I highly doubt your ecu is bad. My car after being built wouldn't fire a single coil and I had an electrical engineer come and test every single wire in the car. Mind you this guy fixes Universal studios animatrionics so he knows his $hit...

However, I decided not to listen to him and insisted it was the timing. Fixed the timing and fixed the problem...

Now, I'm not saying you have a timing issue but you probably have a cut wire or bad sensor somewhere. Check everything before you drop 2k or more on a standalone.

 

You must deal with Nissan if the dealer refuses, he is just doing his eyes and ears job to try to save Nissan money.

You obviously didn't make friends with dealer service manager before the problem occurred..........bribery [gratuity] as I understand it is a normal acceptable solution in Greece?

Not like the ecu never fails, over the years we have seen a few ecu with the exact same problem........usually caused by a wiring short overheating the switching transistor.

Probe the ecu before the harness to make sure the transistor is actually open and not some wiring connector defect. or a bad coil by subsitution.