nedd a part # identified

[Ti Kan]

GMBCHEF at aol.com writes:
>  Hi, all. I was stripping a 4k of it's console gauges and harness and saw a 
> black box inside the console with a vacuum hose connected to it.
>  Part number is 811 907 397 . Neither my 4kq or my 4kq parts car have it, nor 
> does my 85 ur-q. Any clues?

That is the ECU for the digital knock sensing ignition system.

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
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