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  1. X5 E53 (1999 - 2006)
    So two years ago, I had kept getting repairs and doing multiple drive cycles. Finally it ended up being a secondary mass airflow relay. And then it passed smog. Now it***8217;s time for smog again, engine light is on. Same code***8230; Secondary mass airflow sensor. But on the professional code...
  2. X3 E83 (2004 - 2010)
    2006 BMW X3 3.0 Throwing codes p0171 and p0174 band 1 and 2 are too lean. I ran live diagnostics on the car while driving. The O2 Bank 1 and 2 sensors short term fuel trim is showing at a constant 92%. The data also says the fuel system is maintaining an open loop on system b. Why wouldn't the...
  3. E60 / E61 (2004 - 2010)
    I have a mild vacuum leak I believe. There is a small rough idle, and when I ran it through my obdll I got these codes;po171,po174,po300,po306,po304! I believe its a vacuum leak somebody help!! please.:bawling:
  4. E90/E91/E92/E93 (2006 - 2013)
    '07 323i vacuum?CCV? VANOS? Hi all, Please give me a hand here! Any thoughts on a diagnosis for this issue? I've got sluggish acceleration until 2500rpm, oil smell, burning oil rapidly, stalling followed by brief engine light after a half hour of highway driving. Mechanic was no help because...
  5. E39 (1997 - 2003)
    I have been on here for a while now trying to learn as much as I can from all you Bimmerfest vets. The only problem is... It gets a little difficult to decipher ( till its too late) For a beginner like me if What I just learned applies to my 2000 540i (e39) or not. So I'm hoping all will help...
  6. E39 (1997 - 2003)
    2003 530I. Got these codes (06,19) from my Peake analyzer. Fuel injector and ignition coil cylinder 1. Replaced coil and all new fuel injectors. Then read a thread about the CVV and the test which was remove the oil filler cap and car idle changes or runs rough, CVV should be replaced and all...
  7. E46 (1999 - 2006)
    Just to help out on the E46 side, we've done a lot of research lately into figuring out exactly what vacuum tubing (one material), hoses (multiple materials), and pipes (rigid) and vacuum endcaps to replace. The Realoem diagrams for the M54 are notoriously inaccurate; so we also corrected them...
  8. E39 (1997 - 2003)
    How does the BMW E39 sucking jet pump (aka suction jet pump) work & how does it fail? EDIT: It's a vacuum multiplier, which provides more than manifold vacuum could alone, to the brake booster where behind the master cylinder. The air flow goes from the brake booster to a hose at the top of the...
  9. E39 (1997 - 2003)
    E39 M52 owners: Please check your realoem diagrams against your vehicle & help us out To M52 owners: 1997***8211;2000 528i - 2.8 L M52B28 I6, 190 hp (142 kW; 193 PS) USA 1996***8211;2000 520i - 2.0 L M52B20 I6, 110 kW (150 PS; 148 hp) non-USA 1996***8211;2000 523i - 2.5 L M52B25 I6, 125 kW...
  10. E39 (1997 - 2003)
    EDIT: On the M54 CCV, the vacuum port is closed off with an endcap On the M52, the vacuum port of the CCV provides vacuum for the fuel pressure regulator On the M62, the vacuum port of the CCV provides vacuum for the sucking jet pump ----- I'm curious WHERE the vacuum hose goes for the E39...
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