Hi i'm new here and have spent hours trying searches trying to find out where the ICM is on my 2001 A4 1.8t- so please don't flame me right away! im trying!
I have diagnosed no spark #4 cylinder- swapped coils from 1 and 4 and 4 is still dead- and the plugs are fine. There is no spark on 4. i had changed ICM's before on earlier models which had it on the airbox but it must be somewhere else on the later cars. Please help!
oh yes and all the usual symptoms like no power, chugging yada yada yada.

 

there are a couple of small pieces on your air box.. one or two. i think.. your icm is one of them.. i think 4 wires going in one side and 5 or so in the other end..thats your icm...

 

nope- nothing there! wtf?

 

okay... i was thinking of an older a4.. like a 98 or 99.. so i think the ecm controls your coil fire... i dont think there is a module.. i could be wrong though..

 

ok so i've tested a few things- and now need to find the ECU. is it inside the car? i need to check continuity on the coil wiring.