Keep crankcase pressure in check and route blow-by vapors where they belong with the Standard Ignition PCV Valve (V801). It installs as a direct-fit replacement for the listed applications, including the 2002-2005 BMW 745I and 745LI, 2004-2005 BMW 545I and 645CI, 2004-2010 BMW X5, 2006-2010 BMW 550I and 650I, 2006-2008 BMW 750I and 750LI, and the 2007-2008 BMW ALPINA B7.
- How it works: the PCV valve uses intake manifold vacuum to draw blow-by gases out of the crankcase and feed them back into the intake, where they are re-burned instead of building up pressure inside the engine.
- Metered, one-way flow: the valve regulates how much vapor is pulled based on engine conditions and helps prevent backflow into the crankcase.
- Signs it may need replacing: rough or unstable idle, oil seepage past seals and gaskets, oil pulled into the intake, or a whistling/vacuum noise.
- Routine service part: if a stuck or clogged valve is the cause of poor crankcase ventilation, replacing it with V801 restores proper vapor flow.
Interchange: 11127537733 · 11127547058 · PCV886 · 2-9872 · 29872
Manufacturer part number V801.
See the Buyer's Guide tab for the full list of covered vehicles and years.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the PCV valve V801 do?
It uses intake manifold vacuum to draw blow-by gases from the crankcase back into the intake to be re-burned, while metering that flow and helping prevent backflow into the crankcase.
Which vehicles does this fit?
It is a direct-fit replacement for applications such as the 2002-2005 BMW 745I/745LI, 2004-2005 545I/645CI, 2004-2010 X5, 2006-2010 550I/650I, 2006-2008 750I/750LI, and 2007-2008 ALPINA B7. See the Buyer's Guide tab.
What are the signs a PCV valve may need replacing?
Common signs include rough or unstable idle, oil leaks past seals and gaskets, oil drawn into the intake, and a whistling or vacuum noise. Diagnose the cause before replacing.
What numbers does this part interchange with?
It interchanges with 11127537733, 11127547058, PCV886, and 2-9872 (also written 29872).
Will replacing this fix my rough idle?
If a stuck or clogged PCV valve is the cause of the rough idle, replacing it with V801 restores proper crankcase ventilation. A rough idle can have other causes, so diagnose first.
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