Drive unit in N62 intake manifold

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08-22-2011, 06:30 AM

Stephen Max

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My Ride: 2004 545i Sport 1998 M3

The intake manifold has a so-called "drive unit" attached to it, part number 2 in the figure below:

Drive unit in N62 intake manifold-n62-intake.png

I couldn't find any information on what the drive unit does. Can anybody elucidate me?

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08-22-2011, 08:11 AM

micosan

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Quote:

Originally Posted by Stephen Max

The intake manifold has a so-called "drive unit" attached to it, part number 2 in the figure below:

Attachment 125049

I couldn't find any information on what the drive unit does. Can anybody elucidate me?

The motor on the back of it slides the clamshell looking things (the intake runners) to make them shorter or longer to tune the engine (based primarily on RPM, if I recall correctly).

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