Quick & Dirty way to tell when knock sensors were introduced by Audi

[Ti Kan]

I wrote:
> Basically, a quick rule of thumb is that since model year
> 1984, all turbo
> engines and all normally aspirated that that have 10:1
> static compression
> ratio or higher have knock sensors.

Oh, and one exception to that "rule of thumb" is the UrQ.  The '84
and '85 models carry the same WX code I5 turbo engine from 1983 and
has no knock sensor.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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