rovcus

Found it! Thank you so much!

As already discussed the YWC103630 is part of the whole alarm/immobiliser system. This gives an overview of the complete system: https://rimmerbros.com/Item--i-GRID002848

I also found a diagnostics documentation that you can find here: https://www.miniscene-unterfranken.de/wp-content/uploads/downloads/Rover_Diagnosehandbuch.pdf (unfortunately in German but it gives quite accurate information about which system has been fitted since when.)

In my case the '95 model hat the Lucas 5AS but it can only be accessed via a green 3Pin connector in the engine bay. (no OBD style connector) It is not connected (coded) to the ECU. My car is still bricked but I found someone whom I can send the 5AS and the fobs and they can connect them.
My problem now is: I can not find the 5AS device in the car. It's a '95 216i Cabrio with a Honda engine. I searched in the footwell area and in the boot.

Thanks for the response. It's a late mk2 non-bubble (R8) 216 with the Honda engine (convertible). That is a fair question because there are MJ up to 93, 93 to 94.5, 94.5 to 96 and 96 onwards. This model has the Honda ECU and the Lucas 5AS (previous models had the 14VT). So it has the EKA (according to the manual - which shows the K-series engine and bubble interior anyway....)
The problem is that the T4 guy nearby doesn't have the 3pin connector, and the car has no OBD-style connector. Thus my inquiry about the pscan.

Thx for the reply. So it basically means no? It does not work without a working fob? I found this post, but I was not sure if it's the only way. Can I add a new fob without a working fob? In order to have a working fob? So many questions, sorry.

Is it possible to read the EKA without a working Fob. I just bought a Rover 216 from 1995 with the Lucas 5as installed. The Fob broke while changing the battery. (Yes I think it`s really broken and not out of sync.) It came without the EKA. It's basically bricked. Can pscan be helpful in any way? Or, what may be an alternative route? Thank you.