After some confusion over the use of IACs with Pers soft and firmware, I had a closer look at the three Bosch IAC valves I have on my workbench, all from scrap.

All three operate differently and there are also discrepancies between Pers data and those I found when checking against what I got. Here is my little contribution:

Bosch 0 280 140 505 (Also VW Audi 034 133 455):

Bosch 0 280 140 501

Bosch 0280 140 516

Dave Brul

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