downstream knock sensor" is. Also, there are several sensors in the exhaust: at least two NOx sensors, one or two O2 sensors, pressure sensors around the DPF to decide when the ash mass is high and a regeneration cycle is needed. More information is needed.

    I will say that the NOx sensors have been very problematical - BMW extended the warranty on them in the E90 335d/E70 X5d to 10/120K.

    Swirl flaps cause differing velocities in the airflow into the two intake ports and promotes better combustion. They open/close at different rpm.

    The diesel subforum is the best place to post. Might also check the X3 forums.

  3. #3
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,462
    My Cars
    36 Cylinders
    Hmm, my parents just got one of those, with low miles, and no known issues yet.

    I don't think there's a knock sensor...
    Need more detail.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  4. #4
    Join Date
    Jan 2018
    Location
    B.C. Canada
    Posts
    4
    My Cars
    F25, E30, B5S4 devil car
    The exhaust sensors were indeed Nox sensors and I suspect the "downstream knock sensor" is probably a "downstream Nox sensor" (lost in translation)
    Ill look for the diesel sub forum, Thanks.

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